|
|
|
| Registros recuperados: 31 | |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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: https://archimer.ifremer.fr/doc/00283/39412/37904.pdf |
| |
|
|
| 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... |
| Tipo: Text |
|
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00513/62473/66785.pdf |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
|
| 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 |
| |
|
| |
|
| |
| Registros recuperados: 31 | |
|
|
|
