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Stress-induced effects on feeding behavior and growth performance of the sea bass (Dicentrarchus labrax): A self-feeding approach

Otros títulosStress and food intake in fish
AutorLeal, Esther ; Fernández-Durán, Begoña ; Guillot, Raúl ; Ríos, Diana ; Cerdá-Reverter, José Miguel
Palabras claveStress
Feeding behavior
Food intake
Growth performance
Food conversion efficiency
Daily rhythms
Fecha de publicacióndic-2011
CitaciónComparative Biochemistry and Physiology - B - Biochemistry and Molecular Biology 181(8): 1035-1044 (2011)
ResumenRepetitive aquaculture-related protocols may act as cyclic stressors that induce chronic stress in cultured fish. The sea bass is particularly sensitive to stressful conditions and the mere presence of humans will disturb feeding behavior. In this paper, we study whether chronic stress induced by repetition of acute stress protocols affects long-term feeding behavior and growth performance in sea bass and whether exogenous cortisol may induce stress-like changes in these parameters. We demonstrate that both chronic stress and dietary cortisol decrease food intake and have a negative effect on feed conversion efficiency, severely impairing sea bass performance. Both experimental approaches induced changes in the daily feeding activity by lengthening the active feeding periods. Fish subjected to a cyclic stressor modify their daily feeding pattern in an attempt to avoid interference with the time of the stressor. The delay in feeding when fish are acutely and repeatedly stressed could be of substantial adaptive importance.
Descripción31 p., 5 figures, 2 tables and references
Versión del editorhttp://dx.doi.org/10.1007/s00360-011-0585-z
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