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Haemoglobin polymorphism in Gadus morhua: Genotypic differences in maturing age and within-season gonad maturation
Mork, J.; Giskeödegård, R.; Sundnes, G. (1983). Haemoglobin polymorphism in Gadus morhua: Genotypic differences in maturing age and within-season gonad maturation. Helgol. Meeresunters. 36: 313-322
In: Helgoländer Meeresuntersuchungen. Biologische Anstalt Helgoland: Hamburg. ISSN 0174-3597, more
Peer reviewed article  

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Keywords
    Fishing mortality; Genotypes; Haemoglobins; Polymorphism; Polymorphism; Population genetics; Sexual maturity; Gadus morhua Linnaeus, 1758 [WoRMS]; ANE, Norway, Trondheimsfjord [Marine Regions]; Marine

Authors  Top 
  • Mork, J.
  • Giskeödegård, R.
  • Sundnes, G.

Abstract
    276 specimens of Atlantic cod (Gadus morhua L.) were caught during spawning in a restricted area of the Trondheimsfjord, Norway, in April and May 1979. Genotypes at the polymorphic haemoglobin locus Hb1 differed significantly with respect to mean age at maturation (in males) and mean gonadic development stage (in females). There was no indication of population mixing in the genotypic composition at Hb1 or at any of the 4 polymorphic tissue enzyme loci investigated (LDH-3, IDH-1, PGM, and PGI-1). The findings obtained were considered with regard to temperature-related differences in the functional properties of Hb1 molecules, and genotypic differences in growth, age at maturation, and fishing mortality.

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