Fish Physiology and Biochemistry

, Volume 4, Issue 3, pp 137–141 | Cite as

Annual cycle of plasma insulin and glucose of sea bass.Dicentrarchus labrax, L.

  • J. Gutiérrez
  • J. Fernández
  • M. Carrillo
  • S. Zanuy
  • J. Planas
Article

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.

Keywords

insulin glucose plasma annual cycle sea bass Dicentrarchus labrax size weight reproduction brackish water seawater 
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Copyright information

© Kugler Publications 1987

Authors and Affiliations

  • J. Gutiérrez
    • 1
  • J. Fernández
    • 1
  • M. Carrillo
    • 2
  • S. Zanuy
    • 2
  • J. Planas
    • 1
  1. 1.Department Fisiologia Animal, Facultat de BiologiaUniversitat de BarcelonaBarcelonaSpain
  2. 2.Instituto de Acuicicultura de Torre de la SalCastellónSpain

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