Éditeur(s) : Elsevier Science Bv
Résumé : There has been growing interest in the development of mud crab aquaculture in New Caledonia. However, for this to become established at a commercial level, a cost-effective formulated feed based on internationally-available ingredients needs to be developed. We have evaluated the optimal dietary protein content for juvenile crabs, Scylla serrata (Forskål, 1775), using a series of diets with a protein content ranging from 27 to 49% and soy protein concentrate (SPC) as the main protein source. For this purpose, 54 individually housed crabs were allocated to five dietary treatments (n = 10 or 11). The crabs were fed ad libitum, for 81 days with the allocated diets. The apparent digestibilities of dry mater, crude protein and energy were high (96.2-97.3%), irrespective of the diet. The voluntary feed intake (VFI) of crabs widely varied from 46 to 220 g kg- 1of fresh initial body weight per week (iBW week- 1) whatever the diet. However, SPC intake and protein intake increased significantly with dietary protein content up to the diet with 40% crude protein, but did not increase further with diets containing 44% and 49% crude protein. The cumulative molts were strongly affected by the VFI levels or energy intake and also, to a lesser extent, by the levels of SPC or protein in diets. Two phases in tissue gain were observed after ecdysis: an initial deposition phase lasting around 30 days followed by a plateau which lasted until the next molt. The daily tissue growth was 16.5% of dry body weight (dry BW) one day after ecdysis and dramatically decreased to 3.6% of dry BW over the first 10 days, then decreased more slowly to the minimum value of 1.3% of dry BW over the next 70 days. During the course of experiment, the best growth (tissue growth and molt frequency) and the best feed efficiency (FCR, PER, retention of proteins and lipids) were obtained with crabs fed on the diet with 40% crude protein. This result was confirmed by a bioenergetic study which showed significantly higher allocation of the energy intake for growth (RE) of crabs fed on diet 40% crude protein. Finally, under our experimental conditions, 1 kg of juvenile crabs required 6.5 ± 1.1 g of protein per day. This level was obtained with the diet SPC-42 that contained 40% of protein of which almost three quarters were derived from SPC. Two hypotheses are proposed to explain the negative effect of high level of SPC or protein on growth and feed efficiency for crabs fed on in diets containing 52% and 60% SPC.
Aquaculture (0044-8486) (Elsevier Science Bv), 2014-10 , Vol. 434 , P. 499-509

Droits : 2014 Elsevier B.V. All rights reserved.
http://archimer.ifremer.fr/doc/00211/32196/30630.pdf
http://archimer.ifremer.fr/doc/00211/32196/

Éditeur(s) : HAL CCSD Elsevier Science
Résumé : International audience
Some anthropogenic noise is now considered pollution, with evidence building that noise from human activities such as transportation, construction and exploration can impact behaviour and physiology in a broad range of taxa. However, relatively little research has considered the effects of repeated or chronic noise; extended exposures may result in habituation or sensitisation, and thus changes in response. We conducted a field-based experiment at Moorea Island to investigate how repeated exposure to playback of motorboat noise affected a coral reef fish (Dascyllus trimaculatus). We found that juvenile D. trimaculatus increased hiding behaviour during motorboat noise after two days of repeated exposure, but no longer did so after one and two weeks of exposure. We also found that naïve individuals responded to playback of motorboat noise with elevated ventilation rates, but that this response was diminished after one and two weeks of repeated exposure. We found no strong evidence that baseline blood cortisol levels, growth or body condition were affected by three weeks of repeated motorboat-noise playback. Our study reveals the importance of considering how tolerance levels may change over time, rather than simply extrapolating from results of short-term studies, if we are to make decisions about regulation and mitigation.
ISSN: 0013-9327

Droits : http://creativecommons.org/licenses/by/
hal-01357915
https://hal-univ-perp.archives-ouvertes.fr/hal-01357915
https://hal-univ-perp.archives-ouvertes.fr/hal-01357915/document
https://hal-univ-perp.archives-ouvertes.fr/hal-01357915/file/1-s2.0-S0269749116304468-main.pdf
DOI : 10.1016/j.envpol.2016.05.058

Éditeur(s) : HAL CCSD PeerJ
Résumé : International audience
The study of vertebrate ontogenies has the potential to inform us of shared developmental patterns and processes among organisms. However, fossilised ontogenies of early vertebrates are extremely rare during the Palaeozoic Era. A growth series of the Late Devonian ''acanthodian'' Triazeugacanthus affinis, from the Miguasha Fossil-Fish Lagerstätte, is identified as one of the best known early vertebrate fossilised ontogenies given the exceptional preservation, the large size range, and the abundance of specimens. Morphological, morphometric, histological and chemical data are gathered on a growth series of Triazeugacanthus ranging from 4 to 52 mm in total length. The developmental trajectory of this Devonian ''acanthodian'' is characteristic of fishes showing a direct development with alternating steps and thresholds. Larvae show no squamation but a progressive appearance of cartilaginous neurocranial and vertebral elements, and appendicular elements, whereas juveniles progress in terms of ossification and squamation. The presence of cartilaginous and bony tissues, discriminated on histological and chemical signatures, shows a progressive mineralisation of neurocranial and vertebral elements. Comparison among different body proportions for larvae, juveniles and adults suggest allometric growth in juveniles. Because of the phylogenetic position of ''acanthodians'', Triazeugacanthus ontogeny informs us about deep time developmental conditions in gnathostomes.
ISSN: 2167-8359

Droits : http://creativecommons.org/licenses/by/
hal-01633978
http://hal.upmc.fr/hal-01633978
http://hal.upmc.fr/hal-01633978/document
http://hal.upmc.fr/hal-01633978/file/peerj-3969.pdf
DOI : 10.7717/peerj.3969

