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Low temperature has opposite effects on sex determination in a marine fish at the larval/postlarval and juvenile stages.


ABSTRACT: Temperature-dependent sex determination (TSD) can be observed in multiple reptile and fish species. It is adaptive when varying environmental conditions advantage either males or females. A good knowledge of the thermosensitive period is key to understand how environmental changes may lead to changes in population sex ratio. Here, by manipulating temperature during development, we confirm that cold temperature (16°C) increases the proportion of fish that develop as females in European sea bass (Dicentrarchus labrax) until 56 days posthatching, but show that it has an opposite effect at later stages, with the proportion of males reaching ~90% after 230 days at 16°C. This is the first observation of opposite effects of temperature at different time periods on the sex ratio of a vertebrate. Our results highlight the potential complexity of environmental effects on sex determination.

SUBMITTER: Vandeputte M 

PROVIDER: S-EPMC7771145 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature

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Low temperature has opposite effects on sex determination in a marine fish at the larval/postlarval and juvenile stages.

Vandeputte Marc M   Clota Frédéric F   Sadoul Bastien B   Blanc Marie-Odile MO   Blondeau-Bidet Eva E   Bégout Marie-Laure ML   Cousin Xavier X   Geffroy Benjamin B  

Ecology and evolution 20201104 24


Temperature-dependent sex determination (TSD) can be observed in multiple reptile and fish species. It is adaptive when varying environmental conditions advantage either males or females. A good knowledge of the thermosensitive period is key to understand how environmental changes may lead to changes in population sex ratio. Here, by manipulating temperature during development, we confirm that cold temperature (16°C) increases the proportion of fish that develop as females in European sea bass (  ...[more]

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2024-12-30 | GSE271230 | GEO