High rate algal pond treatment for water reuse in a marine fish recirculation system: Water purification and fish health Auteur(s) : Metaxa, Elisabeta Deviller, Genevieve Pagand, P Alliaume, C Casellas, C Blancheton, Jean-paul Éditeur(s) : Elsevier Résumé : Regardless of the degree of closure of a recirculation system, effluents are produced and replacement water is needed, which limits the possibility of locating a seawater production system away from the shoreline. At the Palavas Ifremer station, in the south of France, a High Rate Algal Pond (HRAP) was operated during several years to treat the effluent from a recirculating aquaculture system before reusing it. The effect of the HRAP-treated water on the recirculation system and on the fish was investigated and the optimal algae growing conditions were defined. The experiments were carried out in three rearing systems: one flow through, one recirculating and one recirculating with a HRAP. The water flow rate, temperature, pH and salinity conditions were similar in all systems. The effect of reusing the HRAP-treated water is very limited (1) on the functioning of the recirculation system and (2) on fish performance, but it allows a significant reduction of the dissolved inorganic nitrogen and phosphorus concentration in the rearing water. HRAP treatment reduced metal accumulation in muscle and liver of RAS fish, except for chromium and arsenic. All biomarkers presented no significant difference between systems, except for Superoxide Dismutase (SOD) and EROD, which showed a higher concentration in RAS and in both recirculating system respectively. (c) 2005 Elsevier B.V. All rights reserved. Aquaculture (0044-8486) (Elsevier), 2006-03 , Vol. 252 , N. 1 , P. 92-101 Droits : 2005 Elsevier http://archimer.ifremer.fr/doc/2006/publication-2306.pdf DOI:10.1016/j.aquaculture.2005.11.053 http://archimer.ifremer.fr/doc/00000/2306/ | Partager Voir aussi Fish health High rate algal pond Macroalgae Aquaculture effluent Recirculation aquaculture systems Télécharger |
Sécurisation des souches de crevettes d’élevage en Nouvelle-Calédonie. Résultats de la quarantaine et du conservatoire expérimental. Eléments pour la définition d’une stratégie de sécurisation des souches de crevettes en Nouvelle-Calédonie Auteur(s) : Patrois, Jacques Goyard, Emmanuel Peignon, Jean-marie Dufour, Robert Ansquer, Dominique Résumé : A new strain of L. stylirostris was introduced in New Caledonia. Quarantine facilities were set up inland using RAS and artificial seawater. After 5 months of rearing, all the 16 initial families were still represented with a 50% average survival. Three samplings for known pathogens were made during that period, all of them negative. Half the animals were taken to outdoor ponds for rearing to reproduction size when the rest was used to test different arrangements for a biosecure rearing until reproduction.
Numerous spawnings and nauplii were obtained but larval rearings could not be completed.
Different options are considered for the set up of a biosecure facility allowing the rearing and the breeding of pathogen free strains of shrimp. Afin de disposer d’une plus forte diversité génétique exploitable, des producteurs calédoniens ont, en relation avec l’Ifremer, récemment introduit d’Hawaii une autre souche de crevette de l’espèce Litopenaeus stylirostris, domestiquée et garantie exempte de pathogènes. Malgré cette garantie sanitaire, les crevettes ont été maintenues en observation dans une quarantaine tertiaire pendant cinq mois avant la sortie et l’élevage d’une moitié de l’effectif en bassins terre extérieurs. L’autre moitié a été conservée dans les installations de quarantaine comme stock de secours au cas où un problème affecterait les crevettes élevées à l’extérieur. Les installations de quarantaine ont été progressivement transformées, tout en continuant les élevages, afin de réaliser un prototype de conservatoire biosécurisé. Les crevettes ont été élevées jusqu’à la taille de géniteurs en utilisant de l’eau de mer artificielle puis de l’eau de mer naturelle traitée au chlore. Des essais de reproduction et d’élevage larvaire ont été