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Registros recuperados: 27
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An early-life hypoxia event has a long-term impact on protein digestion and growth in European sea bass juvenile. ArchiMer
Zambonino, Jose-luis; Mazurais, David; Dubuc, Alexia; Queau, Pierre; Vanderplancke, Gwenaelle; Servili, Arianna; Cahu, Chantal; Le Bayon, Nicolas; Huelvan, Christine; Claireaux, Guy.
Ocean warming, eutrophication and consequent decrease in oxygen lead to smaller average fish size. Although such responses are well-known in an evolutionary context, involving multiple generations, it appears to be incompatible with current rapid environmental change. Rather, phenotypic plasticity could provide a means for marine fish to cope with rapid environmental changes. However, little is known about the mechanisms underlying plastic responses to environmental conditions that favour small phenotypes. Our aim was to investigate how and why European sea bass that had experienced a short episode of moderate hypoxia during their larval stage subsequently exhibited a growth depression at the juvenile stage compared to the control group. We examined...
Tipo: Text Palavras-chave: Climate change; Digestive enzymes; Dicentrarchus labrax; Growth; Hypoxia; Respirometry.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00373/48407/48635.pdf
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Assessing the long-term effect of exposure to dispersant-treated oil on fish health using hypoxia tolerance and temperature susceptibility as ecologically relevant biomarkers ArchiMer
Mauduit, Florian; Farrell, Anthony P.; Domenici, Paolo; Lacroix, Camille; Le Floch, Stephane; Lemaire, Pphilippe; Nicolas-kopec, Annabelle; Whittington, Mark; Le Bayon, Nicolas; Zambonino-infante, Jose-luis; Claireaux, Guy.
Consequences of exposure to polyaromatic hydrocarbons (PAH), toxic components of crude oil, on fish has been widely documented due to their ecological and economical importance. However, although forming a valuable and consistent body of knowledge, use of these data in spill response is limited. Objective of the present study was thus to facilitate the translation of published data into information of operational value. For this, we investigated the dose‐response relationship between dispersant‐treated oil exposure and ecologically‐relevant consequences by combining laboratory and field experiments. Effects were examined over almost a year using juveniles of the slow growing, commercially important European sea bass (Dicentrarchus labrax). Moreover, a...
Tipo: Text Palavras-chave: Oil spills; Polycyclic aromatic hydrocarbons (PAHs); Fish indices; Hypoxia; Temperature.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00455/56679/58438.pdf
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Calcium response of KCl-excited populations of ventricular myocytes from the European sea bass (Dicentrarchus labrax): a promising approach to integrate cell-to-cell heterogeneity in studying the cellular basis of fish cardiac performance ArchiMer
Ollivier, Helene; Marchant, James; Le Bayon, Nicolas; Servili, Arianna; Claireaux, Guy.
Climate change challenges the capacity of fishes to thrive in their habitat. However, through phenotypic diversity, they demonstrate remarkable resilience to deteriorating conditions. In fish populations, inter-individual variation in a number of fitness-determining physiological traits, including cardiac performance, is classically observed. Information about the cellular bases of inter-individual variability in cardiac performance is scarce including the possible contribution of excitation-contraction (EC) coupling. This study aimed at providing insight into EC coupling-related Ca2+ response and thermal plasticity in the European sea bass (Dicentrarchus labrax). A cell population approach was used to lay the methodological basis for identifying the...
Tipo: Text Palavras-chave: Sea bass; Myocyte populations; Calcium signaling; Cardiac plasticity; Inter-individual variability.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00283/39412/37904.pdf
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Combined effects of ocean acidification and temperature on larval and juvenile growth, development and swimming performance of European sea bass (Dicentrarchus labrax) ArchiMer
Cominassi, Louise; Moyano, Marta; Claireaux, Guy; Howald, Sarah; Mark, Felix C.; Zambonino-infante, Jose-luis; Le Bayon, Nicolas; Peck, Myron A..
Ocean acidification and ocean warming (OAW) are simultaneously occurring and could pose ecological challenges to marine life, particularly early life stages of fish that, although they are internal calcifiers, may have poorly developed acid-base regulation. This study assessed the effect of projected OAW on key fitness traits (growth, development and swimming ability) in European sea bass (Dicentrarchus labrax) larvae and juveniles. Starting at 2 days post-hatch (dph), larvae were exposed to one of three levels of PCO2 (650, 1150, 1700 μatm; pH 8.0, 7.8, 7.6) at either a cold (15°C) or warm (20°C) temperature. Growth rate, development stage and critical swimming speed (Ucrit) were repeatedly measured as sea bass grew from 0.6 to ~10.0 (cold) or ~14.0...
