A View of the Tampa Bay Hotel on the Hillsborough River with the hotel's Plant Park in the foreground. Auteur(s) : Burgert Brothers, 1917- ( Photographer ) Résumé : When Henry B. Plant brought the railroad to Tampa in 1884, he opened the door for many businesses to locate and flourish here. The railroad was at the center of the city's economy. From downtown it went to Port Tampa where one could board a Plant steamship to Jamaica, Cuba, New Orleans, Bermuda or other destinations. A spur of the rail line brought the train up to the west front of the hotel so guests could depart the train and walk directly into the lobby.
The Tampa Bay Hotel cost approximately 2.5 million dollars to build and $500,000 to furnish. Consisting of 511 rooms, some of which were suites of 3-7 rooms, it provided a degree of luxury never before seen in Tampa. Most of the rooms had their own baths and all had electricity and telephones. In addition, guests were surrounded by a varied collection of furniture, porcelains, Venetian-style mirrors, and sculptures gathered by Mr. and Mrs. Plant in their travels in Europe.
The Tampa Bay Hotel opened in 1891 amid wide fanfare and celebration. Henry Plant's dream was now a reality. The newspapers of the day described it as "brightly illuminated, filled with sumptuous decorations, thrilling music and graced with turrets, domes and minarets towering heavenward and
glistening in the sun." It was a Victorian palace.
The hotel was a lively place with balls, tea parties, and organized hunts during the winter social season. It was open seasonally from December to April in the 1890's. Once a guest arrived at the hotel, he needed to be entertained. Guests went wild game hunting as well as fresh and salt-water fishing. Water sports were also included like sailing, rowing, and canoeing. For the less adventuresome, there were bicycles, carriages, and rickshaws to ride you around the property. The hotel also offered golf, tennis, shuffleboard, billiards, and even a racetrack. (Funding) Funded in part by the Institute for Museum and Library Services (IMLS), Ephemeral Cities Project. Tampa |z 1271000 |2 ceeus Hillsborough County |z 12057 |2 ceeus United States of America -- Florida -- Hillsborough County -- Tampa Droits : All rights reserved. 2005. D20-007 | Partager Voir aussi Hotel ( Building, Structures ) ( nmc ) Tampa Bay Hotel (West Lafayette and Hyde Park Avenue) ( nmc ) Hotels ( lctgm ) Minarets ( lctgm ) Historic parks ( lctgm ) Plant Park (West Lafayette Street opp Hyde Park Avenue) ( lctgm ) Rivers ( lctgm ) Hillsborough River ( lctgm ) Piers and wharves ( lctgm ) |
Boats fill the Hillsbourough River in front of the Plant Park and the Tampa Bay Hotel. Auteur(s) : Burgert Brothers, 1917- ( Photographer ) Résumé : When Henry B. Plant brought the railroad to Tampa in 1884, he opened the door for many businesses to locate and flourish here. The railroad was at the center of the city's economy. From downtown it went to Port Tampa where one could board a Plant steamship to Jamaica, Cuba, New Orleans, Bermuda or other destinations. A spur of the rail line brought the train up to the west front of the hotel so guests could depart the train and walk directly into the lobby.
The Tampa Bay Hotel cost approximately 2.5 million dollars to build and $500,000 to furnish. Consisting of 511 rooms, some of which were suites of 3-7 rooms, it provided a degree of luxury never before seen in Tampa. Most of the rooms had their own baths and all had electricity and telephones. In addition, guests were surrounded by a varied collection of furniture, porcelains, Venetian-style mirrors, and sculptures gathered by Mr. and Mrs. Plant in their travels in Europe.
The Tampa Bay Hotel opened in 1891 amid wide fanfare and celebration. Henry Plant's dream was now a reality. The newspapers of the day described it as "brightly illuminated, filled with sumptuous decorations, thrilling music and graced with turrets, domes and minarets towering heavenward and
glistening in the sun." It was a Victorian palace.
The hotel was a lively place with balls, tea parties, and organized hunts during the winter social season. It was open seasonally from December to April in the 1890's. Once a guest arrived at the hotel, he needed to be entertained. Guests went wild game hunting as well as fresh and salt-water fishing. Water sports were also included like sailing, rowing, and canoeing. For the less adventuresome, there were bicycles, carriages, and rickshaws to ride you around the property. The hotel also offered golf, tennis, shuffleboard, billiards, and even a racetrack. (Funding) Funded in part by the Institute for Museum and Library Services (IMLS), Ephemeral Cities Project. Tampa |z 1271000 |2 ceeus Hillsborough County |z 12057 |2 ceeus United States of America -- Florida -- Hillsborough County -- Tampa Droits : All rights reserved. 2005. D29-009 | Partager Voir aussi Hotel ( Building, Structures ) ( nmc ) Hotels ( lctgm ) Tampa Bay Hotel (West Lafayette and Hyde Park Avenue) ( lctgm ) Plant Park (West Lafayette Street opp Hyde Park Avenue) ( lctgm ) Rivers ( lctgm ) Hillsborough River ( lctgm ) Parks ( lctgm ) Piers and wharves ( lctgm ) Minarets ( lctgm ) Tampa Bay Hotel (Tampa, Fla.) -- Pictorial works -- 20th century ( lcsh ) |
Mise en place et exploitation des DCP en Martinique, aspects reglementaires et economiques Auteur(s) : Laisne, L Angelelli, P Éditeur(s) : Pêche thonière et dispositifs de concentration de poissons, Caribbean-Martinique, 15-19 Oct 1999 Résumé : Since the beginning of 1980, the Martinique fishermen have suffered a deep crisis. The traditional ways of fishing, based on benthic fish exploitation, have seen the decreasing of their profitability due to the over-fishing of the narrow continental shelf offering few resources. The pelagic fishery had become the professional main source of income. This fishery equally encounter difficulties: denied rights of access in the EEZ of Caribbean islands, expensive costs of exploitation. The disposal of FADs offers new ways to the Martinique fishermen. In 1999, it was decided the disposal of a onetworko of 30 permanent FADs around Martinique. The mooring of these FADs must be followed by legal and economic adapted measures to reach the desired aim: the development of local fishery economy through a sustainable fishing practice. Therefore, the French authorities have decided to make the regional fishermen committee responsible for the management of FADs.This committee is the only one to be entitled to moor and to deliver licences to FADs. This committee, gathering all the fishing industry representatives, has regarding the french law the right of mooring and delivering licences to the FADs access, collecting fishery statistics. These data should fund research to improve the management of the fishery, care and replace FADs. This programas realisation, as well as durability, need adequate financial planning. It has been included in the European commission financing program. This plans success will ensure the increase of the fishermen income, maintain and develop employment.Original Abstract: Apres une periode d'experimentation lancee localement au debut des annees quatre-vingt, les premiers resultats ont ete suffisamment probants pour conduire les professionnels a souhaiter l'implantation de dispositifs de concentration de poissons (dcp) en Martinique ou a les implanter eux-memes pour la capture des dorades coryphenes, des thons noirs, de l'albacore ou du listao. Le colloque international sur la peche thoniere et les dispositifs de concentration de poissons organise du 15 au 19 octobre 1999 en Martinique donne l'occasion de revenir sur le contexte, l'interet et les modalites de developpement de la technique des dcp en Martinique. Droits : info:eu-repo/semantics/openAccess http://archimer.ifremer.fr/doc/00042/15305/12639.pdf http://archimer.ifremer.fr/doc/00042/15305/ | Partager |
The Entrance Gates, Plant Park, the the Tampa Bay Hotel with it's unique minarets. Auteur(s) : Burgert Brothers, 1917- ( Photographer ) Résumé : When Henry B. Plant brought the railroad to Tampa in 1884, he opened the door for many businesses to locate and flourish here. The railroad was at the center of the city's economy. From downtown it went to Port Tampa where one could board a Plant steamship to Jamaica, Cuba, New Orleans, Bermuda or other destinations. A spur of the rail line brought the train up to the west front of the hotel so guests could depart the train and walk directly into the lobby.