Éditeur(s) : HAL CCSD BioMed Central
Résumé : International audience
BACKGROUND: The aim of this study was to evaluate the role of family history of cancer and personal history of other medical conditions in the aetiology of the oral cavity cancer in France. METHODS: We used data from 689 cases of oral cavity squamous cell carcinoma and 3481 controls included in a population-based case--control study, the ICARE study. Odds-ratios (ORs) associated with family history of cancer and personal medical conditions and their 95% confidence intervals (95% CI) were estimated by unconditional logistic regression and were adjusted for age, gender, area of residence, education, body mass index, tobacco smoking and alcohol drinking. RESULTS: Personal history of oral candidiasis was related to a significantly increased risk of oral cavity cancer (OR 5.0, 95% CI 2.1-12.1). History of head and neck cancers among the first-degree relatives was associated with an OR of 1.9 (95% CI 1.2-2.8). The risk increased with the number of first-degree relatives with head and neck cancer. CONCLUSION: A family history of head and neck cancer is a marker of an increased risk of oral cavity cancer and should be taken into account to target prevention efforts and screening. Further studies are needed to clarify the association between oral cavity cancer and personal history of candidiasis.
ISSN: 1471-2407

inserm-00913514
http://www.hal.inserm.fr/inserm-00913514
http://www.hal.inserm.fr/inserm-00913514/document
http://www.hal.inserm.fr/inserm-00913514/file/1471-2407-13-560.pdf
DOI : 10.1186/1471-2407-13-560

Éditeur(s) : HAL CCSD
Résumé : International audience
The French West Indies (F.W.I.) were French colonies with a specific legal frame until 1946 when they became French departments. Since that time the legal frame in force concerning archaeological heritage protection is exactly the same than in metropolitan France. In this system all the laws relating to cultural heritage are grouped in the "Code du Patrimoine" (Heritage code), which contains several topics such as archives, museums, archaeology and historic monuments. Some articles refer to the Penal Code, the Code of Urban Development, the Environmental Code or the Mining Code. These laws are supplemented by various decrees that define the applying conditions for different areas: rescue archeology (decree 2004-490), INRAP , advisory bodies, the content of the field reports, penal provisions, etc ... The heritage laws have been created in 1917 (Historic Monuments) and 1941 (archaeology). The law on rescue archeology is in force only since 2001 and is an application of the European Convention of Malta (1992). However, the implementation of the regulation and of the institutions in charge of is application in the French West Indies is fairly recent. In this presentation after a general presentation of the archaeological heritage protection French system we will focus on the different aspects of is application in F.W.I.: difficulties linked to the application of a system suited for metropolitan France, the level of the French West Indian people implication in the archaeological heritage protection and the future perspectives.
The Archaeology of the Netherlands Antilles and Aruba, 16th Annual Meeting of the European Association of Archaeologists
Den Haag, France

Droits : info:eu-repo/semantics/OpenAccess
hal-00960161
https://hal.univ-antilles.fr/hal-00960161
https://hal.univ-antilles.fr/hal-00960161/document
https://hal.univ-antilles.fr/hal-00960161/file/European_rules_american_.pdf

Éditeur(s) : HAL CCSD Nature Publishing Group
Résumé : International audience
Coral reefs are among the most species-rich and threatened ecosystems on Earth, yet the extent to which human stressors determine species occurrences, compared with biogeography or environmental conditions, remains largely unknown. With ever-increasing human-mediated disturbances on these ecosystems, an important question is not only how many species can inhabit local communities, but also which biological traits determine species that can persist (or not) above particular disturbance thresholds. Here we show that human pressure and seasonal climate variability are disproportionately and negatively associated with the occurrence of large-bodied and geographically small-ranging fishes within local coral reef communities. These species are 67% less likely to occur where human impact and temperature seasonality exceed critical thresholds, such as in the marine biodiversity hotspot: the Coral Triangle. Our results identify the most sensitive species and critical thresholds of human and climatic stressors, providing opportunity for targeted conservation intervention to prevent local extinctions.
ISSN: 2041-1723

hal-01282870
https://hal-univ-perp.archives-ouvertes.fr/hal-01282870
https://hal-univ-perp.archives-ouvertes.fr/hal-01282870/document
https://hal-univ-perp.archives-ouvertes.fr/hal-01282870/file/ncomms10491.pdf
DOI : 10.1038/ncomms10491

Éditeur(s) : HAL CCSD
Résumé : International audience
Mylonite-bearing crustal shear zones are exhumed extensions at depth of (potentially seismogenic) brittle faultsat shallow structural level. By concentrating deformation, shear zones play a major role in the rheology and mechanicalbehavior of the continental crust. Analysis of shear zone geometry and microstructures is a useful toolto decipher deformation kinematics, though finite strain estimation is still relatively qualitative. Timing of thedeformation has also been the focus of numerous studies using the complete spectrum of geochronometers. However,only rare examples provide geochronological data that can be unambiguously linked with deformation. Thus,time-scales over which major mylonite zones develop and remain active under ductile conditions as well as theirstrain rates often remain poorly documented. Several sections across the South Armorican Shear Zone (SASZ),a crustal-scale, several km-thick dextral shear zone were investigated by structural, petrological and Ar/Ar radiochronologicalmethods. Finite strain profiles on these sections showed a strong deformation partitioning towardsthe ultramylonite core of the SASZ, with a decrease, of both the C’/S mean angle (from ca. 45 to less than5) and the Quartz grain-size (from ca. 150 to 5 m). In parallel, conventional and in-situ Ar/Ar datings on thefabric-forming white micas were performed on compositionally complex white-micas. Inherited magmatic muscovitescarried by the foliation and newly-formed, syn-tectonic substituted phengites located along the shear bandsyielded 2 age groups for the less deformed samples. Along the shear zone cross-section, the difference betweenthese two ages evolves from 10-15 Ma in weakly deformed domains to zero toward the SASZ core. In addition, thevery fine-grained syn-tectonic phengites yielded the same ca. 300-298 Ma age irrespectively of their distance to thecore of the shear zone, even in slightly deformed rocks distant by several km. These results support a new modelof crustal-scale shear zone activity, where the whole body of the shear zone is active throughout its history, i.e.the actively deforming zone does not get progressively narrower. The strain distribution nevertheless evolves withtime, with an increasingly larger fraction partitioned in the ultramylonitic core. Besides, combination of the finitestrain estimations and the Ar/Ar ages enables us to assess the range of strain rates associated with mylonitization.
EGU General Assembly 2014
Vienne, Austria