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Ano: 2019 URL: https://archimer.ifremer.fr/doc/00513/62473/66785.pdf
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Combined effects of water quality and stocking density on welfare and growth of rainbow trout (Oncorhynchus mykiss) ArchiMer
Person, Jeannine; Labbe, Laurent; Le Bayon, Nicolas; Severe, Armelle; Le Roux, Annick; Le Delliou, Herve; Quemener, Loic.
An 84-day experiment assessed the combined effects of two fresh water quality levels (H: 1.71 +/- 0.15 mg O(2)l(-1) and 0.28 +/- 0.01 mg l(-1) total ammonia nitrogen (T-AN), L: 5.15 +/- 0.07 mg O2l(-1) and 0.54 +/- 0.01 mg T- AN l(-1)) and 3 stabilized stocking densities: 24.8 +/- 0.2, 74.2 +/- 0.5 and 120.0 +/- 0.9 kg m(-3)) on rainbow trout. Fish were fed using demand feeders with rewards proportional to stocking density. Mass increase was significantly affected by water quality and stocking density, being highest in H water and the lowest at 120 kg m(-3). There was no significant difference in final weight between 25 and 74 kg m(-3), but at 120 kg m(-3) it was 27% and 19% lower in H and L water respectively than at 25 kg m(-3). Feed intake (FI) from day...
Tipo: Text Palavras-chave: Growth; Welfare; Stocking density; Water quality; Rainbow trout.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4555.pdf
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Comparaison de la croissance et de la mortalité de différentes familles et lignées d'huître plate Ostrea edulis en système intensif ArchiMer
Baud, Jean-pierre; Le Bayon, Nicolas; Haure, Joel; Nourry, Max; Palvadeau, Hubert; Penisson, Christian; Naciri-graven, Yamama; Goyard, Emmanuel; Barre, Marc.
As of 1985, Ifremer set up a selection programme for resistance to the protozoan Bonamia ostreae in European flat oysters (Ostrea edulis). Two selection lines, L85 and L89, from the third and second generation, respectively, were produced with 17 and 21 different families. The experimental design also included a mixed line (L85 x L89) of seven families and a control line of five families from Quiberon broodstock maintained without selection pressure.
Tipo: Text Palavras-chave: Croissance; Génétique; Huîtres plates; Ostrea edulis.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/1997/acte-3245.pdf
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Comparative effects of long-term hypoxia on growth, feeding and oxygen consumption in juvenile turbot and European sea bass ArchiMer
Pichavant, Karine; Person, Jeannine; Le Bayon, Nicolas; Severe, Armelle; Le Roux, Annick; Boeuf, Gilles.
When juvenile turbot Scophthulmus maximus and sea bass Dicentrarchus labrax were fed to satiation, growth and food intake were depressed under hypoxia (3.2 +/- 0.3 and 4.5 +/- 0.2 mg O-2 l(-1)). However, no significant difference in growth was observed between fishes maintained in hypoxia and fed to satiation and fishes reared in normoxia (7.4 +/- 0.3 mg O-2 l(-1)) and fed restricted rations (same food intake of fishes at 3.2 mg O-2 l(-1)). Routine oxygen consumption of fishes fed to satiation was higher in normoxia than in hypoxia due to the decrease in food intake in the latter. Of the physiological parameters measured, no significant changes were observed in the two species maintained in hypoxia. This study confirms the significant interaction between...
Tipo: Text Palavras-chave: Oxygen consumption; Growth; Hypoxia; Sea bass; Turbot.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/publication-617.pdf
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Comparative growth and welfare in rainbow trout reared in recirculating and flow through rearing systems ArchiMer
Roque D'Orbcastel, Emmanuelle; Person, Jeannine; Le Bayon, Nicolas; Blancheton, Jean-paul.
The objective of this study was to compare fish performance and welfare at different stocking densities in a recirculating system (RS) and a flow through system (FTS) under field conditions. During the 77 days experiment, the fish survival rate was high (99.3%) and stocking density increased from 57 to 98108 kg m(-3). No significant differences in growth were observed between RS and FTS until day 56. Later, growth decreased in the FTS, while it remained similar to the farm reference at 50 kg m(-3) in the RS. Final weight was 17% higher in RS than in FTS. The maximum carrying capacity of the RS was near 100 kg m(-3), limited by NO2 increase up to safe level at the end of the experiment, the maximum carrying capacity of the FTS was near 85 kg m(-3), probably...