menés et de nombreuses pontes fécondées ont été obtenues mais les élevages larvaires, à une exception, n’ont pas dépassé le stade Zoé 3. Les analyses par PCR réalisées sur les crevettes du conservatoire ont montré que les mesures et précautions sanitaires qui avaient été prises avaient préservé le statut sanitaire “sans pathogènes” initial. Cette expérience a permis de mieux cerner les problèmes qui pouvaient se poser pour la mise en place et le fonctionnement d’installations biosécurisées utilisant des circuits fermés. Ces enseignements ont servi à répertorier les principales contraintes envisageables pour la réalisation d’un futur conservatoire crevette qui viendrait conforter et sécuriser les souches actuellement disponibles en Nouvelle-Calédonie. Plusieurs options sont proposées pour les crevettes devant entrer dans le conservatoire (sans quarantaine, quarantaine tertiaire, quarantaine primaire puis secondaire) et pour le type de fonctionnement du conservatoire. Les principaux critères pour le choix du site, l’utilisation de l’eau de mer et son traitement, les systèmes de recirculation sont abordés; et des schémas d’installations de quarantaine et de conservatoire sont proposés. Droits : 2007 Ifremer http://archimer.ifremer.fr/doc/00117/22849/20659.pdf http://archimer.ifremer.fr/doc/00117/22849/ | Partager |
Effects of rearing density on sea bass (Dicentrarchus labrax) biological performance, blood parameters and disease resistance in a flow through system Auteur(s) : Roque D'Orbcastel, Emmanuelle Lemarie, Gilles Breuil, Gilles Petochi, Tommaso Marino, Giovanna Triplet, Sebastien Dutto, Gilbert Fivelstad, Sveinung Éditeur(s) : EDP Sciences Résumé : During 84 days, the effects of density on juvenile sea bass (Dicentrarchus labrax) (76 +/- 16 g) were studied in an experimental tank-based flow through system. Performance, stress response and resistance to virus infection were analysed under five stabilized rearing densities: 10, 20, 40, 70 and 100 kg m(-3). Water quality parameters (CO2, total ammonia nitrogen and O-2) were measured and maintained close to the recommended values for farmed sea bass by adjusting water renewal exchange. No significant differences were observed between density treatments, neither on stress response (cortisol) nor susceptibility to nodavirus. With regards to biological performances, the daily feed intake and specific growth rate were significantly lower in fish reared at the 100 kg m(-3) density. Results on the effects of density in sea bass reared in flow through (present study) and in recirculating aquaculture systems (RAS) (Sammouth et al. 2009) were compared as a contribution to the identification of density not affecting health and welfare in farmed sea bass. Aquatic Living Resources (0990-7440) (EDP Sciences), 2010-01 , Vol. 23 , N. 1 , P. 109-117 Droits : 2010 EDP Sciences, IFREMER, IRD http://archimer.ifremer.fr/doc/00002/11287/7824.pdf DOI:10.1051/alr/2009056 http://archimer.ifremer.fr/doc/00002/11287/ | Partager |
Status of red drum culture in the USA Auteur(s) : Arnold, C Éditeur(s) : Actes de colloques Ifremer, Tahiti, French Polynesia, 20 Feb - 4 Mar 1989, n°9, chap. 45, pp.486 Résumé : An overview of the methods of producing red drum are discussed. Although red drum culture is new compared to the culture of other species there is much interest in the production both in earthen ponds and in recirculating intensive systems. Various strategies for both methods will be discussed. This includes stocking rates, optimum growth, temperature, salinity and growth rates of red drum (Sciaenops ocellatus). Droits : info:eu-repo/semantics/openAccess http://archimer.ifremer.fr/doc/1989/acte-1480.pdf http://archimer.ifremer.fr/doc/00000/1480/ | Partager |
