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Development of benedenia hoshinai monogenea with some notes on its occurrence on the host

Nippon Suisan Gakkaishi 50(12): 2005-2012

Development of benedenia hoshinai monogenea with some notes on its occurrence on the host

A description is given of the development as well as some notes on the biology of B. hoshinai Ogawa, 1984, a monogenean parasite of the Japanese striped knifejaw Oplegnathus fasciatus (Japanese name, ishi-dai). The oncomiracidium, 0.3-0.4 mm long, attaches itself directly to the body surface and fins of the host. Adult worms are .apprx. .gtoreq. 3.5 mm long and are most abundant on the tail fin, dorsal soft fin rays and postero-dorsal side of the body. The hard parts (2 pairs of hamuli and the supplementary pieces) show a clear relative growth to the parasite body length, and continue to grow even in adults. The number of worms on the host sharply decreased as they grew > 1.5 mm long, suggesting that most small worms detach themselves from the host before reaches that size.

Accession: 005132712

DOI: 10.2331/suisan.50.2005

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