Annual cycle of plasma insulin and glucose of sea bass.Dicentrarchus labrax,L. |
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Authors: | J Gutiérrez J Fernández M Carrillo S Zanuy J Planas |
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Institution: | (1) Department Fisiologia Animal, Facultat de Biologia, Universitat de Barcelona, Avda. Diagonal, 645, 08028 Barcelona, Spain;(2) Instituto de Acuicicultura de Torre de la Sal, Ribera de Cabanes, Castellón, Spain |
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Abstract: | Annual plasma insulin and glucose cycles were studied inDicentrarchus labrax maintained in either seawater (37.8) or brackish water (3.5). In both media, the highest insulin levels were found during the prespawning period (August–November) coincident to increases in weight and a decrease in plasma glucose. During spawning (December–April) and postspawning (May–July) periods, the decrease in insulin occurred at the same time as a reduction in growth and an increase of plasma glucose. Temperature and salinity conditions impeded spawning in the brackish water group, in which a minor weight loss was regained more quickly than in the sea water group; insulin levels were also higher. |
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Keywords: | insulin glucose plasma annual cycle sea bass Dicentrarchus labrax size weight reproduction brackish water seawater |
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