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A note on the intermediate hosts of the trematode Crepidostomum cooperi Hopkins, 1931, parasitic in speckled trout in some lakes and rivers of the Quebec Laurentide Park



A note on the intermediate hosts of the trematode Crepidostomum cooperi Hopkins, 1931, parasitic in speckled trout in some lakes and rivers of the Quebec Laurentide Park



Canadian Jour Zool 32(6): 375-377



In some areas of the Quebec Laurentide Park the developing larval stages of the trematode Crepidostomum cooperi were found in sphaeriid clams of the genus Pisidium (P. subtruncatum, P. compressum, P. adbitum, P. llijeborgi, and P. nitidum), and the encysted state in nymphs of the mayfly Hexagenia recurvata and in those of another species of mayfly of the genus Polymitarcys. These constitute new records of intermediate hosts for C. cooperi. Sexually mature worms were recovered from trout 3-4 weeks after the trout fed upon infected mayfly nymphs, thus confirming Hopkins' observation on the interval required by the worm to attain sexual maturity.

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A note on the intermediate hosts of the trematode, Crepidostomum cooperi Hopkins, 1931, parasitic in speckled trout Salvelinus fontinalis Mitchill in some lakes and rivers of the Quebec Laurentide Park. Canadian Journal of Zoology 32: 375-377, 1954

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