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Haemoglobin polymorphism in Atlantic cod (Gadus morhua): allele frequency variation between yearclasses in a Norwegian fjord stock
Mork, J.; Sundnes, G. (1985). Haemoglobin polymorphism in Atlantic cod (Gadus morhua): allele frequency variation between yearclasses in a Norwegian fjord stock. Helgol. Meeresunters. 39(1): 55-62
In: Helgoländer Meeresuntersuchungen. Biologische Anstalt Helgoland: Hamburg. ISSN 0174-3597
Peer reviewed article  

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Trefwoorden
    Genotypes; Populatiegenetica; Gadus morhua Linnaeus, 1758 [WoRMS]; Marien

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  • Mork, J.
  • Sundnes, G.

Abstract
    A total of 262 specimens (0-, and 1-group) of Atlantic cod (G. morhua) representing 4 different yearclasses were caught in Trondheimsfjorden, Norway, during 1977-1984. They were genotyped by agar gel electrophoresis for the polymorphic haemoglobin locus HbI (Sick, 1961). The analyses revealed a highly significant (P = 0.0003) heterogeneity of HbI allele frequencies between yearclasses. The difference in the frequency of the HbI-1 allele between the first (1977) and the last (1983) yearclass amounted to 0.18 ( plus or minus 0.07). The results appear to support recent reports on considerable selection effects at HbI, and stress the unreliability of allele frequencies at this locus for use in studies of the genetic population structure of cod.

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