insu-01565057
https://hal-insu.archives-ouvertes.fr/insu-01565057

Éditeur(s) : HAL CCSD Oxford University Press (OUP)
Résumé : International audience
We report new structural, microstructural, petrological, and major- and trace-element data on ultramafic rocks from the Kondyor zoned ultramafic complex in Far-East Russia. The ultramafic rocks are subdivided into three subconcentric lithologies, from core to rim: (1) a metasomatic domain where generally phlogopite-rich dykes pervasively intrude dunite; (2) a main dunite core; (3) a pyroxenite rim. The ultramafic rocks have nearly vertical contacts with the surrounding Archaean basement (gneisses, quartzites and marbles) and hornfelsed Riphean sediments. The hornfelsed sediments show a relatively steep ( 60), outward dipping layering, which rapidly flattens to horizontal away from the inner contact. Although the Riphean sediments define a dome-like structure, the inward, shallow dipping foliation of the dunites indicates a synformal structure. Detailed petro-structural investigations indicate that the Kondyor dunites were deformed by solid-state flow under asthenospheric mantle conditions. The outward textural change from coarse- to fine-grained equigranular dunite and the outward-increasing abundance of subgrains and recrystallized olivine grains suggest dynamic recrystallization while fluid circulation was channelized within the core metasomatic zone, with a decreasing melt fraction from core to rim, and also suggest that solid-state deformation induced grain-size reduction towards the cooling border of the Kondyor massif. Based on their geochemistry, the dunites are interpreted as mantle rocks strongly affected by reaction with melts similar to the JurassicCretaceous Aldan Shield lamproites. Rim pyroxenites were formed by a melt-consuming peritectic reaction, implying the existence of at least a small, conductive thermal gradient around the dunite body while the latter was still at near-solidus temperature conditions. This suggests that the zoned structure of Kondyor was initiated at mantle depths, most probably within the subcontinental lithosphere. Upon cooling, the lamproitic melts were progressively focused in the central part of the massif and drained into vein conduits where they reacted with the wall-rock dunite. Two-dimensional numerical modelling based on finite-differences with a marker-in-cell technique incorporates temperature-dependent rheologies for both molten and non-molten host rocks. The modelling consolidates the structural, petrological and geochemical interpretations, which show that the dunites represent the synformal, flat-lying apex of an asthenospheric mantle diapir, triggered by fluid pressure channelized in the core, which nearly reached the Earths surface. We conclude that translithospheric mantle diapirism is an important mode of mass transfer in the Earth.
ISSN: 0022-3530

hal-00424508
https://hal.archives-ouvertes.fr/hal-00424508
DOI : 10.1093/petrology/egn083

