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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
Mercier, L.; Racotta, I.S.; Yepiz-Plascencia, G.; Muhlia-Almazan, A.; Civera, R.; Quinones-Arreola, M.F.; Wille, M.; Sorgeloos, P.; Palacios, E. (2009). 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. Aquac. Res. 40(16): 1849-1863. dx.doi.org/10.1111/j.1365-2109.2009.02291.x
In: Aquaculture Research. Blackwell: Oxford. ISSN 1355-557X; e-ISSN 1365-2109
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| Trefwoord |
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| Author keywords |
anion superoxide; clotting time; glucose; haemocyte; HDL-BGBP; HUFA |
| Auteurs | | Top |
- Mercier, L.
- Racotta, I.S.
- Yepiz-Plascencia, G.
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- Muhlia-Almazan, A.
- Civera, R.
- Quinones-Arreola, M.F.
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- Wille, M.
- Sorgeloos, P.
- Palacios, E.
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| Abstract |
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. |
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