Haemoglobin polymorphism in Gadus morhua: Genotypic differences in haematocrit

Abstract

Haematocrit (erythrocyte/plasma ratio) values of the three common HbI genotypes were recorded in two samples totalling 149 specimens of Atlantic cod (Gadus morhua L.) caught in the Trondheimsfjord, Norway, during March-April 1984. The haematocrit values were shown to depend on both HbI genotype and sex; the females revealed higher average haematocrit values than males, and among the males the HbI-22 genotypes displayed higher average haematocrit values than the two other HbI genotypes. © 1984 Biologische Anstalt Helgoland.