Éditeur(s) : HAL CCSD
Résumé : In 1996 the European Commission Humanitarian Office (ECHO) launched a regional approach for disaster preparedness, focusing in its first phase on Central America, Caribbean and Southeast Asia (including Bangladesh). The first step in this process was the preparation of a «diagnostic study» that involved a situation review of the countries in these regions with regard to their vulnerabilities, disaster preparedness capacities and national plans or policies for disaster management.The Centre for Research on the Epidemiology of Disasters of the Université Catholique de Louvain (UCL) served as ECHO’s principal technical support with the collaboration of other institutions in Europe and the regions.The present «diagnostic report», covering Central America and the Caribbean, has been carried out by the Centre International pour la Formation et les Echanges en Géosciences (CIFEG) under the supervision of Professor Robert D’Ercole (Université de Savoie, Chambéry).Mr. Thierry Lesales (Université des Antilles et de la Guyane) participated closely in the drafting of this report and was actively involved in the field missions with Mr D’Ercole where they met and interviewed numerous national officials, non-governmental organisations and regional and international bodies. Further assistance was provided by Claudine Misson (CRED) for the interviews and information collected in the Dominican Republic. The report also draws from an earlier mission undertaken by Dr. Philippe Masure (BRGM, France), Christian Bugnion (CRED) and Alexandra Angulo (CRED) who undertook some of the preparatory work for the diagnostic study.This report presents an analysis of the disaster preparedness situation in Central America and the Caribbean and provides some preliminary recommendations regarding priorities and future programme direction. As such it remains primarily a descriptive study. It is expected to form the basis for the formulation of the ECHO Disaster Preparedness Action Plan.
En 1996, la Oficina Humanitaria de la Comunidad Europea (ECHO) lanzó la iniciativa de un enfoque regional en materia de preparación a los desastres, concentrándose inicialmente en las regiones de América Central, Caribe y Asia del Sureste (incluyendo a Bangladesh). La primera fase de este proceso fue la preparación de un « diagnóstico» que implicaba un examen de la situación de los países de cada una de estas regiones en relación a la vulnerabilidad, la capacidad de preparación a los desastres y las políticas y planes nacionales en materia de gestión de desastres.El Centre for Research on the Epidemiology of Disasters (CRED), de la Université Catholique de Louvain (UCL), ha sido el principal apoyo técnico de ECHO para esta iniciativa, con la colaboración y asistencia de otras instituciones en Europa y en las regiones arriba mencionadasEl presente informe que cubre América Central y el Caribe, fue realizado por el International Centre for Training and Exchanges in Geosciences (CIFEG), bajo la dirección del Profesor Robert D'Ercole (Université de Savoie).Thierry Lesales (Université des Antilles et de la Guyane) participó de cerca a la realización de este documento y estuvo activamente implicado junto al Profesor D'Ercole en las misiones que se realizaron en varios países. En el curso de estas misiones, se entrevistaron con numerosos representantes de gobiernos nacionales, de ONGs y de organizaciones regionales e internacionales Se contó igualmente con la asistencia de Claudine Misson (CRED), quien realizó la misión en República Dominicana. El informe se basa igualmente en una misión anterior llevada a cabo por Philippe Masure (BRGM, France), Alexandra Angulo (CRED) y Christian Bugnion (CRED), la cual realizó parte del trabajo preparatorio para el diagnóstico.El informe presenta un análisis de la situación en América Central y el Caribe y provee recomendaciones preliminares para las prioridades y dirección del futuro programa. En el marco de la segunda fase, está destinado a servir de base para la formulación del Plan de Acción de Preparación a los Desastres de ECHO.
Depuis 1994, ECHO (Office Humanitaire de la Commission Européenne, devenu le service de la Commission européenne à l’aide humanitaire et à la protection civile) a financé, à l'échelle mondiale, de nombreuses opérations pour la prévention et la préparation aux catastrophes (catastrophes naturelles principalement) Ces financements ont répondu aux demandes d'ONG et d'organisations internationales qui ont-elles-mêmes mis en oeuvre les projets correspondants. Les évaluations de ces opérations ont donné des appréciations positives. Cependant, ECHO souhaite s'impliquer davantage dans la prévention et la préparation aux catastrophes et mieux cibler ses actions pour une plus grande cohérence d'ensemble.Au cours de la réunion du 16 juillet 1996, le Comité d'Aide Humanitaire a approuvé la nouvelle approche régionale proposée par ECHO pour son programme de prévention, d'atténuation et de préparation aux catastrophes, le DIPECHO (Dlsaster Preparedness ECHO), pour la période 1996—1998. Ce programme doit s'appliquer dans un cadre régional en concentrant d'abord ses financements sur des plans d'action dans les Caraïbes, en Amérique Centrale, en Asie du Sud-Est et au Bangladesh. Par ailleurs, au lieu de répondre exclusivement aux demandes de financements spécifiques d'ONG, d'organisations internationales et de gouvernements, ECHO souhaite préparer des plans d'action et déterminer les partenaires les plus appropriés pour une mise en oeuvre dirigée par ECHO même. En outre, le DIPECHO a pour objet de rendre plus efficace l'action de l'ensemble de l'Union Européenne, par une étroite coordination de son action avec celles de la Commission et des Etats Membres. Il est enfin prévu de faire précéder la préparation des plans d'action par une phase de diagnostic au cours de laquelle seront identifiés, pour chaque région, les risques, les structures et politiques de prévention existantes aux niveaux communautaire, national et régional, ainsi que les appuis extérieurs en cours et à venir. L'objectif est non seulement de déterminer les lacunes, mais également d'évaluer la cohérence et l'efficacité des systèmes de réponse dans leur ensemble......Dans ce contexte, une première mission exploratoire a été réalisée du 30 septembre au 12 octobre 1996 dans les Caraïbes et l'Amérique Centrale (quatre pays visités) et a débouché sur un premier rapport (A. Angulo, Ch. Bugnion, Ph. Masure, "Rapport de mission exploratoire dans les Caraïbes ct en Amérique Centrale pour DIPECHO").Ce rapport apporte de nombreuses informations et en particulier:(1) il définit le cadre conceptuel, insistant, à juste titre, sur le fait que la prévention et la préparation doivent être distinguées de l'aide d'urgence et qu'elles font partie d'un processus continu au même titre que le développement ;(2) il présente les principales organisations régionales et internationales, et leurs activités dans le domaine de la prévention et de la préparation;(3) il met en évidence les grands types de besoins et fournit les premières orientations pour le programme DIPECHO......Le présent rapport, constituant le diagnostic proprement dit, fait suite à une deuxième série de missions effectuées dans la même région. Il vise à compléter les apports de la mission exploratoire, notamment par:(a) une analyse des catastrophes et de leurs conséquences:(b) une évaluation comparée des risques dans la région;(c) une analyse détaillée des réalisations et des besoins en matière de réduction des risques et des conséquences des catastrophes naturelles ;(d) un examen des conditions actuelles pour un programme DIPECHO cohérent, réalisable et efficace, avec, en particulier, la prise en compte de l’organisation actuelle de la prévention et de la préparation dans la région et un état des appuis extérieurs ;- des propositions de lignes d'actions prioritaires pour le DIPECHO......Le diagnostic s'est appuyé sur une importante documentation : travaux scientifiques, études et rapports recueillis auprès du CRED-Université Catholique de Louvain, du CIFEG, du DHA, de l’IDNDR, de divers organismes sur le terrain (notamment le centre de documentation de San José au Costa Rica), et d'universités européennes (Université de Savoie. Chambéry, Université de Lausanne). Mais ce sont avant tout les nombreux entretiens menés lors des missions (près de 200) qui ont donné corps au diagnostic.Treize pays Ont été visités entre le 22/01 et le 07/03/1997 :- République Dominicaine (C Misson);- Costa Rica, Guatemala, Nicaragua et Cuba (R. D'Ercole) ;- Antigua, Barbade, Haïti, Jamaïque, Ste-Lucie, St-Maarten, St-Vincent et le Guyana (Th. Lesales).Leur choix a été déterminé en concertation avec ECHO, le CRED-UCL et le CIFEG. Ils ne recouvrent pas l'ensemble des pays qu'il aurait été théoriquement possible de visiter. Cependant, le choix de pays-clés, les contacts établis avec de nombreux organismes de portée régionale et la documentation consultée, ont permis de bâtir un diagnostic d'ensemble......L'étude comporte trois parties.La 1e partie constitue une analyse des catastrophes en termes de bilan et de risque. Il s'agit, à l'aide de cartes, notamment, de montrer les effets des catastrophes naturelles en Amérique Centrale et dans les Caraïbes, de présenter la répartition et la fréquence des aléas naturels et de procéder à une analyse de critères de vulnérabilité. L'objectif est, enfin, de déterminer des niveaux de risque, à l'échelle de la région, compte tenu des dangers naturels et des critères de vulnérabilité.La 2° partie est l'étude des actions entreprises dans la région, ces dernières années, afin de réduire les risques et les conséquences des catastrophes. Cette étude permet de dégager des lacunes et des besoins. Les différentes composantes entrant dans le processus de réduction des catastrophes sont retenues : recherche scientifique et technique, prévention stricto sensu, préparation, information / formation. L'accent est également placé sur les modes actuels d'application des politiques de réduction des risques : de l'approche sectorielle à l'approche intégrée.La 3e partie traite des conditions actuelles pour la mise en oeuvre d'un programme DIPECHO cohérent et efficace. Quatre aspects fondamentaux sont analysés: les particularités régionales et nationales (l'hétérogénéité et ses conséquences); les faiblesses et qualités institutionnelles aux différents échelons géographiques: les caractéristiques des organismes susceptibles de contribuer à la mise en oeuvre du DIPECHO; le rôle actuel et en perspective de la Communauté Européenne et des Etats Membres.Chaque partie comporte une conclusion partielle La conclusion générale reprend les idées force des conclusions intermédiaires ct débouche sur des lignes d'actions prioritaires recommandées pour le DIPECHO......L'étude confiée au CIFEG par le CRED-UCL et ECHO a été coordonnée par Robert D'Ercole (Département de Géographie, Université de Savoie, Chambéry, France). Elle a bénéficié de la collaboration de Thierry Lesales (Département de Géographie, Université des Antilles et de la Guyane, Martinique, France) et de Patrick Pigeon (Département de Géographie, Université de Savoie, Chambéry, France). Ont également contribué à la réalisation de celle étude: Claudine Misson (CRED-UCL, Belgique), Jean-Claude Napias (CIFEG, directeur), Jacques Giri (CIFEG, président), Sylvie Orlyk (CIFEG, secrétariat).
https://hal.archives-ouvertes.fr/hal-01196496

