Variation in genetic traits of the Baltic clam Macoma balthica from a tidal gradient in the subarctic

In a subarctic tidal gradient, strong heterogeneity in genetic traits of the Baltic clam Macoma balthica was found. The heterogeneity was stronger within the intertidal gradient, over a distance of only about 60 m, than along a horizontal gradient over a distance of 1200km in clams from the west Eur...

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Bibliographic Details
Published inPolar biology Vol. 19; no. 5; pp. 342 - 347
Main Authors Hummel, Herman, Günther, Carmen-Pia, Bogaards, Roelof H., Fedyakov, Vyacheslav
Format Journal Article
LanguageEnglish
Published Heidelberg Springer Nature B.V 01.04.1998
Subjects
Aquaculture
Genetics
Heterogeneity
Macoma balthica
Marine
Marine biology
Mollusks
PNE, White Sea
PNE, Russia
ANE, Baltic Sea
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Summary:In a subarctic tidal gradient, strong heterogeneity in genetic traits of the Baltic clam Macoma balthica was found. The heterogeneity was stronger within the intertidal gradient, over a distance of only about 60 m, than along a horizontal gradient over a distance of 1200km in clams from the west European coast. For the locus Idh1 and the average heterozygosity, a tidal cline was found. The frequency of allele Idh1-B decreased with tidal level, whereas the frequency of allele Idh1-C, as well as the average heterozygosity, increased. The possibility is discussed that the strong genetic heterogeneity and tidal clines are caused by differential selection related to the (subarctic) temperatures to which the higher tidal zones are more exposed.[PUBLICATION ABSTRACT]
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ISSN:0722-4060
1432-2056
DOI:10.1007/s003000050256