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Institute of Global Innovation Research

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Event

【GIR Open Seminar】 Dr. John Godwin

Date 2019.7.3 (17 : 00 - 18:30)
Venue Multipurpose Seminar Room, 1st Fl., Building 2, Fuchu Campus, TUAT
Speaker / Topic Dr. John Godwin (Professor, North Carolina State University, U.S.A.)
"Endocrine mechanisms of sexual plasticity in fishes"

〈Abstract〉
Fishes display an extraordinary diversity of sex determination mechanisms including environmental sex determination with examples of both temperature and social cues being the critical influence determining whether an individual becomes female or male. We explore this variation in field-based studies with two species of fishes, the Caribbean bluehead wrasse that exhibits female-to-male functional sex change under social control and the southern flounder where sex determination is influenced by temperature. The transduction of environmental cues into sex determination responses remains poorly understood despite decades of study, but some basic principles are becoming clear from these studies. Both estrogen production in the gonads and brain and the endocrine stress response appear to play important roles in guiding environmental sex determination and do so through effects on conserved sex determination pathways. The mechanisms for these responses provide a fascinating example of how sex can adapt to environmental conditions and a useful system for studying phenotypic plasticity more generally.
Language English
Intended for Everyone is welcome to attend.
Co-Organized by Institute of Global Innovation “Food” Watanabe Team
Excellent Leader Development for Super Smart Society by New Industry Creation and Diversity
Outline
Contact Institute of Global Innovation Research, Institute of Agriculture,
Prof. Gen Watanabe
Email: gen (at) cc.tuat.ac.jp

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