hal-01196496
https://hal.archives-ouvertes.fr/hal-01196496
https://hal.archives-ouvertes.fr/hal-01196496/document
https://hal.archives-ouvertes.fr/hal-01196496/file/D%27Ercole%20et%20al%201997%20Diagnostic%20DIPECHO%20Caraibes%20compressed.pdf

Éditeur(s) : Gauthier-Villars
Résumé : Echinoderms show phenotypic plasticity in which variation in environmental conditions elicit graded reaction norms of morphological change. With the sea urchin Strongylocentrotus purpuratus under laboratory conditions, decreases in available food caused decreases in dry weights of the gonad and gut coupled with increases in the mass of Aristotle's lantern and length of the demi-pyramids. Spine clipping caused increased spine growth as well as decreases in the gut and gonad masses. Survival rate remained unchanged over a range of feeding and clipping treatments. In the field, at Sunset Bay, Oregon, well-fed sea urchins, with relatively small demi-pyramids, showed survival rates similar to poorly fed sea urchins that had large demi-pyramids. The wide range of morphological change, coupled with the narrow range of-change in survival, suggests that morphological plasticity buffers survival and hence would increase fitness. Phenotypic plasticity shown by other sea urchins includes changes in the relative sizes of Aristotle's lantern in Diadema antillarum and Echinometra mathaei and seasonal variation in the density of pedicellariae in Echinus esculentus. Variation in body size of echinoids and asteroids in different habitats and variation in number of arms in crinoids also may be examples of adaptive plasticity. Seasonal atrophy of internal organs in the sea cucumber Parastichopus californicus has been interpreted as an adaptive response to food limitation but, given the nature of responses in other echinoderms, such an interpretation seems unlikely and the significance of seasonal atrophy of organs in holothurians remains unknown.
Oceanologica Acta (0399-1784) (Gauthier-Villars), 1996 , Vol. 19 , N. 3-4 , P. 347-355

Droits : info:eu-repo/semantics/openAccess
http://archimer.ifremer.fr/doc/00094/20492/18187.pdf
http://archimer.ifremer.fr/doc/00094/20492/

Éditeur(s) : HAL CCSD AGU and the Geochemical Society
Résumé : International audience
Analysis of the microstructures in the km-scale mantle shear zone that separates the northern and the central parts of the Lanzo peridotite massif provides evidence of an evolution in time and space of deformation processes accommodating shearing in the shallow mantle within an extensional setting. This shear zone displays an asymmetric distribution of deformation facies. From south to north, gradual reorientation of the foliation of coarse porphyroclastic plagioclase-bearing peridotites is followed by development of protomylonites, mylonites, and mm-scale ultramylonite bands. A sharp grain size gradient marks the northern boundary. Early deformation under near-solidus conditions in the south is recorded by preservation of weakly deformed interstitial plagioclase and almost random clinopyroxene and plagioclase crystal orientations. Feedback between deformation and melt transport probably led to melt focusing and strain weakening in the shear zone. Overprint of melt-rock reaction microstructures by solid-state deformation and decrease in recrystallized grain size in the protomylonites and mylonites indicate continued deformation under decreasing temperature. Less enriched peridotite compositions and absence of ultramafic dykes or widespread melt-impregnation microstructures north of the shear zone and clinopyroxene and amphibole enrichment in the mylonites and ultramylonites suggest that the shear zone acted as both a thermal barrier and a high-permeability channel for late crystallizing fluids. These observations, together with chemical data indicating faster cooling of central Lanzo relative to the northern body, corroborate that this shear zone is a mantle detachment fault. All deformation facies have crystal preferred orientations consistent with deformation by dislocation creep with dominant activation of the (010)[100] and (100)[001] systems in olivine and orthopyroxene, respectively. Dynamic recrystallization produces dispersion of olivine CPO but not a change of dominant deformation mechanism. Evidence for activation of grain boundary sliding is limited to mm-scale ultramylonite bands, where solid-state reactions produced very fine grained polymineralic aggregates. Except for these latest stages of deformation, strain localization does not result from the microstructural evolution; the grain size decrease is a consequence of the need to deform a rock volume whose strength continuously increases because of decreasing temperature conditions. Strain localization in the intermediate levels thus essentially results from the more localizing behavior of both the deep, partially molten, and shallow parts of this extensional shear zone distribution.
ISSN: 1525-2027

hal-00644844
https://hal.archives-ouvertes.fr/hal-00644844
DOI : 10.1029/2011GC003627