The Tampa Bay Hotel cost approximately 2.5 million dollars to build and $500,000 to furnish. Consisting of 511 rooms, some of which were suites of 3-7 rooms, it provided a degree of luxury never before seen in Tampa. Most of the rooms had their own baths and all had electricity and telephones. In addition, guests were surrounded by a varied collection of furniture, porcelains, Venetian-style mirrors, and sculptures gathered by Mr. and Mrs. Plant in their travels in Europe.
The Tampa Bay Hotel opened in 1891 amid wide fanfare and celebration. Henry Plant's dream was now a reality. The newspapers of the day described it as "brightly illuminated, filled with sumptuous decorations, thrilling music and graced with turrets, domes and minarets towering heavenward and
glistening in the sun." It was a Victorian palace.
The hotel was a lively place with balls, tea parties, and organized hunts during the winter social season. It was open seasonally from December to April in the 1890's. Once a guest arrived at the hotel, he needed to be entertained. Guests went wild game hunting as well as fresh and salt-water fishing. Water sports were also included like sailing, rowing, and canoeing. For the less adventuresome, there were bicycles, carriages, and rickshaws to ride you around the property. The hotel also offered golf, tennis, shuffleboard, billiards, and even a racetrack. (Funding) Funded in part by the Institute for Museum and Library Services (IMLS), Ephemeral Cities Project. Tampa |z 1271000 |2 ceeus Hillsborough County |z 12057 |2 ceeus United States of America -- Florida -- Hillsborough County -- Tampa Lafayette Street Droits : All rights reserved. 2005. D20-008 | Partager |
La dynamique des pêches côtières du pays bigouden Auteur(s) : Charuau, Anatole Résumé : In the beginning, the coastal fleet of the Bigouden region fished by trawling and was completely focused on exploiting lobster and hake. It is a traditional business that expanded between the last war and the 70s, reaching its peak between 1975 and 1980.
The best image to give an idea of this fleet is that of a "bucket waterwheel" endlessly discharging its catch in the four ports of the Guilvinec district. Where there is a seafaring business in Guilvinec, Loctudy and Saint-Guénolé, there is a complementarity that is expressed in two ways:
- coastal fishing constitutes a very noticeable and regular supplement to production, since sales happen daily and only bad winter weather causes a relative decrease in the supplement. - coastal fishing gives a flattering image of the port based on the display of high-quality leading market products: daily live lobster, hake and angler.
In this study, we have above all tried to evaluate the situation of the Bigouden coastal system as an entity, while including in the same analysis the species, fleets and the exploitation of the resource. For the main species, a balance sheet is proposed. It covers the lobster, hake and angler separately. Lobster, because of its small amount of movement, can be considered as being an isolated stock, while fish belong to much more wide-ranging groups.
The lobster has gained from various increases in meshing that have been imposed since 1971, even if these have not always been strictly applied. One of the results of this management by means of meshing is a "depreciation" of the variations of daily yields around an average value of 100kg.
For the hake, the dominant trait is an increase in yields in the last few years in accordance with an improvement of the situation in the Gulf of Gascony due to a generalised decrease of effort and a modification of the exploitation profile since the appearance of boulters and straight nets. Whereas the situation for lobster fisheries, as regards the hake's marketable size, did not improve, since the demand for small hake still exists, we have nonetheless been witnessing for about ten years a slow diversification of the fleets' business activities, which is much more in line with sequential hake fisheries' logical outline of exploitation. When lobster yields decrease, one part of the fleet focuses on the fish at the edges of the lobster fisheries.
For the angler, we see rather similar phenomena and a significant increase in unloading of the two species by lobster fishermen due also to a widening of their fishing areas. On the lobster mudflats themselves, there is no notable change in exploitation in the historical records. All studies of coastal fishing always come up against the problem of acquiring statistical data and the Bigouden region is no exception to the rule.
To improve this situation, in 1987 and 1988 two items were chosen:
- a better awareness of the activity and of the areas frequented, by survey during unloading in Guilvinec and in Loctudy.
- a detailed description of the haul by species, by sampling, in Loctudy, on two-thirds of coastal sales, between December 1987 and November 1988.
For this reason, analysis of fleets by type is still cursory and covers only one year. The appearance of new trends towards fish can only be described qualitatively, since there is no historical record. The classification of boats was done by analysing data furnished by the auctions. This first assessment is not necessarily reliable, above all because of the auctions' inaccurate description of the hauls, a deficiency that we have tried to overcome by surveying in Loctudy.
In conclusion, we are witnessing in the Bigouden region, as in other entities, a rebalancing between traditional business activities and modern trends. Lobster fishing, almost exclusive before the 1980s, is tending to decrease for two main reasons:
- a generalised decrease in activity in the lobster fisheries due to non-renewal of coastal fish fleets,
- The transfer of part of the lobster fishermen's activities to fish, since the lobster and its accompanying catch no longer seemed able to insure the economic viability of new ships.
Other maritime districts resolved their lobster problem in a different way. The Lorient fishermen improved their yields by using more capable trawlers, the fishermen of Sable by exploiting the hake fish run to the fullest and limiting their lobster fishing to the best season. The Bigouden region is slowly turning to the second solution, as it renews its fleet.
