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Studies on the development of the oncosphere and procercoid of Cyathocephalus truncatus (Cestoda) in the intermediate host, Gammarus pulex
Author(s) -
OKAKA CHRISTOPHER E.
Publication year - 1989
Publication title -
zoologica scripta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.204
H-Index - 64
eISSN - 1463-6409
pISSN - 0300-3256
DOI - 10.1111/j.1463-6409.1989.tb00445.x
Subject(s) - biology , gammarus pulex , pulex , cestoda , intermediate host , host (biology) , zoology , amphipoda , ecology , crustacean , helminths , daphnia
Cultured eggs of Cyathocephalus truncatus were found to develop optimally at 20°C, but they did not develop at 6°C and above. The oncosphere of the tapeworm has been seen to be a true hexacanth embryo. Specimens of the intermediate host. Gammaurs pulex , were infected by being forced to feed on pieces of lettuce leaves on which infective eggs of the tapeworm were placed. The young drveloping porocercoid was first recovered from the haemocoel of Gammarus pulex 5 days after infection. The procercoid was found to reach the infective stage within the amphipod after about ten weeks.