Comparative effects of long-term hypoxia on growth, feeding and oxygen consumption in juvenile turbot and European sea bass

Type Article
Date 2001-10
Language English
Author(s) Pichavant Karine, Person Jeannine, Le Bayon Nicolas, Severe Armelle, Le Roux Annick, Boeuf Gilles
Affiliation(s) IFREMER, Ctr Brest, Physiol Poissons Lab, Stn Ressources Vivantes, F-29280 Plouzane, France.
Source Journal of Fish Biology (0022-1112) (Blackwell science), 2001-10 , Vol. 59 , N. 4 , P. 875-883
DOI 10.1006/jfbi.2001.1702
WOS© Times Cited 137
Keyword(s) Oxygen consumption, Growth, Hypoxia, Sea bass, Turbot
Abstract When juvenile turbot Scophthulmus maximus and sea bass Dicentrarchus labrax were fed to satiation, growth and food intake were depressed under hypoxia (3.2 +/- 0.3 and 4.5 +/- 0.2 mg O-2 l(-1)). However, no significant difference in growth was observed between fishes maintained in hypoxia and fed to satiation and fishes reared in normoxia (7.4 +/- 0.3 mg O-2 l(-1)) and fed restricted rations (same food intake of fishes at 3.2 mg O-2 l(-1)). Routine oxygen consumption of fishes fed to satiation was higher in normoxia than in hypoxia due to the decrease in food intake in the latter. Of the physiological parameters measured, no significant changes were observed in the two species maintained in hypoxia. This study confirms the significant interaction between environmental oxygen concentrations, feeding and growth in fishes. Decrease in food intake could be an indirect mechanism by which prolonged hypoxia reduces growth in turbot and sea bass, and may be a way to reduce energy and thus oxygen demand.
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Pichavant Karine, Person Jeannine, Le Bayon Nicolas, Severe Armelle, Le Roux Annick, Boeuf Gilles (2001). Comparative effects of long-term hypoxia on growth, feeding and oxygen consumption in juvenile turbot and European sea bass. Journal of Fish Biology, 59(4), 875-883. Publisher's official version : https://doi.org/10.1006/jfbi.2001.1702 , Open Access version : https://archimer.ifremer.fr/doc/00000/617/