イソスジエビとスジエビモドキにおけるBopyrus squillarumの寄生による影響について

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  • The Effects of the Bopyrid Parasite Bopyrus squillarum on Two Palaemonid Shrimps Palaemon pacificus and P, serrifer

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説明

The infections of the parasitic isopod Bopyrus squillarum on Palaemon pacificus and P. serrifer were studied during 1987 to 1989 in Tateyama Bay, Chiba Prefecture. One of 7913 P, pacificus and 278 of 7097 P. serrifer were infected. B. squillarum exhibits some degree of host specificity for the host P. serrifer. B. squillarum retarded the growth of the secondary characters of male hosts, such as the number of segments of the inner branch of the bifurcated outer flagellum of the antennuler, the rostral length, the exopod and the endopod of the first and the second pleopods. On the other hand, B. squillarum castrated the female host, but did not affect the secondary sexual characters.

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