A ses origines, la flottille côtière du pays bigouden péchant au chalut, est tout entière orientée vers l'exploitation de la langoustine et du merlu. Il s'agit d'une activité traditionnelle qui s' amplifie entre la dernière guerre et les années 70 pour atteindre son apogée entre 1975 et 1980. La meilleure image que l'on puisse donner de cette flottille est celle d'une "noria" débarquant inlassablement sa capture dans les quatre ports du quartier du Guilvinec. Là où existe une activité hauturière à Guilvinec, Loctudy et Saint-Guénolé, il y a une complémentarité qui s'exprime de deux manières : - la pêche côtière constitue un appoint très appréciable et régulier de production, puisque la vente est quotidienne et que seules les intempéries hivernales entraînent une baisse relative des apports. - la pêche côtière donne du port une image flatteuse basée sur la présentation de produits d'appel de grande qualité : langoustine vivante, merlu et baudroies quotidiens. Dans cette étude, nous avons surtout tenté de faire le point sur le système côtier bigouden en tant qu'entité, en englobant dans la même analyse des espèces, les flottilles et l'exploitation de la ressource. Pour les espèces principales, un bilan est proposé. Il couvre séparément la langoustine, le merlu et les baudroies. La langoustine, en raison de ses faibles déplacements, peut être considérée comme constituant un stock isolé, alors que les poissons appartiennent à des ensembles beaucoup plus vastes. La langoustine a beaucoup gagné des diverses augmentations de maillage qui ont été imposées depuis 1971, même si elles n'ont pas toujours été appliquées avec rigueur. Un des résultats de cette gestion par les maillages est un "amortissement" des variations des rendements journaliers autour d'une valeur moyenne de 100 kg. Pour le merlu, le trait dominant est une augmentation des rendements dans les dernières années en accord avec une amélioration de la situation dans le Golfe de Gascogne due à une baisse généralisée de l'effort et à une modification du profil d'exploitation depuis l'apparition des palangriers et des filets droits. Si la situation sur les pêcheries de langoustine, au regard de la taille marchande du merlu, ne s'est pas améliorée puisque la demande de petits merluchons existe toujours, on assiste par contre depuis une dizaine d'années à une diversification lente des activités des flottilles entrant beaucoup mieux dans le schéma logique d'exploitation des pêcheries séquentielles de merlu. Quand les rendements en langoustine baissent, une partie de la flottille s'oriente vers les poisson sur les marges des pêcheries de langoustine. Pour les baudroies on observe des phénomènes assez analogues et une augmentation importante des débarquements des deux espèces par les langoustiniers due également à un élargissement de leurs zones de pêche. Sur les vasières à langoustine elles-mêmes, il n'y a pas de modification notable de l'exploitation dans la série historique. Toute étude des pêches côtières se heurte toujours au problème d'acquisition des données statistiques et le pays bigouden n'échappe pas à la règle. Pour améliorer cette situation, en 1987 et 1988, deux points ont été retenus : - une meilleure connaissance de l'effort et des zones fréquentées, par enquête au moment des débarquements à Guilvinec et à Loctudy, - une description détaillée des apports par espèce, par échantillonnage, à Loctudy, sur les 2/3 des ventes côtières, entre décembre 1987 et novembre 1988. Pour cette raison, l'analyse de flottilles en types est encore sommaire et n'a porté que sur une année. L'apparition des tendances nouvelles vers le poisson ne peut être décrite que qualitativement puisque la série historique n'existe pas. La classification des bateaux a été faite par l'analyse des données fournies par les criées. Ce premier diagnostic ne présente pas toutes les garanties en raison surtout d'une description peu fidèle des apports par les criées, déficience que l'on a essayé de pallier en enquêtant à Loctudy. En conclusion, on assiste dans le pays bigouden comme dans d'autres entités à un rééquilibrage entre les activités traditionnelles et des orientations modernes. La pêche de langoustine, quasi exclusive avant les années 1980, tend à décroître pour deux raisons principales : - une baisse généralisée de l'effort sur les pêcheries de langoustine due au nonrenouvellement des flottilles de pêche côtière, - le report d'une partie de l'effort des langoustiniers vers les pêcheries de poissons, la langoustine et sa capture accessoire ne semblant plus pouvoir assurer la rentabilité économique des navires neufs. D'autres quartiers maritimes ont résolu de façon différente leur problème langoustine. Les Lorientais ont amélioré leurs rendements en adoptant des chaluts plus performants, les Sablais en exploitant à fond la séquence des pêcheries de merlu et en limitant leur intervention sur la langoustine à la saison la plus favorable. Le pays bigouden s'engage lentement dans la seconde solution, au rythme du renouvellement de sa flottille. Droits : info:eu-repo/semantics/openAccess http://archimer.ifremer.fr/doc/1989/rapport-2202.pdf http://archimer.ifremer.fr/doc/00000/2202/ | Partager Voir aussi France Brittany Data Fishing zone Fleet Trawling Commercial species Costal fisheries Finistere Bretagne Télécharger |
Complexities and Uncertainties in Transitioning Small-Scale Coral Reef Fisheries Auteur(s) : Leenhardt, Pierre Lauer, Matthew Madi Moussa, Rakamaly , Holbrook, S. J. Rassweiler, Andrew Schmitt, Russell J. Claudet, Joachim Auteurs secondaires : Laboratoire d'Excellence CORAIL (LabEX CORAIL) ; Institut de Recherche pour le Développement (IRD) - Université des Antilles et de la Guyane (UAG) - École des hautes études en sciences sociales (EHESS) - École pratique des hautes études (EPHE) - Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) - Université de la Réunion (UR) - Université de la Polynésie Française (UPF) - Université de Nouvelle Calédonie - Institut d'écologie et environnement Centre de recherches insulaires et observatoire de l'environnement (CRIOBE) ; Université de Perpignan Via Domitia (UPVD) - École pratique des hautes études (EPHE) - Centre National de la Recherche Scientifique (CNRS) Department of Anthropology [San Diego] ; University of California [San Diego] (UC San Diego) Department of Ecology, Evolution and Marine Biology ; University of California [Santa Barbara] Coastal Research Center, Marine Science Institute ; University of California [Santa Barbara] Department of Biological Science [Tallahassee] ; Florida State University [Tallahassee] (FSU) Éditeur(s) : HAL CCSD Frontiers Media Résumé : International audience Coral reef fisheries support the development of local and national economies and are the basis of important cultural practices and worldviews. Transitioning economies, human development, and environmental stress can harm this livelihood. Here we focus on a transitioning social-ecological system as a case study (Moorea, French Polynesia). We review fishing practices and three decades of effort and landing estimates with the broader goal of informing management. Fishery activities in Moorea are quite challenging to quantify because of the diversity of gears used, the lack of centralized access points or markets, the high participation rates of the population in the fishery, and the overlapping cultural and economic motivations to catch fish. Compounding this challenging diversity, we lack a basic understanding of the complex interplay between the cultural, subsistence, and commercial use of Moorea's reefs. In Moorea, we found an order of magnitude gap between estimates of fishery yield produced by catch monitoring methods (2 t km −2 ∼ year −1) and estimates produced using consumption or participatory socioeconomic consumer surveys (∼24 t km −2 year −1). Several lines of evidence suggest reef resources may be overexploited and stakeholders have a diversity of opinions as to whether trends in the stocks are a cause for concern. The reefs, however, remain ecologically resilient. The relative health of the reef is striking given the socioeconomic context. Moorea has a relatively high population density, a modern economic system linked into global flows of trade and travel, and the fishery has little remaining traditional or customary management. Other islands in the Pacific in similar contexts in Polynesia such as Hawaii, that continue to develop economically, may have small-scale fisheries that increasingly resemble Moorea. Therefore, understanding Moorea's reef fisheries may provide insight into their future. ISSN: 2296-7745 Droits : http://creativecommons.org/licenses/by/ hal-01325804 https://hal-univ-perp.archives-ouvertes.fr/hal-01325804 https://hal-univ-perp.archives-ouvertes.fr/hal-01325804/document https://hal-univ-perp.archives-ouvertes.fr/hal-01325804/file/fmars-03-00070.pdf DOI : 10.3389/fmars.2016.00070 | Partager |
An Early view of the Tampa Bay Hotel. Auteur(s) : Burgert Brothers, 1917- ( Photographer ) Résumé : When Henry B. Plant brought the railroad to Tampa in 1884, he opened the door for many businesses to locate and flourish here. The railroad was at the center of the city's economy. From downtown it went to Port Tampa where one could board a Plant steamship to Jamaica, Cuba, New Orleans, Bermuda or other destinations. A spur of the rail line brought the train up to the west front of the hotel so guests could depart the train and walk directly into the lobby.
The Tampa Bay Hotel cost approximately 2.5 million dollars to build and $500,000 to furnish. Consisting of 511 rooms, some of which were suites of 3-7 rooms, it provided a degree of luxury never before seen in Tampa. Most of the rooms had their own baths and all had electricity and telephones. In addition, guests were surrounded by a varied collection of furniture, porcelains, Venetian-style mirrors, and sculptures gathered by Mr. and Mrs. Plant in their travels in Europe.
