Growth of European sea bass (Dicentrarchus labrax L.) under hypoxic and oscillating oxygen conditions.

Thetmeyer, Helmut, Waller, Uwe, Black, K.D., Inselmann, S. and Rosenthal, Harald (1999) Growth of European sea bass (Dicentrarchus labrax L.) under hypoxic and oscillating oxygen conditions. Aquaculture, 174 . pp. 355-367. DOI 10.1016/S0044-8486(99)00028-9.

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Abstract

Effects of moderate hypoxia and oscillating oxygen conditions on growth of European sea bass (Dicentrarchus labrax L.) were investigated. Groups of four to six sea bass (initial weights 40–90 g) were exposed to one of three oxygen regimes (40% air saturation; oscillations between 40–86% with a period of 770 min; 86% as a control) at 22°C and a salinity of 37 for 1 month. All fish survived and gained weight, but relative to the controls, the sea bass exposed to hypoxic conditions consumed significantly less food, exhibited a reduced growth, and had a lower condition factor. Oscillating groups were intermediate, and not statistically distinguishable from either normoxic or hypoxic treatments. Feed conversion efficiency and variation in body size were not significantly affected by oxygen conditions. Growth was correlated with feed intake, suggesting that reduced growth under moderate hypoxic or oscillating oxygen conditions is primarily due to reduced appetite and not a consequence of a decrease in feed conversion efficiency.

Document Type: Article
Keywords: Sea bass; Dicentrarchus labrax; Growth; Feeding; Hypoxia; Dissolved oxygen
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EV Marine Evolutionary Ecology
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1016/S0044-8486(99)00028-9
ISSN: 0044-8486
Projects: AIR
Expeditions/Models/Experiments:
Date Deposited: 18 Feb 2008 17:24
Last Modified: 12 Dec 2017 08:25
URI: http://oceanrep.geomar.de/id/eprint/2268

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