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Within- and among-lake variation in shell morphology of the freshwater clam Elliptio complanata (Bivalvia: Unionidae) from south-central Ontario lakes

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Abstract

To compare the relative magnitude of variation in shell morphology within and among lakes, Elliptio complanata were collected from low and high exposure areas in each of four small lakes in south-central Ontario. Nested ANOVA's on shell length, height, width and weight revealed that shell morphology varied much more between sites of differing exposure within a lake than among lakes of differing alkalinity. Canonical variates analysis showed that clams from high exposure areas had larger and proportionately taller and heavier shells than those from low exposure areas. There was no relationship between alkalinity of lakes and shell morphology. These results suggest that the use of unionid shell morphology to predict long-term whole lake water chemistry (e.g. alkalinity) requires sampling designs which take into account within-lake variation in shell morphology.

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Authors and Affiliations

  1. Department of Zoology, University of Western Ontario, N6A 5B7, London, Ontario, Canada

    Scott G. Hinch & Robert C. Bailey

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  1. Scott G. Hinch
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  2. Robert C. Bailey
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Hinch, S.G., Bailey, R.C. Within- and among-lake variation in shell morphology of the freshwater clam Elliptio complanata (Bivalvia: Unionidae) from south-central Ontario lakes. Hydrobiologia 157, 27–32 (1988). https://doi.org/10.1007/BF00008807

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  • DOI: https://doi.org/10.1007/BF00008807

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