Tipo: Text Palavras-chave: Welfare; Fin; Performance; Stocking density; Recirculating system.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6509.pdf
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Contrôle des performances des souches d'huîtres plates résistantes au protozoaire Bonamia ostreae 2ème année ArchiMer
Haure, Joel; Nourry, Max; Le Bayon, Nicolas; Baud, Jean-pierre.
Un contrôle des performances de souches d'huîtres plates, Ostrea edulis, issues d'un plan de sélection a été réalisé d'avril à novembre 1995 en élevage intensif. Un débit d'eau de mer fixé à 4l/heure/huître et un apport nutritif (Skeletonema costatum) de 3.10(9) cellules/jour/huître semblent constituer un bon compromis pour satisfaire les exigences physiologiques de l'huître plate. Les lots d'huîtres résistantes ou tolérantes à Bonamia ostreae présentent de meilleures performances de croissance que les lots témoins. Une hiérarchisation de la croissance validée sur le plan statistique a été mise en évidence comme suit : R6 (F0*F1) > R7 (F1*F2) > Q (lot témoin). La plupart des huîtres ont été infestées par le ver Polydora, malgré le traitement à la...
Tipo: Text Palavras-chave: Génétique quantitative; Ostrea edulis; Bonamia ostreae; Souche résistante.
Ano: 1996 URL: http://archimer.ifremer.fr/doc/00048/15875/13297.pdf
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Debrominated and hydroxylated metabolites of individual polybrominated diphenyl ethers (PBDEs) in juvenile common sole (Solea solea) ArchiMer
Munschy, Catherine; Heas-moisan, Karine; Tixier, Celine; Buchet, Vincent; Le Bayon, Nicolas.
Tipo: Text
Ano: 2009 URL: http://archimer.ifremer.fr/doc/00077/18865/16444.pdf
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Dietary exposure of juvenile common sole (Solea solea L.) to polybrominated diphenyl ethers (PBDEs): Part 1. Bioaccumulation and elimination kinetics of individual congeners and their debrominated metabolites ArchiMer
Munschy, Catherine; Moisan, Karine; Tixier, Celine; Olivier, Nathalie; Gastineau, Olivier; Le Bayon, Nicolas; Buchet, Vincent.
The uptake and elimination of six PBDE congeners (BDE-28, -47, -99, -100, -153, -209) were studied in juvenile common sole (Solea solea L) exposed to spiked contaminated food over a three-month period, then depurated over a five-month period. The results show that all of the studied PBDEs accumulate in fish tissues, including the higher brominated congener BDE-209. Several additional PBDE congeners were identified in the tissues of exposed fish, revealing PBDE transformation, mainly via debromination. The identified congeners originating from PBDE debromination include BDE-49 and BDE-202 and a series of unidentified tetra-, penta-, and hepta- BDEs. Contaminant assimilation efficiencies (AEs) were related to their hydrophobicity (log K-ow) and influenced by...
Tipo: Text Palavras-chave: Marine flatfish; PBDEs; Bioaccumulation; Biotransformation; Debromination.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00021/13188/11296.pdf
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Does dietary n-3 highly unsaturated fatty acids level influence the European sea bass (Dicentrachus labrax) capacity to adapt to a high temperature? ArchiMer
Person, Jeannine; Skalli, Ali; Dulau, Barbara; Le Bayon, Nicolas; Le Delliou, Herve; Robin, Jean.
Triplicate groups of European sea bass juveniles (60 g) were fed for 84 days two experimental diets containing either vegetable or marine oil (0.4 and 2.2% n-3 highly unsaturated fatty acid [n-3 HUFA] dry matter in LD and HD, respectively) and held at 22 or 29 degreesC (LD-22, LD-29, HD-22 and HD-29 groups). Significant differences in mass gain between the two diets and temperatures were, observed from day 28 onwards, and on day 84, weight was 18% higher in the HD-29 group than in the LD-22 group (the highest and lowest values. respectively). Over the 84-day period-SGR was significantly affected both by temperatures and diets (P=6x10(-4) and 2x10(-4) respectively), averaging 1.01 and 1.07 in the HD-22 and HD-29 groups compared to 0.92 and 1.0 in the LD-22...
