A STUDY OF POPULATION GENETICS IN THE EUROPEAN LOBSTER, HOMARUS GAMMARUS (DECAPODA, NEPHROPIDAE) BY IRIS ULRICH 1,3 / , JAKOB MÜLLER 2 / , CHRISTIAN SCHÜTT 1 / and FRIEDRICH BUCHHOLZ 1 / 1 / Biologische Anstalt Helgoland-AWI, Meeresstation, D-27498 Helgoland, Germany 2 / Zoologisches Institut, Universtity of Mainz, D-55099 Mainz, Germany ABSTRACT By means of an RAPD analysis, the degree of genetic variation in the European lobster, Homarus gammarus , was assessed. We focused our attention on the Helgoland population, which is isolated by its geographical location. By comparison with seven other European lobster populations we demonstrated that the Helgoland lobster is genetically widely separated from other European lobster stocks. However, all populations investigated showed high values of genetic distance, indicating that genetic exchange among European populations of Homarus gammarus may be restricted. The European lobster populations appeared to be isolated by distance since the pattern of genetic relationships re ects their geographic location. We thus suggest a distinct, genetical population structure, possibly maintained by genetic drift within relatively isolated local populations and restricted gene ow between them. This contrasts to the homogeneous population structure of the American lobster, Homarus americanus . ZUSAMMENFASSUNG Mit Hilfe der
Crustaceana – Brill
Published: Jan 1, 2001
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