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Registros recuperados: 16
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A simple way of avoiding feed wastage in European seabass, Dicentrarchus labrax, under self-feeding conditions ArchiMer
Coves, Denis; Gasset, Eric; Lemarie, Gilles; Dutto, Gilbert.
Self-feeding systems allow fish to freely express feeding activity. A simple rod at the water surface can act as a trigger and provide fish with a way of obtaining pellets from a feeder. Such a rod presented to experienced European seabass, Dicentrarchus labrax, may lead to feed wastage, probably as a result of unintentional fish contacts with the trigger. Trigger protection screens have been designed to prevent fish contacting the trigger by chance, and the efficacy of such screens was tested. Nocturnal and diurnal feed delivery and feed wasted were compared under conditions where the rod was unprotected or protected by semi-cylindrical or cylindrical screens. Tests were conducted using an unrestricted self-feeding regime (reward: 0.2 g pellet per kg of...
Tipo: Text Palavras-chave: Feeding behaviour; Feed wastage; Self feeding; Fish culture; Comportement alimentaire; Gaspillage d'aliment; Auto alimentation; Élevage de poissons.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/1998/publication-867.pdf
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Collecte de naissain de pectinidés en Bretagne ArchiMer
Buestel, Dominique; Dao, Jean-claude; Lemarie, Gilles.
Since 1973 some pectinides spat collection experiments have been conducted by the Fishery team of the Brittany Oceanology Centre, on two deposits exploited by commercial fishing: the roadsted of Brest and especially the St-Brieuc Bay The experiment carried out in 1973 was the first French attempt on this group of species and the results have been very encouraging: although the technology used was rudimentary, the best collectors enabled the collection of 30 to 50 king scallops (Pecten maximus) each and of 6,000 to 8,000 scallops (Chlamys varia and Chlamys opercularis). The research protocol used enabled the determination of the sequential aspect of the fixation, and of the growth speed of the young animals. In addition, the difference between both deposits...
Tipo: Text Palavras-chave: Collecteur; Bretagne; Coquilles Saint Jacques; Pecten maximus; Reproduction; Naissain.
Ano: 1979 URL: http://archimer.ifremer.fr/doc/1979/acte-6542.pdf
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Effect of chronic ammonia exposure on growth of European seabass (Dicentrarchus labrax) juveniles ArchiMer
Lemarie, Gilles; Dosdat, Antoine; Coves, Denis; Dutto, Gilbert; Gasset, Eric; Person, Jeannine.
Chronic effects of ammonia were studied in juvenile seabass, Dicentrarchus labrax (mean weight= 11 g), exposed for 63 days to eight stable ammonia concentrations, ranging from 0.24 to 0.90 mg l(-1) unionised ammonia nitrogen (UIA-N), respectively, from 6.1 to 22.3 mg l(-1) total ammonia nitrogen (TA-N). Temperature (21.8 degreesC), pH (8.0), salinity (37.0 ppt), and oxygen concentration (over 80% saturation at the outlet) were maintained constant. Fish were fed using a self-feeder device, and they were starved during the last 8 days. Mortality of 28.9 and 42.6% occur-red within the first 8 days at the two highest UIA-N concentrations, respectively, 0.90 and 0.88 mg l(-1). From days 0 to 55, a 1.8-fold increase in weight gain was observed under the 0.90-mg...
Tipo: Text Palavras-chave: Plasma ammonia; Growth; Seabass; Chronic toxicity; Ammonia.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/publication-628.pdf
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Effect of chronic exposure to ammonia on growth, food utilisation and metabolism of the European sea bass (Dicentrarchus labrax) ArchiMer
Dosdat, Antoine; Person, Jeannine; Coves, Denis; Dutto, Gilbert; Gasset, Eric; Le Roux, Annick; Lemarie, Gilles.
The chronic effects of exposing sea bass (average initial weight 100 g) to ammonia in water at 22 degreesC were first evaluated over a 61-day period (period 1, P1) during which nine different groups were submitted to nine ambient ammonia levels ranging from 0.014 to 0.493 mg 1(-1) NH3-N (0.53-16.11 mg 1(-1) total ammonia nitrogen (TA-N)) and fed using self-feeders. At the end of P1, the fish were starved for 10 days (P2). Their recovery capacity was tested over 43 days (P3) after which the exogenous ammonia supply was stopped in all treatments and the fish were allowed to feed. After 20 days of exposure a highly significant effect of ammonia was evident from the decrease in feeding activity, voluntary feed intake (VFI) and specific growth rate (SGR), and...
