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Polar Biology

, Volume 13, Issue 3, pp 193–200 | Cite as

Reproduction in fish of the Weddell Sea

  • Guy Duhamel
  • Karl-Hermann Kock
  • Eduardo Balguerias
  • Jean-Claude Hureau
Article

Abstract

Reproductive characteristics of 28 fish species were obtained during EPOS leg 3 in the inner Weddell Sea The gonadosomatic index (GSI) of female notothenioid fish was 15–30% at spawning. GSI in males was much less. Length at first spawning was attained from c. 70% of the maximum total length onwards. As in species of the low-Antarctic Zone gonad maturation was obviously a biennial process. More species in the high-Antarctic Zone spawn in summer and winter than in the low-Antarctic Zone where spawning in autumn/winter prevails. Fecundity was positively correlated with fish length and weight among most species. Fecundity exceeds 10,000 eggs only in a few nototheniid species. Egg diameter is commonly 3.5–5.0 mm with icefish having the largest egg sizes. Eggs of most species are probably left unattended, but nest guarding was suspected in the less fecund species. The results are discussed in comparison to reproduction in notothenioid fish inhabiting the low-Antarctic Zone.

Keywords

Fish Species Reproductive Characteristic Fish Length Gonadosomatic Index Gonad Maturation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1993

Authors and Affiliations

  • Guy Duhamel
    • 1
  • Karl-Hermann Kock
    • 2
  • Eduardo Balguerias
    • 3
  • Jean-Claude Hureau
    • 1
  1. 1.Museum national d'Histoire naturelle, Ichtyologie générale et appliquéeParis Cedex 05France
  2. 2.Institut für Seefischerei, Bundesforschungsanstalt für FischereiHamburg 50Germany
  3. 3.Instituto Espanol de Oceanografia, Santa Cruz de TenerifeCanary IslandsSpain

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