HOMOGENEOUS GENETIC-STRUCTURE OF MEGANYCTIPHANES NORVEGICA (EUPHAUSIACEA) IN THE NORTHEAST ATLANTIC-OCEAN, AS INTERPRETED FROM ALLOZYMIC VARIATION

In order to elucidate the possible existence of genetically separated stocks of Meganyctiphanes norvegica in the north-east Atlantic Ocean, a population genetic analysis of the species was commenced. In particu lar we wanted to investigate how possible genetic cohesiveness between samples corresponds to the physical oceanographic structure in the re gion. An electrophoretic analysis of allele distributions at five enzy me loci identified in previous studies as being polymorphic was screen ed for variation between samples. 1 043 individuals from eight locatio ns were studied and with the genetic resolution attained with allozyme s on the loci studied, samples appear to represent a single panmictic population.