Comparative developmental staging of female and male water fleas daphnia pulex and daphnia magna during embryogenesis

Kenji Toyota, Chizue Hiruta, Yukiko Ogino, Shinichi Miyagawa, Tetsuro Okamura, Yuta Onishi, Norihisa Tatarazako, Taisen Iguchi

研究成果: Contribution to journalArticle査読

12 被引用数 (Scopus)

抄録

The freshwater crustacean genus Daphnia has been used extensively in ecological, developmental and ecotoxicological studies. Daphnids produce only female offspring by parthenogenesis under favorable conditions, but in response to various unfavorable conditions and external stimuli, they produce male offspring. Although we reported that exogenous exposure to juvenile hormones and their analogs can induce male offspring even under female-producing conditions, we recently established a male induction system in the Daphnia pulex WTN6 strain simply by changing day-length. This male and female induction system is suitable for understanding the innate mechanisms of sexual dimorphic development in daphnids. Embryogenesis has been described as a normal plate (developmental staging) in various daphnid species; however, all studies have mainly focused on female development. Here, we describe the developmental staging of both sexes during embryogenesis in two representative daphnids, D. pulex and D. magna, based on microscopic time-course observations. Our findings provide the first detailed insights into male embryogenesis in both species, and contribute to the elucidation of the mechanisms underlying sexual differentiation in daphnids.

本文言語英語
ページ(範囲)31-37
ページ数7
ジャーナルZoological science
33
1
DOI
出版ステータス出版済み - 2 1 2016
外部発表はい

All Science Journal Classification (ASJC) codes

  • 動物科学および動物学

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