The Tampa Bay Hotel opened in 1891 amid wide fanfare and celebration. Henry Plant's dream was now a reality. The newspapers of the day described it as "brightly illuminated, filled with sumptuous decorations, thrilling music and graced with turrets, domes and minarets towering heavenward and glistening in the sun." It was a Victorian palace.
The hotel was a lively place with balls, tea parties, and organized hunts during the winter social season. It was open seasonally from December to April in the 1890's. Once a guest arrived at the hotel, he needed to be entertained. Guests went wild game hunting as well as fresh and salt-water fishing. Water sports were also included like sailing, rowing, and canoeing. For the less adventuresome, there were bicycles, carriages, and rickshaws to ride you around the property. The hotel also offered golf, tennis, shuffleboard, billiards, and even a racetrack. (Funding) Funded in part by the Institute for Museum and Library Services (IMLS), Ephemeral Cities Project. Tampa |z 1271000 |2 ceeus Hillsborough County |z 12057 |2 ceeus United States of America -- Florida -- Hillsborough County -- Tampa Droits : All rights reserved. 2005. D29-014 | Partager |
The significant contribution of FADs to Solomon Taiyo Limited's fishing operations Auteur(s) : Sibisopere, M Éditeur(s) : Pêche thonière et dispositifs de concentration de poissons, Caribbean-Martinique, 15-19 Oct 1999 Résumé : From 1972, when Solomon Taiyo Limited (stl) started a pole-and-line fishing operation, to 1980, stl vessels had been catching tuna almost exclusively from surface free-swimming schools. In 1981, a fad programme group purse-seining fishing operation, using the Filipino "payao" model, was put in place. Results were excellent and STL vessels quickly adapted their fishing methods to make the best use of fads. STL slightly modified the original payao design to better suit its own needs and nowadays, about 90% of the group purse seine catch, i.e. 5,800 t annually, and around 60-70% of the pole-and-line catch, i.e. about 15,000 t annually, come from fad fishing. fads bring benefits not only to stl but also to the rural communities of the region. For stl, it allows savings on the operational costs, especially those of pole-and-line fishing operations, reduction of searching time and a better regularity of fish landings. For the rural communities, it gives better returns to bait-ground owners through royalties paid by stl for their baitfishing boats and it allows local fishing communities (known as canoe-fishermen) to increase their catches using fishing methods (artisanal) such as trolling and midwater handlines set around fads. This provides fish for family consumption and a source of income from fish sold. Overall, the importance of fads to stl's fishing operation, and therefore to the local economy as a whole, is high, although no precise value can be attached to it. Droits : info:eu-repo/semantics/openAccess http://archimer.ifremer.fr/doc/00042/15307/12643.pdf http://archimer.ifremer.fr/doc/00042/15307/ | Partager |
Developpement de la peche de grands pelagiques dans les antilles francaises et organisation du marche des produits de la mer Auteur(s) : Lantz, Frederic Résumé : The development of large pelagic fishing in the French Antilles is an integral part of a difficult economic situation of the fishing sector in Martinique where this development can seem like a solution to increasingly acute problems. Indeed, for the regulatory authorities as well as for many participants in the sector, it is imperative to find solutions to the lack of profitability of a part of the fishing ships and to confront the regular increase of the share of imports in supplying Martinique with seafood. This question about the possibilities of developing large pelagic fishing is not new since it is already mentioned in the Notice from the Economic and Social Committee of the Martinique Region in 1982. We will not show in this document a detailed analysis of small-scale fishing in Martinique. Since the latter has been abundantly studied by the team of the Caribbean Oceanological and Halieutic Research Centre (PROHC) between 1985 and 1987, we will take up these principal conclusions (with which we are in full agreement) and bring them up to date based on data collected during our mission from 11 to 24 April 1988. The first section devoted to the supply structure (local fishing and imports) will attempt to define under what conditions large pelagic fishing can be developed. The second section will address marketing and demand. Indeed, at the same time as the problems of developing large pelagic fishing, we are faced with the question of the organisation of seafood markets. This organisation is a fundamental issue for the small-scale fishing sector in the French Antilles since its long-term future depends upon it by setting different prices and amounts exchanged according to the structure it is given. We will come to a conclusion on the economic conditions of developing a large pelagic fishery and organising a market, this based on research and study work already done. We will indicate which investigations must be conducted to complete the set of factors for decision support in this area. To perform this assessment, we reconstructed from the long series 1970-1986 (sometimes with significant inadequacies): these are presented as an appendix. (OCR non controlé) Le développement de la pêche de grands pélagiques dans les Antilles Françaises s'inscrit dans un contexte économique difficile du secteur de la pêche en Martinique où ce développement peut apparaître comme une solution à des problèmes de plus en plus aigus. En effet, pour les autorités de tutelle ainsi que pour de nombreux intervenants dans le secteur, il est impératif de trouver des solutions au manque de rentabilité d'une partie des unités de pêche et de faire face à l'augmentation régulière de la part des importations dans l'approvisionnement de la Martinique en produits de la mer. Cette question sur les possibilités d'un développement de la pêche de grands pélagiques n'est pas nouvelle puisqu'elle est déjà évoquée dans l'Avis du Comité Economique et Social de la Région Martinique en 1982. On ne présentera pas dans ce document une analyse détaillée de la pêche artisanale en Martinique. Celle-ci ayant été abondamment étudiée par l'équipe du Pôle de Recherche Océanologique et Halieutique Caraïbe (PROHC) entre 1985 et 1987, on reprendra ces principales conclusions (avec lesquelles nous sommes en plein accord) en les actualisant à partir des informations recueillies lors de notre mission du 11 au 24 avril 1988. La première section consacrée à la structure d'offre (pêche locale et importations) s'attachera à définir dans quelles conditions peut être développée une pêche de grands pélagiques. Là seconde section traitera de la commercialisation et de la demande. En effet parallèlement aux problèmes de développement d'une pêche de grands pélagiques, se pose la question de l'organisation du marché des produits de la mer. Cette organisation est un enjeu primordial pour le secteur de la pêche artisanale dans les Antilles Françaises puisqu'elle conditionne son avenir à long terme en définissant des prix et des quantités échangées différents suivant la structure qu'on lui donne. On conclura sur les conditions économiques du développement d'une pêche de grands pélagiques et de l'organisation d'un marché, ceci à partir des travaux de recherche et des études déjà réalisés. On indiquera quelles investigations doivent être menées pour compléter l'ensemble des éléments d'aide à la décision dans ce domaine. Pour effectuer cette évaluation, on a reconstituer des séries longues 1970-1986 (parfois avec des carences importantes) : celles-ci sont présentées en annexe. Droits : info:eu-repo/semantics/openAccess http://archimer.ifremer.fr/doc/1988/rapport-2519.pdf http://archimer.ifremer.fr/doc/00000/2519/ | Partager |
Fish, fishers, seals and tourists: Economic consequences of creating a marine reserve in a multi-species, multi-activity context Auteur(s) : Boncoeur, Jean Alban, Frederique Guyader, Olivier Thebaud, Olivier Éditeur(s) : Wiley Résumé : This paper investigates some economic consequences of creating a marine reserve on both fishing and ecotourism, when the range of controllability of fishing effort is limited and the impact of the reserve on ecosystem is considered. The issue is illustrated by the example of creating a no-take zone in part of a region where fishing is managed through a limited entry license system, and which is inhabited by two interacting stocks: a stock of prey (fish) and a stock of predators (seals). While the former is targeted by commercial fishing, the latter is not subject to harvest but is a potential basis for a commercial non-extractive activity (seal watching). Analysis is conducted with the help of a bioeconomic model combining the features of marine reserve modeling and of multispecies modeling. Following a description of the model, results of several simulation runs are presented. These show that creating a marine reserve has more complex economic implications than predicted in studies focused exclusively on one stock and/or commercial fisheries. More specifically, the model shows that the dynamics of the two interacting stocks reduces the benefits of the no-take zone for the fishing industry, while it makes the creation of this zone provide an opportunity for the development of ecotourism. Due to this dynamics, the model suggests that the optimal size of the reserve is larger when ecotourism is taken into account along with fishing activities. Natural Resource Modeling (1939-7445) (Wiley), 2002-12 , Vol. 15 , N. 4 , P. 387–411 Droits : 2002 Rocky Mountain Mathematics Consortium http://archimer.ifremer.fr/doc/00244/35506/34010.pdf DOI:10.1111/j.1939-7445.2002.tb00095.x http://archimer.ifremer.fr/doc/00244/35506/ | Partager |
The Tampa Bay Hotel upon it's completion,1892. Auteur(s) : Burgert Brothers, 1917- ( Photographer ) Résumé : When Henry B. Plant brought the railroad to Tampa in 1884, he opened the door for many businesses to locate and flourish here. The railroad was at the center of the city's economy. From downtown it went to Port Tampa where one could board a Plant steamship to Jamaica, Cuba, New Orleans, Bermuda or other destinations. A spur of the rail line brought the train up to the west front of the hotel so guests could depart the train and walk directly into the lobby.
