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Morphological variations in Mytilus from the Irish coasts in relation to the occurrence and distribution of M. Galloprovincialis Lmk
Seed, R. (1974). Morphological variations in Mytilus from the Irish coasts in relation to the occurrence and distribution of M. Galloprovincialis Lmk. Cah. Biol. Mar. 15(1): 1-25
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723, more
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    Marine

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Abstract
    The presence ofM. galloprovincialis in Ireland is confirmed. It occurs along most of the south coast and extends northwards on the west coast as far as County Donegal. However, on shores where salinity is appreciably reduced, galloprovincialis is noticeably less abundant. Both M. edulis and M. galloprovincialis exhibit considerable morphological variation according to their age and to the wide range of local conditions in which they occur. The unusually high incidence of individuals of intermediate characters in many populations, on the other hand, could possibly indicate that considerable hybridisation between these 2 mussels occurs in this part of their geographical range.

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