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| Vagner, Marie; Zambonino-infante, Jose-luis; Mazurais, David; Imbert Auvray, Nathalie; Ouillon, Natascha; Dubillot, Emmanuel; Le Delliou, Herve; Akbar, David; Lefrancois, Christel. |
| In this study, we hypothesised that a reduction in n-3 HUFA availability for higher consumers, as expected with global change, would negatively impact the physiological performances of fish. The aim was to experimentally evaluate the effect of n-3 HUFA dietary content on cardio-respiratory performances of the golden grey mullet (Liza aurata), a microalgae grazer of high ecological importance in European coastal areas. These performances were evaluated in terms of critical swimming speed U (crit), associated oxygen consumption MO2, post-exercise oxygen consumption and calcium fluxes in cardiomyocytes. Two replicated groups of fish were fed on a rich (standard diet, SD diet: 1.2 % n-3 HUFA on dry matter basis, DMB) or a poor n-3 HUFA (low n-3 HUFA diet, LD... |
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| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00236/34752/33142.pdf |
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| Vagner, Marie; Lacoue-labarthe, Thomas; Infante, Jose-luis Zambonino; Mazurais, David; Dubillot, Emmanuel; Le Delliou, Herve; Quazuguel, Patrick; Lefrancois, Christel. |
| The objective of this study was to evaluate the combined effects of thermal acclimation and n-3 highly unsaturated fatty acids (n-3 HUFA) content of the food source on the aerobic capacities of fish in a thermal changing environment. The model used was the golden grey mullet Liza aurata, a species of high ecological importance in temperate coastal areas. For four months, fish were exposed to two food sources with contrasting n-3 HUFA contents (4.8% ecosapentaenoic acid EPA + docosahexaenoic acid DHA on the dry matter DM basis vs. 0.2% EPA+DHA on DM) combined with two acclimation temperatures (12 degrees C vs. 20 degrees C). The four experimental conditions were LH12, LH20, HH12 and HH20. Each group was then submitted to a thermal challenge consisting of... |
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| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00274/38479/36939.pdf |
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| Claireaux, Guy; Lefrancois, Christel. |
| Investigating the biological mechanisms linking environmental variability to fish production systems requires the disentangling of the interactions between habitat, environmental adaptation and fitness. Since the number of environmental variables and regulatory processes is large, straightening out the environmental influences on fish performance is intractable unless the mechanistic analysis of the 'fish-milieu' system is preceded by an understanding of the properties of that system. While revisiting the key points in our currently poorly integrated understanding of fish ecophysiology, we have highlighted the explanatory potential contained within Fry's ( Fry 1947 Univ. Toronto Stud. Biol. Ser. 55, 1 - 62) concept of metabolic scope and categorization of... |
| Tipo: Text |
Palavras-chave: Fish; Environmental adaptation; Environmental conditions; Scope for metabolic activity. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3306.pdf |
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