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| Le Boucher, Richard; Dupont-nivet, M.; Laureau, S.; Labbe, Laurent; Geurden, I.; Medale, F.; Chatain, Beatrice; Vandeputte, Marc; Quillet, E.. |
| World fish farm production is growing rapidly. However, the supply of fishmeal and fish oil, the major ingredients of fish diets, has reached a limit because of the limits in the exploitation of wild fish stocks that cannot be increased to meet a growing demand. The main response, especially in Europe, has been the progressive replacement of fishmeal and fish oil by plant products. However, the strong reduction of growth and sometimes survival of fish fed highly substituted diets has urged research on the genetic potential for adaptation to plant-based diets. Recent results clearly demonstrate that fish can be selected for their capacity to grow when fed plant-based diets, even though the underlying mechanisms remain unknown. Genotype-diet interactions... |
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| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00200/31167/29566.pdf |
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| 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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| Wache, Yann; Auffray, Francoise; Gatesoupe, Joel; Zambonino, Jose-luis; Gayet, Vincent; Labbe, Laurent; Quentel, C. |
| Two strains of Saccharomyces cerevisiae were tested as probiotics for rainbow trout fry, during the first month of feeding. Each strain was introduced into separate diets, at the rate of 106 CFU g− 1 and their effects were compared with those of a control diet. Two rearing conditions were simultaneously compared, to test the adaptability of the probiotic treatment. From start feeding onwards, the water supply came from either spring or river, resulting in two different temperature ranges, 11¿11.5 and 7¿8 °C respectively. Growth and development were optimal in spring water, while some delay was observed with colder river water. A slight but significant increase in mortality was also observed in the river group. In all groups, the counts of... |
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Palavras-chave: Debaryomyces hansenii; Yeast; Brush border membrane; Gut maturation; Larval development; Start feeding. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1816.pdf |
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| Callet, Therese; Dupont-nivet, Mathilde; Cluzeaud, Marianne; Jaffrezic, Florence; Laloe, Denis; Kerneis, Thierry; Labbe, Laurent; Quillet, Edwige; Geurden, Inge; Mazurais, David; Skiba-cassy, Sandrine; Medale, Francoise. |
| o meet the growing demand of fish feed for aquaculture, an increasing proportion of marine ingredients are being replaced by blends of plant products. However, the total replacement of marine ingredients in salmonid diets impairs fish performance. This is particularly true during the early fry stage and this stage is therefore considered of particular importance. In rainbow trout (RBT), the existence of a genetic variability to survive and grow with plant-based diets devoid of marine ingredients has now been proved, but the mechanisms behind are little studied especially at early stage. To investigate these, we analysed the whole transcriptome of three isogenic lines of RBT fry, which have similar growth when fed a marine resources-based diet (M diet) but... |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00452/56371/57969.pdf |
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| Lallias, Delphine; Quillet, Edwige; Begout, Marie-laure; Auperin, Benoit; Khaw, Hooi Ling; Millot, Sandie; Valotaire, Claudiane; Kerneais, Thierry; Labbe, Laurent; Prunet, Patrick; Dupont-nivet, Mathilde. |
| Adaptive phenotypic plasticity is a key component of the ability of organisms to cope with changing environmental conditions. Fish have been shown to exhibit a substantial level of phenotypic plasticity in response to abiotic and biotic factors. In the present study, we investigate the link between environmental sensitivity assessed globally (revealed by phenotypic variation in body weight) and more targeted physiological and behavioral indicators that are generally used to assess the sensitivity of a fish to environmental stressors. We took advantage of original biological material, the rainbow trout isogenic lines, which allowed the disentangling of the genetic and environmental parts of the phenotypic variance. Ten lines were characterized for the... |
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| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00416/52769/53631.pdf |
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| Le Boucher, Richard; Dupont-nivet, Mathilde; Vandeputte, Marc; Kerneis, Thierry; Goardon, Lionel; Labbe, Laurent; Chatain, Beatrice; Bothaire, Marie Josee; Larroquet, Laurence; Medale, Francoise; Quillet, Edwige. |
| Genetic adaptation to dietary environments is a key process in the evolution of natural populations and is of great interest in animal breeding. In fish farming, the use of fish meal and fish oil has been widely challenged, leading to the rapidly increasing use of plant-based products in feed. However, high substitution rates impair fish health and growth in carnivorous species. We demonstrated that survival rate, mean body weight and biomass can be improved in rainbow trout (Oncorhynchus mykiss) after a single generation of selection for the ability to adapt to a totally plant-based diet (15.1%, 35.3% and 54.4%, respectively). Individual variability in the ability to adapt to major diet changes can be effectively used to promote fish welfare and a more... |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00107/21845/19429.pdf |
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| Lefevre, Florence; Cardinal, Mireille; Bugeon, Jerome; Labbe, Laurent; Medale, Francoise; Quillet, Edwige. |
| A lean muscle line (L) and a fat muscle line (F) of rainbow trout were established (Quillet et al., 2005) by a two-way selection for muscle lipid content performed on pan-size rainbow trout using a non-destructive measurement of muscle lipid content (Distell Fish Fat Meter®). The aim of the present study was to evaluate the consequences of this selective breeding on flesh quality of pan size (290 g) diploid and triploid trout after three generations of selection. Instrumental evaluations of fillet color and pH measurement were performed at slaughter. Flesh color, pH, dry matter content and mechanical resistance were measured at 48 h and 96 h postmortem on raw and cooked flesh, respectively. A sensorial profile analysis was performed on cooked fillets.... |
| Tipo: Text |
Palavras-chave: Flesh quality; Lipid content; Muscle fiber; Triploid; Fish; Texture. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00271/38246/36431.pdf |
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| Aubin, Joel; Gatesoupe, Joel; Labbe, Laurent; Lebrun, Luc. |
| Two probiotics were tested as alternative treatment to limit the prevalence of the vertebral column compression syndrome (VCCS) in rainbow trout, compared with a preventive treatment with florfenicol. Either the antibiotic, or a lactic acid bacterium, Pediococcus acidilactici, or a yeast, Saccharomyces cerevisiae var. boulardii, was introduced into experimental diets, which were compared with the control diet without supplementation. The antibiotic caused some mortality during the first week after treatment, likely because of the toxicity of the compound. However, this antibiotic treatment limited the occurrence of VCCS to 3%, vs. 13% of fish affected in the control group. Pediococcus acidilactici provided the same level of protection as the antibiotic,... |
| Tipo: Text |
Palavras-chave: Carnobacterium; Debaryomyces hansenii; Pseudomonas; Antibiotic; Lactic acid bacterium; Yeast; Spinal deformities. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-752.pdf |
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