Is total serum protein a good indicator for welfare in reared sea bass (Dicentrarchus labrax)? Auteur(s) : Coeurdacier, Jean-luc Dutto, Gilbert Gasset, Eric Blancheton, Jean-paul Éditeur(s) : Edp Sciences S A Résumé : Reared sea bass were submitted to six stressful situations: hyperoxia with or without hypercapnia, increased stocking density in an open flow or recirculating system, transfer to another tank and nodavirus injection. The potentially negative impact of these factors on the lives of sea bass was investigated by measuring 9 water parameters and 19 fish parameters including total serum protein (TSP). TSP has already been used to evaluate stress. The present study investigates data of previous and new experiments, concentrating on the potential use of TSP as a routine indicator to assess welfare in sea bass reared on fish farms. In the current experiment, oxygen and carbon dioxide were seen to affect levels of TSP, but alterations were too erratic to enable proper comparison, probably because they are normal components of the fish environment and become toxic only by dose increase. TSP decreased when stocking density increased. After transfer to another tank, TSP decreased to 14% for three weeks and then increased during the fourth week through compensative overproduction, before returning to normal levels after 2 months. The results confirmed that transfer is an important stress factor for fish, with cumulative effects for successive transfers. TSP alteration of nodavirus-injected fish depends on the type of symptoms, which can be divided into 3 groups: (i) dying fish, in which TSP increased sharply due to over-production of protein involved in non-specific defences and inflammation, then decreased dramatically before death; (ii) whirling fish, a group that included both fish that later died, in which TSP decreased, and fish that subsequently survived, in which TSP increased due to development of specific immunity; and (iii) asymptomatic fish, in which TPS was similar to control levels and which were probably insensitive to nodavirus and/or had developed defences. In this paper, different mechanisms of TSP alteration are proposed and the interest of TSP as a field parameter is discussed. TSP is a non-destructive parameter that is robust, easy to measure everywhere and cheap, representing a suitable way of monitoring the overall welfare of fish by its regular increase. It can be used only as a "warning" of poor rearing conditions, however, and further investigations would be needed to identify the specific stress or health disorder. Aquatic Living Resources (0990-7440) (Edp Sciences S A), 2011-04 , Vol. 24 , N. 2 , P. 121-127 Droits : EDP Sciences, IFREMER, IRD 2011 http://archimer.ifremer.fr/doc/00043/15382/12740.pdf DOI:10.1051/alr/2011130 http://archimer.ifremer.fr/doc/00043/15382/ | Partager |
Selection of finfish species for aquaculture development in Martinique (FWI). Auteur(s) : Thouard, Emmanuel Soletchnik, Patrick Marion, J Éditeur(s) : Actes de colloques Ifremer, Tahiti, French Polynesia, 20 Feb - 4 Mar 1989, n°9, chap. 47, pp.499-510 Résumé : Since 1981, in Martinique, a programme of selection of fishes suitable for aquaculture has been conducted. Zootechnical and socio-economical constraints have led to the choice of three species, endemic and exotic: the palometa (Trachinotus goodei ), the red drum (Sciaenops ocellata ) and the red florida hybrid (Oreochromis sp.). Droits : info:eu-repo/semantics/openAccess http://archimer.ifremer.fr/doc/1989/acte-1492.pdf http://archimer.ifremer.fr/doc/00000/1492/ | Partager Voir aussi Trachinotus goodei Pisces Brood stocks Sea water Fresh water Recirculating systems Survival Eggs Sexual maturity Spawning Télécharger |
The evolution of the clear water hatchery system for Macrobrachium rosenbergii in the French West Indies from 1979 to 1984 Auteur(s) : Lacroix, Denis Robin, Thierry Sica Aquacole De Martinique, Aquacop, Éditeur(s) : Proceedings of 16th annual meeting of the World Mariculture Society; Orlando, Fla, USA. 13-17 Jan. 1985 Résumé : The clearwater larval rearing method for Macrobrachium rosenbergii was perfected in the french research center of Tahiti in 1977 nad carried on to improve the technique especially on recirculating system. This aquaculture is launched in Martinique by the regional council in 1976. A first "green water" hatchery is built and provides juveniles to the first ponds. Droits : Ifremer http://archimer.ifremer.fr/doc/00040/15165/12502.pdf http://archimer.ifremer.fr/doc/00040/15165/ | Partager |