Tipo: Text Palavras-chave: Sea bass; Self feeding; Compensatory growth; Chronic toxicity; Ammonia.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/2003/publication-595.pdf
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Effects of carbon dioxide and pH on growth and risk of IPN in Atlantic salmon ArchiMer
Toften, Hilde; Johansen, L.m.; Damsgard, Borge; Amesen, A.m.; Lemarie, Gilles.
Infectlous pancreatlc necrosls (IPN) Is a virus dlsease that has been an Increaslng problem for Norweglan salmon farmlng lndustry. A major question is whether there Is a causal link between reduced water quality due to Intensive production and Increased frequency Of IPN-outbreaks. In the present study, we have examlned the effects of longterm exposure to three dlfferent concentrations of carbon dloxlde (CO2) and low pH on growth and susceptlbllity to IPN virus in Atlantic salmon.
Tipo: Text
Ano: 2003 URL: http://archimer.ifremer.fr/doc/00251/36262/34811.pdf
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Effects of rearing density on sea bass (Dicentrarchus labrax) biological performance, blood parameters and disease resistance in a flow through system ArchiMer
Roque D'Orbcastel, Emmanuelle; Lemarie, Gilles; Breuil, Gilles; Petochi, Tommaso; Marino, Giovanna; Triplet, Sebastien; Dutto, Gilbert; Fivelstad, Sveinung; Coeurdacier, Jean-luc; Blancheton, Jean-paul.
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...
Tipo: Text Palavras-chave: Rearing density; Flow through system; Stress; Water quality; Sea bass.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00002/11287/7824.pdf
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Influence of an environmental parameter in seabass (Dicentrarchus labrax L.) voluntary feed intake in intensive production system. General experimental designe illustrated by the example of water ammonia nitrogen level action ArchiMer
Coves, Denis; Gasset, Eric; Lemarie, Gilles; Dutto, Gilbert.
Tipo: Text
Ano: 1996 URL: http://archimer.ifremer.fr/doc/00317/42853/42268.pdf
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Intensification of landbased aquaculture production in single pass and reuse systems ArchiMer
Blancheton, Jean-paul; Piedrahita, R.; Eding, E.h.; Lemarie, Gilles; Bergheim, A; Fivelstad, S; Roque D'Orbcastel, Emmanuelle.
Over the last 20 years, the productivity in hatcheries and farms producing fry and smolt of trout and salmon has increased substantially. These land-based farms are mainly situated along the coast and discharge effluent water directly to the sea. Such production is the basis of the recruitment of marine salmon and trout cage farms in Chile, Scotland, Norway and some other temperate countries with a coastline. Similarly, productivity and use of recirculation systems for the production of both seawater and freshwater fish has increased throughout the world. In many cases, the use of recirculation systems has ecological advantages over other technologies, especially those relying on flow through operations. The Norwegian authorities required a minimum flow...
Tipo: Text
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-6831.pdf
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Marine cage fish farming ArchiMer
Espeut, P.; Harache, Yves; Lemarie, Gilles; Ricard, Jean-marc.
Marine capture fisheries in Jamaica is primarily artisanal in nature ansd is conducted maiinly by fishermen operating from canoes. Approximately 95% of these fishermen operate on the coastal shelf and its associated banks. The commercial species harvested comprise bottom-dwelling, coral reef species and free swimming species of finfish. Other fishery resources of commercial value include marine shrimp, conch and lobsters. Catch statistics are not available for all species, but the Department of Fisheries reports a slight decline in fishery production with production decreasing from 16 milion lbs in 1990, despite the fact that fishing efforts have doubled. Over this period the number of registered fishermen has grown from 12 000 to 16 000, al of whom are...
Tipo: Text Palavras-chave: Aquaculture equipment; Cage culture; Rearing; Marine technology; Fish culture; Jamaica.
Ano: 1993 URL: http://archimer.ifremer.fr/doc/1993/rapport-1918.pdf
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Nitrogenous and phosphorous waste production in a flow-through land-based farm of European seabass (Dicentrarchus labrax) ArchiMer
Lemarie, Gilles; Martin, Jean-louis; Dutto, Gilbert; Garidou, C.
A study on nitrogenous and phosphorous waste production in European seabass (Dicentrarchus labrax) was carried out in a flow-through land-based farm. The main objectives were (i) to calculate nitrogenous (N) and phosphorous (P) waste production (particulate and dissolved) from in situ measurements for different rearing ponds with specific fish biomasses, fish sizes and flow rates, (ii) to establish nitrogenous and phosphorous waste production budgets, ratios and equations, and (iii) to compare, for the whole farm, in situ measurements to estimate N and P waste production from waste equations. Waste production was manifest by an increase in concentrations of total ammonia nitrogen, total Kjeldhal nitrogen, particulate nitrogen, dissolved phosphorus and...
