Publication Abstract

Plasma transferin polymorphisms in scad (Trachurus trachurus populations from the north east Atlantic

M.F. Borges, R.J. Turner and J. Casey

Starch gel electrophoresis of plasma transferrin phenotypes from 710 scad caught or four research vessel cruises in the North Sea, Celtic Sea, Bay of Biscay, and off the Portuguese coast was carried out in an attempt to assess the genetic identity of popu lations of this species in the north-east Atlantic. Four allelic variants are described although three of these proved to be only rare alleles, and no significant heterogeneity it the populations from all four areas was identified. These results are discussed in relatior to previous analyses of genetic polymorphisms in scad populations in this area. We conclude that, at present, the genetic evidence provides no support for the existence o genetically distinct stocks of scad in the north-east Atlantic.

Reference:

M.F. Borges, R.J. Turner and J. Casey, 1993. Plasma transferin polymorphisms in scad (Trachurus trachurus populations from the north east Atlantic. ICES Journal of Marine Science, 50: 299-301.