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Allozyme evidence of genetic differentiation between populations of Hediste diversicolor (Polychaeta: Nereididae) from the western Mediterranean Abbiati, M.; Maltagliati, F. (1996). Allozyme evidence of genetic differentiation between populations of Hediste diversicolor (Polychaeta: Nereididae) from the western Mediterranean. J. Mar. Biol. Ass. U.K. 76: 637-647. https://dx.doi.org/10.1017/S0025315400031349 In: Journal of the Marine Biological Association of the United Kingdom. Cambridge University Press/Marine Biological Association of the United Kingdom: Cambridge. ISSN 0025-3154; e-ISSN 1469-7769, meer

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Trefwoorden

Enzymes > Allozymes Genetic diversity MED, Western Mediterranean [Marine Regions] Marien/Kust

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Abbiati, M., meer Maltagliati, F., meer

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Abstract

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 H-L 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, similar to 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.

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