Résumé : Sea fish farms with production of more than 20 tons per year in France must obtain two operating licences: (i) one for Sea Farming (AECM), with the aim of ensuring that the granted site and use of the maritime public domain for exploitation will respect all restrictions of general interest; (ii) one for regulating Facilities Classified for the Protection of the Environment (ICPE). Although the first one requires a relatively simple licence request file, the second one demands a very complete file, which includes, beyond the notice of exploitation information, a complete impact study, as well as a hazards study and a health and safety notice. In this context, petitioners in Corsica (adjustment of status or new exploitation) are faced with the same difficulties, which highlighted the need for a methodological guide adapted to each region's specific situation, assembling in particular the necessary baseline data (legal, zootechnical, geographical, climatic, socio-economic, ecological...) as well as recognised methods for evaluating the potential effects of the farm on the environment. Development of this guide was supported by ADEC and supervised by a steering committee composed of representatives from the administrations concerned, fish farmers and scientific bodies. The significant aspects dealt with the effects of fish farming on Posidonie herbarium, a protected species very present in Corsica and with coordinating the two AECM and ICPE procedures. For each part of the ICPE file, the guide introduces the technical or scientific context and, depending upon the case, the state of the art, sources of available data, acquisition and methods of acquiring measurements and of assessing the potential effects, as well as practical editing recommendations. Finally, the guide is made complete by a model schedule of conditions designed to help petitioners to have a specialist research department incorporate all or part of the file. This guide primarily concerns first-time marine facilities for exploitation in Corsica, conceived of as in the open sea rather than in confined spaces. Nonetheless, any fish farmer or future fish farmer needing to process a request for an exploitation licence may find it useful.
Les piscicultures marines de plus de 20 t/an de production sont soumises en France à l'obtention de deux autorisations d'exploiter : (i) celle au titre des Cultures Marines (AECM), visant à s'assurer que le site concédé et l'usage du domaine public maritime pour l'exploitation permettent de respecter l'ensemble des contraintes d'intérêt général ; (ii) celle au titre de la réglementation des Installations Classées pour la Protection de l'Environnement (ICPE). Si la première nécessite un dossier de demande d'autorisation relativement simple, la seconde requiert un dossier très complet, qui comprend, outre une notice de renseignements sur l'exploitation, une étude d'impact complète, ainsi qu'une étude des dangers et une notice d'hygiène et de sécurité. Dans ce contexte, les demandeurs en Corse (régularisation ou exploitation nouvelle) sont confrontés aux mêmes difficultés, ce qui a mis en évidence le besoin d'un guide méthodologique adapté aux spécificités régionales, rassemblant en particulier les données de base nécessaires (juridiques, zootechniques, géographiques, climatiques, socio-économiques, écologiques...) ainsi que les méthodes reconnues de l'évaluation des effets potentiels de la ferme sur l'environnement. L'élaboration de ce guide a été soutenue par l'ADEC et suivie par un comité de pilotage composé de représentants des administrations concernées, des pisciculteurs et d'organismes scientifiques. Les aspects importants ont porté sur les effets de la pisciculture sur l'herbier de Posidonie, espèce protégée très présente en Corse et sur la coordination entre les deux procédures AECM et ICPE. Pour chaque partie du dossier ICPE, le guide présente le contexte technique ou scientifique et selon le cas, l'état de l'art, les sources de données disponibles, les méthodes d'acquisition des mesures et d'évaluation des effets potentiels, ainsi que des recommandations pratiques de rédaction. Enfin, le guide est complété par un cahier des charges type destiné à aider les demandeurs à confier à un bureau d'étude spécialisé la réalisation de tout ou partie de la constitution du dossier. Ce guide concerne prioritairement les installations marines de nouvelles exploitations en Corse, envisagées en mer ouverte plutôt que dans des espaces confinés. Néanmoins tout pisciculteur ou futur pisciculteur devant instruire une demande d'autorisation d'exploiter peut y trouver intérêt.

Droits : info:eu-repo/semantics/openAccess
http://archimer.ifremer.fr/doc/2004/rapport-2188.pdf
http://archimer.ifremer.fr/doc/00000/2188/

Éditeur(s) : Elsevier
Résumé : Bioaccumulation is difficult to document because responses differ among chemical compounds, with environmental conditions, and physiological processes characteristic of each species. We use a mechanistic model, based on the Dynamic Energy Budget (DEB) theory, to take into account this complexity and study factors impacting accumulation of organic pollutants in fish through ontogeny. The bioaccumulation model proposed is a comprehensive approach that relates evolution of hake PCB contamination to physiological information about the fish, such as diet, metabolism, reserve and reproduction status. The species studied is the European hake (Merluccius merluccius, L. 1758). The model is applied to study the total concentration and the lipid normalised concentration of 4 PCB congeners in male and female hakes from the Gulf of Lions (NW Mediterranean sea) and the Bay of Biscay (NE Atlantic ocean). Outputs of the model compare consistently to measurements over the life span of fish. Simulation results clearly demonstrate the relative effects of food contamination, growth and reproduction on the PCB bioaccumulation in hake. The same species living in different habitats and exposed to different PCB prey concentrations exhibit marked difference in the body accumulation of PCBs. At the adult stage, female hakes have a lower PCB concentration compared to males for a given length. We successfully simulated these sex-specific PCB concentrations by considering two mechanisms: a higher energy allocation to growth for females and a transfer of PCBs from the female to its eggs when allocating lipids from reserve to eggs. Finally, by its mechanistic description of physiological processes, the model is relevant for other species and sets the stage for a mechanistic understanding of toxicity and ecological effects of organic contaminants in marine organisms.
Journal of Sea Research (1385-1101) (Elsevier), 2009-10 , Vol. 62 , N. 2-3 , P. 124-134

Droits : 2009 Elsevier B.V. All rights reserved.
http://archimer.ifremer.fr/doc/2009/publication-6789.pdf
DOI:10.1016/j.seares.2009.02.006
http://archimer.ifremer.fr/doc/00000/6789/

