Allozyme data and scallop stock identification

Abstract

Scallop fishery management models require information about the degree of genetic isolation of "stocks" and recruitment into beds within those stocks. The principles behind the gathering of allozyme data are presented in this paper, and evidence is put forward to show that these data have proved useful for Demonstrating significant population differentiation in the queen scallop (Aequipecten (Chlamys) opercularis). However, a survey of populations of Pecten maximus has not revealed similar heterogeneity and, furthermore, knowledge on scallop recruitment at a local level cannot usually be deduced from allozyme data. Data from electrophoretic surveys of other scallop species are briefly discussed, and it is concluded that although allozyme data still have a role to play, they are best included within a multidisciplinary, biological/oceanographical approach to stock recruitment and identification. © 1991 Conseil International pour l’Exploration de la Mer.