Chromosomes of the Great Blue Shark Prionace glauce (Linnaeus)

Abstract

The chromosome study was carried out on one male of the great blue shark, Prionace glauca (Linnaeus) collected by drifting gill-net in the North Pacific Ocean. The chromosome number was determined as n=39 in the spermatocytes, and 2n=78 in the spermatogonia and gill tissues. From our karyotype analysis, the chromosomes in the spermatogonium were classfied into 4 groupes on the bases of their length and position of constriction, and those in the gill cell into 5 groups on the bases of their position of centromere or constriction.