Éditeur(s) : HAL CCSD
Résumé : International audience
Sub-continental lithospheric mantle rocks are exhumed at the foot of magma-poor distal passive margins as aresponse to extreme stretching of the continental crust during plate separation. Remnants of the Northern Iberianpaleo-passive margin are now exposed in the North-Pyrenean Zone (NPZ) and represent field analogues to studythe processes of continental crust thinning and subcontinental mantle exhumation. The NPZ results from theinversion of basins opened between the Iberia and Europa plates during Albo-Cenomanian times. In the westernNPZ, the ‘Chaînons Béarnais’ ranges display a fold-and-thrust structure involving the Mesozoic sedimentarycover, decoupled from its continental basement and associated with peridotite bodies in tectonic contact withPalaeozoic basement lenses of small size. Continental extension developed under hot thermal conditions, asdemonstrated by the syn-metamorphic Cretaceous ductile deformation affecting both the crustal basement and theallochthonous Mesozoic cover.In this study, we present structural and geochemical data providing constraints to reconstruct the evolution ofthe northern Iberia paleo-margin. Field work confirms that the pre-rift Mesozoic cover is intimately associatedto mantle rocks and to thin tectonic lenses of crustal basement. It also shows that the pre-rift cover was detachedfrom its bedrock at the Keuper evaporites level and was welded to mantle rocks during their exhumation atthe foot of the hyper-extended margin. The crust/mantle detachment fault is a major shear zone characterizedby anastomosed shear bands defining a plurimetric phacoidal fabric at the top of the serpentinized mantle. Thedetachment is marked by a layer of metasomatic rocks, locally 20 meters thick, made of talc-chlorite-pyrite-richrocks that developped under greenschist facies conditions. Raman Spectroscopy on Carbonaceous Materials(RSCM), performed on the Mesozoic cover reveal that the entire sedimentary pile underwent temperatures rangingbetween 200C and 480C.We show that: (i) at the site of mantle rocks exhumation, the boudinaged pre-rift sediments have undergone drasticsyn-metamorphic thinning with the genesis of a S0/S1 foliation and, (ii) the Paleozoic basement has been ductilelydeformed, into thin tectonic lenses that remained welded to the exhumed mantle rocks. Therefore the overallcrustal rheology appears dominated by shallow levels having a ductile behavior. This rheology is related to thepresence of a thick pre- and syn-rift decoupled cover acting as an efficient thermal blanket. This new geologicaldata set highlights important characteristics of ductile-type hyper-extended passive margin that cannot be obtainedfrom the study of seismic lines. Finally, we stress that studying field analogues represents a major tool to betterunderstand the mechanisms of extreme crustal thinning associated with mantle exhumation and their structuralinheritance during tectonic inversion.
Geophysical Research Abstracts
Vienne, Austria

insu-01510103
https://hal-insu.archives-ouvertes.fr/insu-01510103

Éditeur(s) : HAL CCSD American Geophysical Union (AGU)
Résumé : Present Address : ISTO - UMR7327
International audience
The pre-rift Mesozoic sequences of the Cretaceous passive margins fossilized in the North Pyrenean Zone (NPZ) are characterized by high temperature deformation in relation with thinning of the continental basement. Our compilation of chronological and geological data confirms a clear correlation between the distribution of the highest paleotemperatures in the pre-rift sedimentary cover and the loci of extreme crustal stretching. Geological evidences such as the occurrence of peridotite bodies directly underlying metamorphic pre-rift sediments indicate an early attenuation of the rifted continental crust. This leads us to propose a mechanism of rifting involving boudinage of the continental crust. The lateral extraction of the Paleozoic basement occurred under the pre-rift cover that is decoupled on the Triassic clays and evaporates. The thermal conditions allowing coeval ductile deformation of the crust and of the pre-rift sediments leaded to the widening of basins devoid of large faulted blocks. We discuss the implications on the origin and significance of the granulites and the relations between flysch deposition and high temperature metamorphism of the pre-rift sediments. In the NPZ, Albian-Cenomanian flysch sequences were deposited synchronously with the syn-metamorphic ductile deformation of the pre-rift sequences. Since the base of the flysch deposits also recorded locally the high-temperature tectonic event, we propose an original mechanism for the evolution of the basins involving continuous deformation of the pre-rift metamorphic sediments. At the scale of the Pyrenean domain, our results suggest a strong lateral variability in the tectonic style of passive margins, in direct link with their thermic pattern
ISSN: 0278-7407

insu-01017432
https://hal-insu.archives-ouvertes.fr/insu-01017432
https://hal-insu.archives-ouvertes.fr/insu-01017432/document
https://hal-insu.archives-ouvertes.fr/insu-01017432/file/tect20164.pdf
DOI : 10.1002/2013TC003471

Éditeur(s) : HAL CCSD Springer Verlag
Résumé : International audience
Up to now, several studies have investigated estrogen receptor (ER)–estrogen response element (ERE) interaction using biosensors such as surface plasmon resonance. These strategies have aimed to understand the molecular mechanism of such interaction as well as the effect of the ligand on this interaction. These approaches start to be used to determine the mechanisms of protein/DNA interaction, in particular in the context of drug discovery or environmental applications. However, some physical and biochemical parameters (incubation time, temperature, protease inhibitor cocktail, and bovine serum albumin (BSA)) are not completely described in the literature and could deeply modify the obtained results. This paper aims to focus not only on the preliminary steps of sample preparation such as protein thawing and incubation conditions (time and temperature) but also on the evaluation of protease inhibitor cocktail and BSA effect on the measurement of ER–ERE interactions.
ISSN: 1618-2642

hal-01418341
https://hal.archives-ouvertes.fr/hal-01418341
https://hal.archives-ouvertes.fr/hal-01418341/document
https://hal.archives-ouvertes.fr/hal-01418341/file/Estrogen%20Receptor%20preparation%20effects_accepted.pdf
DOI : 10.1007/s00216-016-9967-0

Éditeur(s) : HAL CCSD Thieme Publishing
Résumé : International audience
We evaluated the eff ects of the fl uid replacement strategy on core temperature, heart rate and urine osmolality during a 27-km trail run in tropical climate. 20 well-trained runners completed a 27-km trail race in tropical conditions. They were acclimatized to these conditions. Heart rate was monitored every 5 s, while core temperature and perceived thermal and comfort sensations were recorded before, at the 11 th km, and just after the end of the race. Water intake, urine osmolality and body mass were measured before and after the race. Core temperature and the scores of perceived thermal and comfort sensations were signifi cantly higher at the 11 th km and at the end of the race compared to before the race, but not at the 11 th km compared to before the race. No participant exhibited dehydration as assessed by urine osmolality. The less the trail runners weighed, the greater the heat retention was. The less hot they felt at the end of the race, the more they lost water, and the better the performance was. The fastest runners were able to tolerate a greater variation in core temperature between the beginning and the end of the trail race with lower water intake.
ISSN: 0172-4622

hal-01152345
https://hal.univ-antilles.fr/hal-01152345
DOI : 10.1055/s-0033-1349108

