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Abstract Two populations of Marenzelleria spp. from the North Sea and the Baltic Sea that had already been characterized by allozyme electrophoresis and found genetically different in 1994 were again examined in 1997. The genetic identity (I=1.0) examined in 1994 and 1997 shows that the structures of the populations of genetic Type I in the North Sea (Ringkobing Fjord) and genetic Type II in the Baltic...
Abstract Genetic differentiation between North Sea and Baltic Sea Hediste diversicolor (O.F. Mller, 1776) (Polychaeta: Nereididae) populations was studied by allozyme electrophoresis on starch gel. Thirteen loci were analyzed in eight populations. The level of genetic variation was very low (mean Ho=0.000 to 0.015). Differentiation between H. diversicolor populations is quite high (FST=0.892) and...