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Gigantism and Variation in Peringia ulvœ Pennant 1777, caused by Infection with Larval Trematodes

Published online by Cambridge University Press:  11 May 2009

Miriam Rothschild
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Extract

In 1933 an examination of Peringia ulvœ for larval trematodes was under-taken at Plymouth (Rothschild, 1936). No actual measurements were made at the time, but there appeared to be a relation between the species of trematode and the size of the individual infected snails. Thus the commonest species, Cercaria oocysta Lebour, 1907 (14% infection), and C. ubiquita Lebour, 1907 (4% infection), were found in 75% of the largest snails, while the rarer species, such as C. ephemera Lebour, 1907 (non Nitsch) (2% infection), and C. pirum Lebour, 1907 (0–1% infection), occurred most frequently in medium sized individuals.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 20 , Issue 3 , March 1936 , pp. 537 - 546
Copyright
Copyright © Marine Biological Association of the United Kingdom 1936

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References

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