Protogynous Hermaphroditism in the Brackish and Freshwater Isopod, Gnorimosphaeroma naktongense : Crustacea: Isopoda, Sphaeromatidae

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概要

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• Protogynous sex change in Gnorimosphaeroma naktongense, inhabiting brackish water and freshwater bodies, was examined by culturing precopulatory guarding pairs. The transitional stages of masculinizing of a female were observed clearly after releasing juveniles from a female marsupium. About forty percent of the females cultured showed direct evidence of sex change to males in the outer morphology at the end of laboratory experiments. As histological observations were not done to make clear the processes of gonad changes, the possibility of protogynous sex change was strongly suggested. Precopulatory mate guarding may be a primary selective pressure favoring protogyny in G. naktongense.

• 1996-04-15

著者

• Abe Masatoshi

  Faculty Of Education Niigata University

• Fukuhara Haruo

  Faculty of Education, Niigata University

• Fukuhara Haruo

  Faculty Of Education Niigata University

関連論文

• Protogynous Hermaphroditism in the Brackish and Freshwater Isopod, Gnorimosphaeroma naktongense : Crustacea: Isopoda, Sphaeromatidae
• The antagonistic relationship between chlorophyll a concentrations and the growth areas of Trapa during summer in a shallow eutrophic lake

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