Tipo: Text Palavras-chave: Fish farm waste; Excretion; Nitrogenous budget; Phosphorous budget; Dicentrarchus labrax.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/1998/publication-872.pdf
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Plasma total oxidant/antioxidant status in Dicentrarchus labrax after exposure to experimental hypoxia, hyperoxia and hypercapnia ArchiMer
Di Marco, P.; Priori, A.; Finoia, M. G.; Petochi, T.; Marino, G.; Lemarie, Gilles; Alexis, M.; Alberti, A.; Macciantelli, D..
Tipo: Text
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-6608.pdf
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Quantification of glucocorticoid receptors cDNA through real time PCR in Dicentrarchus labrax following a stress simulating experiment ArchiMer
Livi, S.; Di Marco, P.; Marino, G.; Lemarie, Gilles; Sundh, H.; Sundell, K.; Cardazzo, B.; Mininni, A.; Patarnello, T..
Tipo: Text
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-6609.pdf
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The effect of density on sea bass (Dicentrarchus labrax) performance in a tank-based recirculating system ArchiMer
Sammouth, Sophie; Roque D'Orbcastel, Emmanuelle; Gasset, Eric; Lemarie, Gilles; Breuil, Gilles; Marino, Giovanna; Coeurdacier, Jean-luc; Fivelstad, Sveinung; Blancheton, Jean-paul.
Sea bass (Dicentrarchus tabrax) (135 +/- 4 g) were reared under tank-based recirculating aquaculture system for a 63-day period at four densities: 10, 40, 70, 100 kg m(-3). Fish performance, stress indicators (plasma cortisol, proteonemia plus other blood parameters-Na+, K+, glucose, pH, total CO2- and water quality were monitored. At the end of the 63-day period, resistance to infection was also studied by a nodavirus challenge. A 25-day test was performed on fish from two extreme densities (10 and 100 kg m(3)) and one intermediate density (40 kg m(3)). With regards to the different density treatments, there was no significant difference between the daily feed intake (DFI) and the specific growth rate (SGR) up to a density of 70 kg m(-3). No significant...
Tipo: Text Palavras-chave: Welfare; Performance; European sea bass; Recirculating system; Density.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6761.pdf
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Tri d'alevins de loup et de dorade au stade juvénile (0,2 - 12 g) ArchiMer
Lemarie, Gilles; Gasset, Eric.
The authors present the necessary to sort catfish and sea bream fries in order to limit cannibalism, to constitute homogeneous groups. In the same time they studied different sorters (bars sorter, grating sorter and the conception of an experimental sorter) and their effects on the juveniles (behaviour). Introduction: In hatchery, early sorting of Sea Bass or Sea Bream fry after weaning can become necessary for several reasons: a) To obtain homogeneous batches thus simplifying growing management by better controlling: - Specific water flow for precise ranges of size or weight, - Food distribution granularity, - Daily feeding rate. b) To limit cannibalism which can become high when population dispersion is spread out. This dispersion greatly increases...
Tipo: Text Palavras-chave: Pisces; Nursery ponds; Juvenile stage; Sea bream; Catfish; Fry; Pisces; Stade juvénile; Dorade; Loup; Alevin.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/1989/rapport-1751.pdf
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Typology of individual growth in sea bass (Dicentrarchus labrax) ArchiMer
Gardeur, J; Lemarie, Gilles; Coves, Denis; Boujard, Thierry.
The individual growth variability of passive integrated transponder tagged sea bass was studied using data sets from two different experiments. In experiment 1 (n = 485), fish submitted to different photoperiod regimes were held in fourteen groups of individual weight of 88 ± 13 g (mean ± SD). In experiment 2 (n = 748, initial weight 243 ± 30 g) fish were held in fifteen groups and had either free or restricted access to diets with three lipid levels. After adjustment for treatment and tank effects, individual growth curves were analysed using multivariate analysis (principal component analysis and clustering) and were modelled using the summary statistics technique. Different growth profiles where characterized. All of them appeared to be curvilinear....
Tipo: Text Palavras-chave: Variability; Typology; Sea bass; Modelling; Growth curves; Variabilité; Typologie; Bar; Modélisation; Courbes de croissance.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/publication-548.pdf
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Water quality, feed intake and growth in European seabass (Dicentrarchus labrax L.) in relation to water renewal rate ArchiMer
Lemarie, Gilles; Toften, Hilde.
Tipo: Text
Ano: 2002 URL: http://archimer.ifremer.fr/doc/00134/24534/22566.pdf
Registros recuperados: 16
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