The Tampa Bay Hotel cost approximately 2.5 million dollars to build and $500,000 to furnish. Consisting of 511 rooms, some of which were suites of 3-7 rooms, it provided a degree of luxury never before seen in Tampa. Most of the rooms had their own baths and all had electricity and telephones. In addition, guests were surrounded by a varied collection of furniture, porcelains, Venetian-style mirrors, and sculptures gathered by Mr. and Mrs. Plant in their travels in Europe.
The Tampa Bay Hotel opened in 1891 amid wide fanfare and celebration. Henry Plant's dream was now a reality. The newspapers of the day described it as "brightly illuminated, filled with sumptuous decorations, thrilling music and graced with turrets, domes and minarets towering heavenward and glistening in the sun." It was a Victorian palace.
The hotel was a lively place with balls, tea parties, and organized hunts during the winter social season. It was open seasonally from December to April in the 1890's. Once a guest arrived at the hotel, he needed to be entertained. Guests went wild game hunting as well as fresh and salt-water fishing. Water sports were also included like sailing, rowing, and canoeing. For the less adventuresome, there were bicycles, carriages, and rickshaws to ride you around the property. The hotel also offered golf, tennis, shuffleboard, billiards, and even a racetrack. (Funding) Funded in part by the Institute for Museum and Library Services (IMLS), Ephemeral Cities Project. Tampa |z 1271000 |2 ceeus Hillsborough County |z 12057 |2 ceeus United States of America -- Florida -- Hillsborough County -- Tampa Droits : All rights reserved. 2005. D29-0015 | Partager |
A Large sailboat sits on the Hillsborough River near the pier for the Tampa Bay Hotel. Auteur(s) : Burgert Brothers, 1917- ( Photographer ) Résumé : When Henry B. Plant brought the railroad to Tampa in 1884, he opened the door for many businesses to locate and flourish here. The railroad was at the center of the city's economy. From downtown it went to Port Tampa where one could board a Plant steamship to Jamaica, Cuba, New Orleans, Bermuda or other destinations. A spur of the rail line brought the train up to the west front of the hotel so guests could depart the train and walk directly into the lobby.
The Tampa Bay Hotel cost approximately 2.5 million dollars to build and $500,000 to furnish. Consisting of 511 rooms, some of which were suites of 3-7 rooms, it provided a degree of luxury never before seen in Tampa. Most of the rooms had their own baths and all had electricity and telephones. In addition, guests were surrounded by a varied collection of furniture, porcelains, Venetian-style mirrors, and sculptures gathered by Mr. and Mrs. Plant in their travels in Europe.
The Tampa Bay Hotel opened in 1891 amid wide fanfare and celebration. Henry Plant's dream was now a reality. The newspapers of the day described it as "brightly illuminated, filled with sumptuous decorations, thrilling music and graced with turrets, domes and minarets towering heavenward and glistening in the sun." It was a Victorian palace.
The hotel was a lively place with balls, tea parties, and organized hunts during the winter social season. It was open seasonally from December to April in the 1890's. Once a guest arrived at the hotel, he needed to be entertained. Guests went wild game hunting as well as fresh and salt-water fishing. Water sports were also included like sailing, rowing, and canoeing. For the less adventuresome, there were bicycles, carriages, and rickshaws to ride you around the property. The hotel also offered golf, tennis, shuffleboard, billiards, and even a racetrack. (Funding) Funded in part by the Institute for Museum and Library Services (IMLS), Ephemeral Cities Project. Tampa |z 1271000 |2 ceeus Hillsborough County |z 12057 |2 ceeus United States of America -- Florida -- Hillsborough County -- Tampa Droits : All rights reserved. 2005. | Partager Voir aussi Hotel ( Building, Structures ) ( nmc ) Tampa Bay Hotel (West Lafayette and Hyde Park Avenue) ( nmc ) Hotels ( lctgm ) Plant Park (West Lafayette Street opp Hyde Park Avenue) ( lctgm ) Parks ( lctgm ) Plant Park (Tampa, Fla.) â Photographs ( lcsh ) Rivers ( lctgm ) Hillsborough River ( lctgm ) Sailboats ( lctgm ) Minarets ( lctgm ) |
A View of the early grounds of the Tampa Bay Hotel and the railroad track running directly to the main entrance. Auteur(s) : Burgert Brothers, 1917- ( Photographer ) Résumé : When Henry B. Plant brought the railroad to Tampa in 1884, he opened the door for many businesses to locate and flourish here. The railroad was at the center of the city's economy. From downtown it went to Port Tampa where one could board a Plant steamship to Jamaica, Cuba, New Orleans, Bermuda or other destinations. A spur of the rail line brought the train up to the west front of the hotel so guests could depart the train and walk directly into the lobby.
The Tampa Bay Hotel cost approximately 2.5 million dollars to build and $500,000 to furnish. Consisting of 511 rooms, some of which were suites of 3-7 rooms, it provided a degree of luxury never before seen in Tampa. Most of the rooms had their own baths and all had electricity and telephones. In addition, guests were surrounded by a varied collection of furniture, porcelains, Venetian-style mirrors, and sculptures gathered by Mr. and Mrs. Plant in their travels in Europe.
The Tampa Bay Hotel opened in 1891 amid wide fanfare and celebration. Henry Plant's dream was now a reality. The newspapers of the day described it as "brightly illuminated, filled with sumptuous decorations, thrilling music and graced with turrets, domes and minarets towering heavenward and glistening in the sun." It was a Victorian palace.
