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Provedor de dados:  ArchiMer
País:  France
Título:  Effect of diets containing different levels of highly unsaturated fatty acids on physiological and immune responses in Pacific whiteleg shrimp Litopenaeus vannamei (Boone) exposed to handling stress
Autores:  Mercier, Laurence
Racotta, Ilie
Yepiz-plascencia, Gloria
Muhlia-almazan, Adriana
Civera, Roberto
Quinones-arreola, Marcos F.
Wille, Mathieu
Sorgeloos, Patrick
Palacios, Elena
Data:  2009-11
Ano:  2009
Palavras-chave:  Anion superoxide
Clotting time
Resumo:  Juveniles fed a diet containing a low or a high level of highly unsaturated fatty acids (HUFA) for 38 days were exposed to handling stress. In a first experiment, stress was applied daily for 30 days, after which the physiological and immunological variables were measured, whereas in a second experiment, stress was applied once and samples were obtained 1 and 24 h after the stressor event. Shrimp that were stressed for 30 days showed significantly lower survival, final weight and feed consumption compared with unstressed shrimp. The concentration of the high-density lipoprotein beta-glucan-binding protein was significantly higher in shrimp fed the high-HUFA diet. The glucose concentration in the haemolymph was significantly higher in long-term stressed shrimp compared to controls. The lactate level in the haemolymph was significantly lower in shrimp fed the high-HUFA diet. Lactate and glucose in the haemolymph increased in the 1-h stressed shrimp, but returned to normal levels in 24-h stressed shrimp. A negative effect of repeated-handling stress applied for 30 days was mainly observed on biological performance, whereas the single-stressor event had a more pronounced effect on shrimp physiological and immune responses measured 1 and 24 h after the stressor. A beneficial role of enrichment with HUFA on tolerance to handling stress was observed on immune response capacity.
Tipo:  Text
Idioma:  Inglês

Editor:  Wiley-blackwell Publishing, Inc
Formato:  application/pdf
Fonte:  Aquaculture Research (1355-557X) (Wiley-blackwell Publishing, Inc), 2009-11 , Vol. 40 , N. 16 , P. 1849-1863
Direitos:  2009 Wiley-blackwell Publishing, Inc

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