Tipo: Text Palavras-chave: Oxygen consumption; Fatty acid composition; Growth; Temperature; N 3 HUFA; European sea bass.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/publication-502.pdf
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Effects of dietary tannin on growth, feed utilization and digestibility, and carcass composition in juvenile European seabass ( Dicentrarchus labrax L.) ArchiMer
Omnes, Marie-helene; Le Goasduff, Julien; Le Delliou, Herve; Le Bayon, Nicolas; Quazuguel, Patrick; Robin, Jean.
Plant-based products in fish diets are valuable protein alternatives to fishmeal for the aquafeed industry. Many plant feed ingredients contain polyphenolic compounds, including tannins, which can have beneficial or adverse effects. The tolerable threshold of ingested tannins is unknown for marine carnivorous fishes. We studied the effects of tannic acid (TA) supplementation to the diet of juvenile European seabass (Dicentrarchus labrax) by measuring growth, feed utilization and digestibility, and carcass composition. We randomly allocated groups of fish (initial mean body weight of 10.2 ± 0.7 g; n = 40 fish per tank) to 12 replicate cylindrical-conical tanks (three per treatment). The fish were assigned to one of four dietary treatments for five weeks:...
Tipo: Text Palavras-chave: Dicentrarchus labrax; Polyphenolic tannin; Growth; Digestibility; Carcass composition.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00374/48478/48767.pdf
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Effects of O-2 supersaturation on metabolism and growth in juvenile turbot (Scophthalmus maximus L.) ArchiMer
Person, Jeannine; Pichavant, Karine; Vacher, Coralie; Le Bayon, Nicolas; Severe, Armelle; Boeuf, Gilles.
Effects of O-2 supersaturation on metabolism and growth were studied in juvenile turbot (Scophthalmus maximus L.). When fish were reared for 30 days in water containing O-2 at 147% or 223% air saturation, there were no significant differences in food intake, growth, food conversion or protein utilization compared to fish exposed to normoxia (100% air saturation in water outlet). Exposure to hyperoxia resulted in increased body fat deposition. Daily rates of O-2 consumption of resting fish were not affected by O-2-concentrations, and there were no significant differences in rates of nitrogenous excretion among fish exposed to the different O-2-concentrations. Turbot tolerated severe hyperoxia, 350% air saturation, for 10 days.There were changes in acid-base...
Tipo: Text Palavras-chave: Ion regulation; Acid base; Metabolism; Growth; Hyperoxia; Turbot.
Ano: 2002 URL: http://archimer.ifremer.fr/doc/2002/publication-627.pdf
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Effects of repeated hypoxic shocks on growth and metabolism of turbot juveniles ArchiMer
Person, Jeannine; Lacut, Anne-sophie; Le Bayon, Nicolas; Le Roux, Annick; Pichavant, Karine; Quemener, Loic.
Turbot juveniles (45 g) were exposed for 41 d (17 C, 34parts per thousand salinity) to constant normoxic (100-100% air saturation, 100-100) or moderate hypoxic (75-75% air saturation, 75-75) conditions and to repeated hypoxic shocks (20% saturation for 1 h, 5 d per week) from normoxic (100-20% air saturation. 100-20) or moderate hypoxic (75-20% air saturation, 75-20) conditions. A normoxic group was feed restricted (100-FR). Mass increase of 100-100 and 75-75 groups fed to satiation was not significantly different. In comparison, it was significantly lower in the 100-20 and 75-20 groups (NS between the two hypoxic shocks groups). Intermediate results were obtained in the 100-100-FR group. The lowest mass increase under hypoxic shocks was explained by a...
Tipo: Text Palavras-chave: Turbot; Metabolism; Growth; Hypoxic shock.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/2003/publication-571.pdf
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Effects of temperature on growth and metabolism in a Mediterranean population of European sea bass, Dicentrarchus labrax ArchiMer
Person, Jeannine; Mahe, Kelig; Le Bayon, Nicolas; Le Delliou, Herve.
Growth and metabolism of juvenile European sea bass of a Western Mediterranean population were assessed at six constant temperatures (13, 16, 19, 22, 25 or 29 degreesC) in an 84-day trial. Duplicated groups of 84 fish (initial weight 80 I g) were held under O-2-concentrations close to saturation (87 mg l(-1)) and were fed to satiation. Mass gain increased as temperature increased from 13 to 25 degreesC. At 25 and 29 degreesC, growth was similar up to day 72, but a 6% decrease was observed by day 84 at 29 degreesC. Days 0-84 specific growth rates (SGR) were 0.45%,1.29% and 1.21% day(-1) at 13, 25 and 29 degreesC, respectively. The estimated temperature (7) for maximum SGR was 26 degreesC (SGR = 1.715 - 0.322T + 0.022T(2) - 4.233e(-4)T(3)). Feed intake (FI)...