The hotel was a lively place with balls, tea parties, and organized hunts during the winter social season. It was open seasonally from December to April in the 1890's. Once a guest arrived at the hotel, he needed to be entertained. Guests went wild game hunting as well as fresh and salt-water fishing. Water sports were also included like sailing, rowing, and canoeing. For the less adventuresome, there were bicycles, carriages, and rickshaws to ride you around the property. The hotel also offered golf, tennis, shuffleboard, billiards, and even a racetrack. (Funding) Funded in part by the Institute for Museum and Library Services (IMLS), Ephemeral Cities Project. Tampa |z 1271000 |2 ceeus Hillsborough County |z 12057 |2 ceeus United States of America -- Florida -- Hillsborough County -- Tampa Droits : All rights reserved. 2005. | Partager |
Global warming and the collapse of theFrench Guiana shrimp fishery Auteur(s) : Diop, Bassirou Sanz, Nicolas Duplan, Yves Jamont Junior Guene, Elhadji Mama Blanchard, Fabian Doyen, Luc Pereau, Jean-Christophe Auteurs secondaires : Centre de Recherche en Economie, Gestion, Modélisation et Informatique Appliquée (CEREGMIA) ; Université des Antilles et de la Guyane (UAG) Institut de Physique de Rennes (IPR) ; Université de Rennes 1 (UR1) - Centre National de la Recherche Scientifique (CNRS) Ifremer, Unité Biodiversité Halieutique de Guyane ; Unité Biodiversité Halieutique de Guyane Groupe de Recherche en Economie Théorique et Appliquée (GREThA) ; Université de Bordeaux (UB) - Centre National de la Recherche Scientifique (CNRS) Éditeur(s) : HAL CCSD Résumé : This paper studies the biological and economic effects of globalwarming on the French Guiana shrimp fishery. The sea surface tem-perature is explicitly introduced into four natural growth functions,among which the Cobb-Douglas function best adjusts the availabledata. Besides, a Cobb-Douglas harvest function is also estimated, in-dicating that shrimp production in French Guiana is highly sensitive tothe shrimp stock, which implies that global warming may have strongeconomic implications. We nally consider a centralized resource man-agement of the French Guiana shrimp shery, that is undertaken invarious trend scenarios concerning the sea surface temperature. Un-der the most plausible scenario, in which the sea surface temperaturefollows the trend of the last decades, pro ts and biomass respectivelydecrease and collapse around the end of the 2020s. https://hal.univ-antilles.fr/hal-01243305 hal-01243305 https://hal.univ-antilles.fr/hal-01243305 https://hal.univ-antilles.fr/hal-01243305/document https://hal.univ-antilles.fr/hal-01243305/file/Diop%20et%20al.%20%282015%29.pdf | Partager |
Changement climatique, conséquences potentielles pour la biodiversité ichthyologique et pour la pêche côtière en Guyane française entre 1970 et 2005 Auteur(s) : Bernard, Caroline Résumé : Preliminary analysis of the impact of an environmental change on ichtyologic fauna marinates and fishing in Guyanese water enter within the framework of the program CHALOUPE (dynamic Change of the exploited marine biodiversity and the viability of the Fisheries) coordinated by Ifremer Cayenne and financed by the ANR (National Agency of Research). The study focuses on:
-analysis temporal variations of various environmental parameters (sea surface temperature and salinity, the phenomenon El Niño)
-fish physical characteristics (tolerances of temperature and salinity, maximum height, distribution…)
- analysis of the unloadings per unit of effort of the inshore fishing and an economic analysis of the selling price of fish
Data are found on data bases and are given by scientists. The statistical studies and the cartographic representations show that there is an increase in temperature of water in Guiana since the end of the Nineties. The model AquaMaps® simulates the potential consequences of this reheating on the fish distribution. Certain stocks of fishing are weakened. For the moment, if the composition of the captures of inshore fishing changes, that seems more due to a change of fishing strategy than due to an impact of the climatic change. In addition, the average value of the capture increased for reason commercial. Les analyses de l’impact d’un changement environnemental sur la faune ichtyologique marine et la pêche dans les eaux guyanaises entrent dans le cadre du programme CHALOUPE (CHAngement gLObal, dynamiqUe de la biodiversité marine exploitée et de la viabilité des Pêcheries) coordonné par l’Ifremer Cayenne et financé par l’ANR (Agence Nationale de la Recherche). L’étude porte sur : -l’analyse des variations temporelles de différents paramètres environnementaux (température et salinité de surface des eaux, le phénomène El Niño) à l’échelle de quelques décennies -les caractéristiques physiques des poissons (tolérances de températures et de salinité (taille maximum, répartition…) ; -l’analyse des débarquements par unité d’effort de la pêche côtière depuis les années 70 ; -une analyse économique de la pêche ; Les données sont récoltées à partir de bases de données et au près de différents chercheurs. Les études statistiques et les représentations cartographiques démontrent qu’il y a bien une augmentation de température des eaux en Guyane depuis la fin des années 90. Le modèle statistique sous AquaMaps® permet de simuler les conséquences potentielles de ce réchauffement sur la répartition des poissons. Dans un tel contexte, certains stocks de pêche sont fragilisés. Pour le moment, si la composition des captures de la pêche côtière se modifie dans le même temps, cela semble plus du fait de changement de stratégie de pêche que du fait de l’impact du changement climatique. Par ailleurs, la valeur moyenne de la capture a augmenté pour des raisons commerciales. Droits : 2006 Ifremer http://archimer.ifremer.fr/doc/00077/18855/16429.pdf http://archimer.ifremer.fr/doc/00077/18855/ | Partager |
A cost-benefit analysis of improving trawl selectivity in the case of discards: The Nephrops norvegicus fishery in the Bay of Biscay Auteur(s) : Macher, Claire Guyader, Olivier Talidec, Catherine Bertignac, Michel Éditeur(s) : Elsevier Résumé : The Nephrops trawl fishery is one of the most important fisheries in the Bay of Biscay. The fishery management essentially relies on conservation measures, a total at I owed catch (TAC) for Nephrops together with a mini mum landing size (MLS) and minimum trawl mesh size (70 mm stretched mesh). These measures have failed to prevent high discard levels of many species that characterize the fishery. Nephrops trawlers thus discard about half of their Nephrops catches in numbers (a third in weight) of which only 30% survive. Nephrops discards mainly occur in younger Nephrops age groups below the MLS. This is a waste for the already overexploited Nephrops stock as well as for the fleet. Based on a bio-economic simulation model, the paper analyses the consequences of several scenarios of improving Nephrops selectivity. The potential impacts of these scenarios on Nephrops biomass, landings, discards and economic indicators (e.g. rent) are examined and a cost-benefit analysis of each scenario is carried out. We show that a better exploitation pattern would benefit fisheries that have high level of discards. Reducing non-commercial Nephrops discards leads to positive net present values of rent with better value realized from the production potential and limited short-term losses for the fishing units. By taking account of the economic dynamics of increasing effort however, we show that selectivity measures are insufficient. Regulating access to the fishery is also required to ensure the sustainability of the fishery and a better exploitation of the production potential. (C) 2008 Elsevier B.V. All rights reserved. Fisheries Research (0165-7836) (Elsevier), 2008-07 , Vol. 92 , N. 1 , P. 76-89 Droits : 2008 Elsevier B.V. All rights reserved. http://archimer.ifremer.fr/doc/2008/publication-4478.pdf DOI:10.1016/j.fishres.2007.12.021 http://archimer.ifremer.fr/doc/00000/4478/ | Partager Voir aussi Fisheries management Discards Selectivity Cost benefit analysis Bio economic simulations Nephrops norvegicus Télécharger |
