Differences in the shell shape of Lymnaea peregra (müller) (gastropoda : Pulmonata) from lotic and lentic habitats; environmental or genetic variance?

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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  • P. K S Lam
  • P. Calow


Original languageEnglish
Pages (from-to)197-207
Journal / PublicationJournal of Molluscan Studies
Issue number2
Publication statusPublished - May 1988
Externally publishedYes


Lymnaea peregra from lotic habitats (running waters) had larger aperture-length/shell-length ratios than contemporaries from lentic sites (standing waters). This pattern was observed in field samples from two separate years (1985 and 1986). Laboratory culture experiments suggested that shell shape could be genetically determined in at least some populations. We hypothesize that lotic snails possess bigger feet, and hence larger apertures than lentic individuals as an adaptation to withstand water current © 1988 The Malacological Society of London.