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Allozyme Evidence of Genetic Differentiation Between Populations of Hediste Diversicolor (Polychaeta: Nereididae) from the Western Mediterranean

Published online by Cambridge University Press:  11 May 2009

M. Abbiati  and
F. Maltagliati
M. Abbiati
Affiliation:
Dipartimento di Scienze dell'Ambiente e del Territorio, via A. Volta 6, 1–56126 Pisa, Italy
F. Maltagliati
Affiliation:
Dipartimento di Scienze dell'Ambiente e del Territorio, via A. Volta 6, 1–56126 Pisa, Italy
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Extract

The occurrence of genetic differentiation among western Mediterranean Hediste diversicolor (Polychaeta: Nereididae) populations was assessed by allozyme electrophoresis on cellulose acetate. Seventeen loci were analysed in four populations. The level of the genetic variability was markedly low (mean HL range: 0.014–0.034), but comparable to that of other brackish water nereidids. The values of Nei genetic distance index (D) confirm the existence of genetic differentiation between the geographically isolated populations at Venice, Elba, Navicelli and Serchio D range: 0.128–0.356). However, the two samples from Serchio and Navicelli, ~15 km apart, were not genetically different (D=0·00005). The level of genetic differentiation in H. diversicolor populations followed the isolation-by-distance model. Reduced gene flow among H. diversicolor populations may be explained by its limited dispersal capacity and the eco-physiological barriers that occur between different brackish habitats.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 76 , Issue 3 , August 1996 , pp. 637 - 647
Copyright
Copyright © Marine Biological Association of the United Kingdom 1996

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