Inventaire des plantes introduites en Méditerranée : origines et répercussions sur l'environnement et les activités humaines Auteur(s) : Verlaque, M Éditeur(s) : Gauthier-Villars Résumé : This review addresses the problem of recently introduced plants in the Mediterranean in order to analyse their vectors, the dispersal processes and the possible ecological and economic consequences. Ninety-five cases (94 macroscopic algae and one seagrass) are listed and discussed. Three major routes of access into the Mediterranean are indicated: shipping, the Suez canal and aqua-culture. The recent introduction of Caulerpa taxifolia along our coasts has called attention to a new potential source: aquaria. Among the successful acclimatizations, cold-temperate Pacific and Atlantic species remain confined to the north of the Mediterranean (Gulf of Lions, Adriatic), whereas some tropical or sub-tropical plants colonize large areas. Some introduced algae proliferate to the detriment of the indigenous Mediterranean vegetation. In contrast with some terrestrial introductions, no population crash has been observed in the Mediterranean, although some notable fluctuations seem to occur in coastal lagoons. From an economic point of view, the two activities most affected by this phenomenon are aquaculture and fishing. With the gradual disappearance of European frontiers, the worldwide development of marine cultures and the multiplication of giant Seaworlds, the transfer of live marine organisms will become routine and the risk of new introductions will considerably increase in the Mediterranean. Only international legislation, established by the countries of the littoral, will be able to control these problems. Oceanologica Acta (0399-1784) (Gauthier-Villars), 1994 , Vol. 17 , N. 1 , P. 1-23 Droits : info:eu-repo/semantics/openAccess http://archimer.ifremer.fr/doc/00098/20879/18493.pdf http://archimer.ifremer.fr/doc/00098/20879/ | Partager Voir aussi MEDITERRANEAN INTRODUCED SPECIES MARINE ALGAE SEAGRASSES ECOLOGICAL AND ECONOMIC CONSEQUENCES Télécharger |
Les pêcheries mixtes de langoustine et de merlu du golfe de Gascogne. Description, préparation à une modélisation et à une simulation des procédures de gestion Auteur(s) : Charuau, Anatole Ifremer Résumé : 1 - Study's goals review The management of Norway Lobster and Hake fisheries can be considered as the most important issue in the Gascogne gulf. Calculation methods used to evaluate prediction variations under various efforts and mesh constraints all pinpoint to the crucial role narrow mesh fishing plays in Hakes' Northern stock status. The involvement of Gascogne gulf Norway Lobster fisheries regarding Hakes over exploitation seems over dimensioned when comparing the size of both of these stocks. Hake stocks spread from Northern Great Britain to Northern Spain, while Norway Lobster stocks are located in the Gascogne gulf's mud flats. The biological solution is well known and consists in globally increasing mesh nets to 80mm which would bring up Hakes yield to its most. It would be unreal to pretend all parties involved in Hake stocks will come to use them. For now, it is mostly an economical issue since many vessels continue on with an exploitation scheme dating from the 60's and fish on coastal mud flats which are the most exploited zones and where their catch is detrimental to juvenile class Hakes and Norway Lobsters. Considering our limited time, this study will cover bio- economical modelisation preparation. You will therefore find a description of fisheries and an exploitation assessment based on 1986's available data.
2 - Accomplished work
2. 1 Fishery description
Presenting the problems and preparing ulterior analyses was first and foremost. Norway Lobster vessels supposedly, according to evaluation models used, test immature Hakes in such a manner that all stock exploitation is jeopardized. Norway Lobster distribution is closely linked to the nature of the ocean floor since it can only build its habitat on fine sediment. Hakes' habitat is not as restrictive and is linked to food supply, especially euphausiid shrimps, so they can be found on sandy and sandy-sedimental floors. Norway Lobsters are sought by a fleet of 400 to 450 ships which characteristics widely vary according to their home port. On the northern part, fisheries are close to exploitation ports where Norway Lobsters and miscellaneous catch yield is sufficient to support an older fleet. On the southern part, the structure is diversified and flexibility usually rules, more modern vessels can easily switch their target on a seasonal or daily basis. Globally, Hakes' northern stocks are slightly on the rise. This rise is probably due to global mesh size increase, even if slight and a decrease on fishing effort where immature species are caught. Norway Lobster stocks unloading is stable or slightly lower and yields, as far as northern fishery are concerned, vary and oscillate between ±15 to ±20 % at about an average of 100 kg/day. Biological parameters used in the evaluations for each species are those used in CIEM and CEE work cells. Among those parameters, those describing growth are the greatest. For Hakes, an intermediary growth equation between males and females has been used. For Norway Lobsters, both sexes are treated separately. Simulations were carried out according to 3 types of data: Norway Lobster vessels fishing effort variations. Norway Lobster vessels mesh increase. Norway Lobster vessels fishing effort decrease or mesh increasing go along in the same direction for Hake and Norway Lobster stock production (chart A and B). Lastly, a brief study on results evaluation significance was done to modify: - the size of Hake rejects by Norway Lobster vessels. The range of sizes stays the same but the amount in each class varies according to the same percentage. - Norway Lobsters growth parameters, both values used (L» = 76 mm and k = 0.11 for males, L°° = 56 mm and k = 0.14 for females) representing the "high" hypothesis. In the first case, a 20% error rate for rejects evaluation with 60 mm mesh would only bring a 3% modification rate on global stock production. Those first results are contradicting usual evaluation conclusions and it will be necessary to recalculate by modifying the size class step. In the second case, to decrease L» and increase growth speed, in time production variations remain within usual inter annual fluctuations. In all figure cases, calculations confirming greater yield for in time production through hypothetical mesh size increase to 60 mm, are definitely well founded.
