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Genetic structuring and gene flow in Cerastoderma glaucum (Bivalvia: Cardiidae): evidence from allozyme variation at different geographic scales
Mariani, S.; Ketmaier, V.; De Matthaeis, E. (2002). Genetic structuring and gene flow in Cerastoderma glaucum (Bivalvia: Cardiidae): evidence from allozyme variation at different geographic scales. Mar. Biol. (Berl.) 140: 687-697. https://dx.doi.org/10.1007/s00227-001-0753-x
In: Marine Biology: International Journal on Life in Oceans and Coastal Waters. Springer: Heidelberg; Berlin. ISSN 0025-3162; e-ISSN 1432-1793, meer
Peer reviewed article  

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Trefwoorden
    Bivalvia [WoRMS]; Cardiidae Lamarck, 1809 [WoRMS]; Cerastoderma glaucum (Bruguière, 1789) [WoRMS]
    Marien/Kust

Auteurs  Top 
  • Mariani, S., meer
  • Ketmaier, V.
  • De Matthaeis, E.

Abstract
    Genetic variation at 16 enzyme loci was analysed in 20 Mediterranean and 1 Baltic population of Cerastoderma glaucum. Spatial genetic variation at different geographic scales was investigated. In general, this species was fairly genetically structured (over all loci theta =0.088), according to the fragmentary nature of its habitat. Spatial structuring of genetic diversity was shown to follow different models, depending on the geographic scale considered: a stepping-stone model provided a good fit at a wide scale, with gene flow inversely related to geographic distance, whereas at small scale, genetic relationships among samples could not be interpreted as simply the effect of physical distance among populations. Results are discussed taking into account the intrinsic and extrinsic factors which are most likely to affect the patterns of genetic structuring in coastal marine animals.

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