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Spatio-temporal genetic structure and gene flow between two distinct shell morphs of the planktonic developing periwinkle Littorina striata (Mollusca:Prosobranchia)

1998; Inter-Research; Volume: 163; Linguagem: Inglês

10.3354/meps163155

1616-1599

Hans Wolf, Thierry Backeljau, R. Verhagen,

Marine Ecology and Invasive Species

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 163:155-163 (1998) - doi:10.3354/meps163155 Spatio-temporal genetic structure and gene flow between two distinct shell morphs of the planktonic developing periwinkle Littorina striata (Mollusca: Prosobranchia) Hans De Wolf1,*, Thierry Backeljau2, Ron Verhagen1 1Evolutionary Biology Group, University of Antwerp (RUCA), Groenenborgerlaan 171, B-2020 Antwerp, Belgium 2Royal Belgian Institute of Natural Sciences (KBIN), Vautierstraat 29, B-1000 Brussels, Belgium *E-mail: dewolf@ruca.ua.ac.be The planktonic developing periwinkle Littorina striata produces both nodulose and smooth shells, which were originally regarded as 2 separate species. Although both morphs occur microsympatrically, their distribution is not random. Nodulose shells predominate at wave-sheltered sites, whereas smooth shells are more common at wave-exposed sites. The degree of genetic similarity between the 2 shell types and their microgeographic spatio-temporal genetic structuring were investigated using allozyme electrophoresis. This indicated that: (1) both morphs share a common gene pool, (2) gene flow between populations is high and of comparable magnitude to gene flow between both morphs, (3) the population genetic structure of L. striata remains stable over a sampling period of 3 yr, and (4) genetic and morphological distances between populations are not correlated. These results thus confirm the conspecific status of the 2 shell types and suggest that shell variability and spatial patterning in L. striata persist in the presence of intense gene flow. Littorina striata · Planktonic development · Gene flow · Spatio-temporal variation · Shell morphology · Allozymes Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 163. Publication date: March 12, 1998 Print ISSN:0171-8630; Online ISSN:1616-1599 Copyright © 1998 Inter-Research.