1 - Rappel des buts de l'étude La gestion des pêcheries de merlu et de langoustine peut être considérée comme le problème le plus important du Golfe de Gascogne. Les méthodes de calcul employées pour évaluer les variations de la production sous diverses contraintes d'effort et de maillage mettent toutes l'accent sur le rôle capital des pêcheries à petits maillages sur l'état du stock nord de merlu. Le niveau de responsabilité des pêcheries de langoustine du Golfe de Gascogne dans la surexploitation du merlu semble démesuré eu égard aux dimensions respectives des deux stocks. Le stock de merlu s'étend du Nord des Iles Britanniques au Nord de l'Espagne alors que le stock de langoustine est localisé aux vasièrés du Golfe de Gascogne. La solution biologique du problème est connue et tient à une augmentation généralisée des maillages à 80 mm qui amènerait le rendement du stock de merlu à son maximum. Il serait illusoire de prétendre que tous les acteurs opérant sur le stock de merlu arriveront jamais à l'utiliser. Pour le moment, le problème se pose essentiellement en termes économiques car beaucoup de navires poursuivent un schéma d'exploitation hérité des années 1960 et pèchent sur des vasièrés côtières qui sont les zones les plus exploitées et où ils effectuent leurs captures au détriment des jeunes classes d'âge de merlu et de langoustine. En raison des délais impartis, cette étude constitue la préparation à une modélisation bioéconomique. On y trouvera donc une description des pêcheries et un bilan de l'exploitation sur les données disponibles en 1986. 2 - Travaux effectués 2 . 1 Description de la pêcherie Il s'agissait avant tout de poser les problèmes et de préparer les analyses ultérieures. Les langoustiniers sont présumés, d'après les modèles d'évaluation employés, effectuer sur les immatures de merlu des prélèvements tels qu'ils mettent en danger toute l'exploitation du stock. La distribution de la langoustine est très liée à la nature du fond car elle ne peut construire son terrier que sur des fonds de vase fine. Celle du merlu est beaucoup plus large et inféodée à la recherche de nourriture, crevettes euphausiacées en particulier, on le trouve donc sur les fonds sableux à sablo-vaseux. La langoustine est recherchée par une flottille de 400 à 450 bateaux dont les caractéristiques sont très variables suivant leur appartenance géographique. Au nord, la pêcherie est proche des ports exploitants et les rendements en langoustine et en prise accessoire sont suffisants pour faire vivre une flottille ancienne. Vers le sud, la structure est très diversifiée et la flexibilité est généralement la règle et les navires de construction récente peuvent changer de cible aisément de façon saisonnière ou au cours de la même journée de pêche. Globalement, les débarquements de merlu du stock nord sont en légère hausse. Ce redressement est dû probablement aux augmentations de maillage, même légères, généralisées et à une baisse de l'effort sur les pêcheries où s'effectuent des captures d'immatures. Les débarquements de langoustine sont stables ou en légère baisse et les rendements, au moins sur la pêcherie du nord, varient avec des oscillations de ±15 à ±20 % autour d'une moyenne de 100 kg/jour. Les paramètres biologiques utilisés pour chaque espèce dans les évaluations sont ceux en usage dans les groupes de travail du CIEM et de la CEE. Parmi ces paramètres, ceux décrivant la croissance sont les plus importants. Pour le merlu une équation de croissance intermédiaire entre mâles et femelles a été utilisée. Pour la langoustine les deux sexes sont traitées séparément. Les simulations ont porté sur trois types de données : Variations de l'effort des langoustiniers Augmentation du maillage des langoustiniers La diminution de l'effort des langoustiniers ou L'augmentation de maillage agisse très exactement dans le même sens sur la production des stocks de merlu et de langoustine. Enfin une étude succincte de la sensibilité des résultats des évaluations a été effectuée pour des modifications : - de la composition en taille des rejets de merlu par les langoustiniers. L'étendue des tailles reste la même mais le nombre dans chaque classe varie selon le même pourcentage. des paramètres de croissance de la langoustine, le couple de valeurs utilisées (L» = 76 mm et k = 0.11 pour les mâles, L°° = 56 mm et k = 0.14 pour les femelles) constituant l'hypothèse "haute" Dans le premier cas, une erreur de 20 % sur l'évaluation des rejets pour un cnaillage de 60 mm n'apporterait qu'une modification de 3 % dans la production globale du stock. Ces premiers résultats sont en contradiction avec les conclusions habituelles des évaluations et il sera nécessaire de reprendre les calculs en modifiant le pas des classes de taille. Dans le deuxième cas, pour une diminution de L» et une augmentation de la vitesse de croissance, les variations de la production à terme restent à l'intérieur des fluctuations interannuelles habituelles. Dans tous les cas de figure, les calculs confirmant l'augmentation de la production à terme dans l'hypothèse d'une augmentation de maillage à 60 mm sont d'une robustesse à toute épreuve. Droits : 1987 Ifremer http://archimer.ifremer.fr/doc/1987/rapport-1763.pdf http://archimer.ifremer.fr/doc/00000/1763/ | Partager |
Etude d'une gestion optimale des pecheries de langoustine et de poissons demerseaux en mer Celtique. Tome 3 Auteur(s) : Charuau, Anatole Biseau, Alain Charuau, Anatole Biseau, Alain Résumé : All the biological elements obtained in the two first phases of the study and the basical economical data are synthetized in a bio-economical model. From a typology of French fleets fishing in Celtic Sea, the carried out "métiers" (target-species + areas) are pointed out, which allows to define spatio-temporal "boxes". In each compartment, at a given time, the interactive components between fleets and stocks are known. The principle of the model consists to distribute, for each time interval, the fleets in each box. The allocation of fishing effort is assigned by two coefficients : "adherence" and "preference", expressing the abilities of fleets to seize the opportunities. Thus, it is possible to assess the consequences of usual management measures : quotas, mesh size, limitation of fishing effort, etc ... Une synthèse de tous les éléments biologiques acquis précédemment et des données économiques de base est effectuée dans un modèle bio-économique. A partir d'une typologie des flottilles françaises péchant en Mer Celtique, on met en évidence les métiers (espèces + secteurs) pratiqués, ce qui permet de définir des compartiments spatio-temporels dans lesquels on connaît à un moment donné les éléments interactifs entre flottilles et stocks. Le principe du modèle consiste à distribuer, à chaque intervalle de temps les flottilles dans ces compartiments. L'allocation de l'effort est gérée par deux coefficients, adhérence et préférence, qui traduisent les capacités des flottilles à saisir les opportunités. Ainsi, il est possible d'évaluer les conséquences des mesures habituelles de gestion : quotas, maillages, limitation de l'effort, etc... Droits : 1989 Ifremer http://archimer.ifremer.fr/doc/1989/rapport-1564.pdf http://archimer.ifremer.fr/doc/00000/1564/ | Partager Voir aussi Bio economical model Typology of fleets Celtic sea Modèle bio économique Typologie des flottilles Mer Celtique Télécharger |
Données économiques maritimes françaises 1997 Auteur(s) : Kalaydjian, Regis Résumé : The purpose of this book is to value the economic significance of marine-related activities in France. Each industrial, or public non-commercial, sector is characterized by key figures relating to annual turnover, value added, employment and budget. These figures are accompanied with qualitative information on the recent development, current situation and future perspectives of the sector in terms of markets, employment and technological progress. Public and private R&D is also allowed for. Given the diversity of marine-related activities, this information aims at enabling the reader to assess their importance from a comparative angle.
From the sector-based approach it is possible to draw certain conclusions. Notably, commercial activities contributed over 1,3% of the GDP in 1995, such ratio having to be seen as a minimum estimate, worked out on the basis of available data. Seaside-related tourism is by far the most important industry. Most activities experienced a decrease in employment in the first half of the '90s. The estimated annual amount spent on R&D was over FFr 4,5 billion in the recent past period 1995-1996.
Le présent ouvrage a pour but d'évaluer l'importance économique des activités liées à la mer en France. Chaque secteur - industriel marchand, public non marchand - est caractérisé par des chiffres clés portant sur le chiffre d'affaires annuel, la valeur ajoutée, l'emploi, le budget. Ces indicateurs sont accompagnés d'informations qualitatives sur l'évolution récente, la situation actuelle et les perspectives du secteur : marchés, emplois, progrès technique. La R&D publique et privée est également prise en compte. Compte tenu de la diversité des activités liées à la mer, ces informations visent à permettre au lecteur d'en apprécier l'importance sous un angle comparatif. L'approche sectorielle permet de tirer certaines conclusions. Notamment, les activités marchandes ont contribué à plus de 1,3 % du PIB en 1995, un tel ratio devant être compris comme un minimum, calculé à partir des données disponibles. Le tourisme littoral est, de loin, l'activité la plus importante. Dans la plupart des branches, l'emploi baisse dans la première moitié des années 1990. Les dépenses annuelles de R&D sont estimées à plus de 4,5 milliards de francs dans la période récente 1995-1996. Droits : 1997 Ifremer http://archimer.ifremer.fr/doc/2001/rapport-1347.pdf http://archimer.ifremer.fr/doc/00000/1347/ | Partager |