Tipo: Text Palavras-chave: Oxygen consumption; Fish culture; Thermal requirement; Metabolic rate; Feeding.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/publication-626.pdf
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Effects of temperature, stocking density and farming conditions on fin damage in European sea bass (Dicentrarchus labrax) ArchiMer
Person, Jeannine; Le Bayon, Nicolas.
This paper presents a non invasive, rapid and reliable way to quantitatively assess fin erosion in sea bass (Dicentrarchus labrax). The method is based on a visual assessment of fin profile and area loss of all fins except the anterior dorsal, on a scale from 0 to 4 in comparison with a perfect fin. The effects of stocking density (SD) and temperature on fin damage were investigated under experimental conditions (100-250 g fish). Over a 4-month period, mean erosion index (mean erosion level of all fins) was 10 times higher at 120 than at 20 kg m(-3), where most fins were undamaged. Damage was also dependent on time and oxygen concentration (35% lower at 53% O-2 saturation than at 105%). Fin condition was also affected by temperature: mean erosion index was...
Tipo: Text Palavras-chave: Rearing systems; Stocking density; Temperature; Welfare; Fin damage; Sea bass.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6873.pdf
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Food deprivation reduces social interest in the European sea bass Dicentrarchus labrax ArchiMer
Aimon, Cassandre; Le Bayon, Nicolas; Le Floch, Stephane; Claireaux, Guy.
Periods of food deprivation up to several months are common features for fishes and in such conditions, fitness will be determined by their capacity to maximize food encounter while minimizing predation risk. In this context, the propensity to take risk and the willingness to associate with conspecifics are particularly important as they contribute to alleviating the trade-off between predation avoidance and foraging efficiency. This study examined to what extent food deprivation modulates fish risk-taking and social behaviours, as well as the relationship between them. To address these issues juvenile European sea bass were either fed daily with a maintenance ration or food-deprived during 3 weeks. Risk-taking and sociability were assessed through...
Tipo: Text Palavras-chave: Behaviour; Teleost fish; Exploratory activity; Sociability; Risk taking; Behavioural interaction.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00474/58552/62391.pdf
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How to assess fin damage in rainbow trout, Oncorhynchus mykiss? ArchiMer
Person, Jeannine; Le Bayon, Nicolas; Gros, Sylvie.
Fin condition was examined in 100-500 g hatchery-reared rainbow trout sampled in a large range of environmental conditions of an experimental farm. A method that is simple to use, requires little training, and does not need costly sophisticated equipment or reference to a model is proposed to assess fin erosion (defined as a decrease in size and profile alteration of fins). A procedure to reliably measure the length of the longest ray present in two selected fins (dorsal and pectoral) is described. Fin general profile is assessed using five levels of erosion based on the precise rank of intact or eroded rays to limit subjective bias. The suitability of the two descriptors of fin erosion under laboratory, farm or field conditions is discussed.
Tipo: Text Palavras-chave: Fin erosion; Oncorhynchus mykiss; Rainbow trout.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-2585.pdf
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Impact of essential fatty acid deficiency and temperature on tissues' fatty acid composition of European sea bass (Dicentrarchus labrax) ArchiMer
Skalli, Ali; Robin, Jean; Le Bayon, Nicolas; Le Delliou, Herve; Person, Jeannine.
The effects of essential fatty acid deficiency and temperature on the fatty acid profiles of polar lipids (PL) and neutral lipids (NL) from various tissues (muscle, liver, gills, eyes and brain) of European sea bass juveniles were compared in a two factorial design. Fish (60 g) were held for 84 days at 22 or 29 C (upper limit for growth) and fed either at a lower or a higher level than n-3 HUFA minimal requirement for growth (0.4% and 2.2% n-3 HUFA dry matter for diets LD and HD, respectively). Essential fatty acid deficiency had a major influence on fatty acids in NL fraction of all tissues, a more moderate influence on PL of muscle, liver and gills, while a low and very low diet influence was observed on eyes and brain PL fatty acid content,...
Tipo: Text Palavras-chave: Tissue fatty acid composition; Temperature; N 3 HUFA; European sea bass.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-1688.pdf
Registros recuperados: 27
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