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
Tectonically controlled landforms develop morphologic features that provide useful markers to investigate crustal deformation and relief growth dynamics. In this paper, we present results of morphotectonic experiments obtained with an innovative approach combining tectonic and surface processes (erosion, transport, and sedimentation), coupled with accurate model monitoring techniques. This approach allows for a qualitative and quantitative analysis of landscape evolution in response to active deformation in the three end-member geological settings: compression, extension, and strike–slip.Experimental results outline first that experimental morphologies evolve significantly at a short time scale. Numerous morphologic markers form continuously, but their lifetime is generally short because erosion and sedimentation processes tend to destroy or bury them. For the compressional setting, the formation of terraces above an active thrust appears mainly controlled by narrowing and incision of the main channel through the uplifting hanging-wall and by avulsion of deposits on fan-like bodies. Terrace formation is irregular even under steady tectonic rates and erosional conditions. Terrace deformation analysis allows retrieving the growth history of the structure and the fault slip rate evolution. For the extensional setting, the dynamics of hanging-wall sedimentary filling appears to control the position of the base level, which in turn controls footwall erosion. Two phases of relief evolution can be evidenced: the first is a phase of relief growth, and the second is a phase of upstream propagation of topographic equilibrium that is reached first in the sedimentary basin. During the phase of relief growth, the formation of triangular facets occurs by degradation of the fault scarp, and their geometry (height) becomes stationary during the phase of upstream propagation of the topographic equilibrium. For the strike–slip setting, the complex morphology of the wrench zone, composed of several interacting fault segments, enhances the interactions with the drainage network. Because of the widening of the main fault zone toward the surface, a significant amount of distributed deformation is observed along the wrench zone. Locally, where two terminations of fault segments interact, less than a quarter of the far field displacement can remain measurable using fault offsets, leading to a systematic underestimation of the real fault slip rate.These different experimental examples illustrate the great potential of the approach coupling deformation mechanisms and erosion–transport–sedimentation processes to investigate qualitatively and quantitatively the morphotectonic evolution of tectonically controlled landscapes.
ISSN: 0169-555X

hal-01243587
https://hal.archives-ouvertes.fr/hal-01243587
DOI : 10.1016/j.geomorph.2015.02.011

Éditeur(s) : HAL CCSD
Résumé : International audience
We present an overview of the Mid-Cretaceous hyper-extended rift systemexposed in the northern part of the Pyrenean mountain range. Itsinversion during the Pyrenean orogeny allows for precious observationsof the deep-seated processes occurring at the foot of distal margins.Some peculiar aspects characterizing the pre-Alpine hyper-extended domainare examined throughout the 400 km long suture that is fossilizedin the North Pyrenean Zone (NPZ). The high temperature/low pressure(HT/LP) thermal imprint of the extensional event is studied thanksto a dataset of more than hundred peak temperature measurementsby Raman spectroscopy of the carbonaceous material (RSCM). Thepre- and syn-rift metasediments are characterized by an intense, synmetamorphicductile deformation. Focusing on several key-localitiesof the NPZ, we examine the emplacement conditions of the peridotitesin response to this extreme crustal thinning. Geological evidencessuch as the occurrence of peridotite bodies directly underlying metamorphicpre-rift sediments indicate an early attenuation of the rifted continentalcrust. Moreover, syn-rift, Albian-Cenomanian flysch sequenceswere deposited synchronously with the syn-metamorphic ductile deformationof the pre-rift sequences. All along the Internal MetamorphicZone (IMZ), the base of the flysch deposits also recorded the HT tectonicevent. Such a synchronicity between geological events, which aregenerally separated in time, is not common in mountain belts. We examinehow tectonics, metamorphism and sedimentation may be activein a single basin during extension. We propose an original mechanismfor the evolution of the basins involving continuous basal extraction ofthe pre-rift metamorphic sediments. This early HT deformation eventrelates to the « phase anté-Cénomanienne » described by Pyrenean geologistssince 1930.
24 ème Réunion des sciences de la Terre 2014
Pau, France

insu-01080795
https://hal-insu.archives-ouvertes.fr/insu-01080795

Éditeur(s) : HAL CCSD Elsevier
Résumé : Kyanite and zoisite eclogites from the Limousin area in the Variscan French Massif Central (FMC) have been formed by deep subduction to 100 km depth at peak pressure-temperature conditions around 660 degrees C and 2.9 GPa. They belong to a thin tectonic unit comprising ophiolitic bodies devoid of HP-UHP markers and forming a transported suture zone now separating the two main lithotectonic units of the FMC with contrasted tectono-metamorphic features (namely the lower and upper allochthons). Composition of kyanite-eclogites is similar to supra-subduction-zone basalts found in back-arc basins or island arcs (LREE depleted, negative Nb-Ta anomalies, epsilon Nd: +6 to + 9). Zoisite eclogites have the major-element fingerprint of ultrabasic iron-rich plagioclase cumulates common in continental intrusions or forming Fe-Ti oceanic gabbros. The distribution of immobile trace-elements is however more comparable to alkaline Si-undersaturated rocks, but the Sr-Nd isotopic composition (Sr-87/Sr-86: 0.706; epsilon Nd: -3 to -5) suggests the intervention of an old radiogenic crustal component during their petrogenesis. The chemical composition of hydrous zoisite eclogites does not correspond closely to a common magmatic precursor. It is thus suggested that, by analogy with well exposed worldwide HP-UHP terranes, at least a part of the trace-element signature and the isotopic compositions are controlled by channelled fluid-rock interaction at UHP conditions, leading to localised segregation of zoisite that hosts nearly all Sr and LREE budgets of the bulk eclogite. Sr-Nd isotopic composition of these samples is thus controlled by zoisite and probably represents the isotopic composition of the fluid phase present during UHP recrystallisation. Zircons extracted from a zoisite eclogite were dated in-situ by LA-ICP-MS. Crystallisation of the magmatic precursor is bracketed between 489 and 475 Ma and the UHP event is dated at 412 +/- 10 Ma, in agreement with published ages for the Eo-Variscan HP stage in the FMC. A late resetting of the U-Pb isotopic system at 382 +/- 7 Ma is related to an anatectic high pressure-medium pressure event, well known in the Limousin area. The oceanic eclogites dated in this study are tentatively linked to the Galicia-South Brittany Lower Paleozoic Ocean; they show evidence of the existence of an intra-oceanic subduction zone at the Lower Ordovician and of partial closure of this oceanic domain by ocean-continent subduction during Early Devonian.
ISSN: 0024-4937

hal-00512835
https://hal.archives-ouvertes.fr/hal-00512835
DOI : 10.1016/j.lithos.2010.05.013