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

Type Article
Date 2020-12
Language English
Author(s) Vandeputte Marc1, Clota Frederic1, Sadoul Bastien2, Blanc Marie-Odile2, Blondeau-Bidet Eva3, Bégout Marie-Laure2, Cousin Xavier1, Geffroy Benjamin2
Affiliation(s) 1 : Université Paris‐Saclay, INRAE, AgroParisTech GABI Jouy‐en‐Josas, France
2 : MARBEC, Univ. Montpellier, CNRS, Ifremer IRD Palavas‐les‐Flots, France
3 : MARBEC, Univ. Montpellier, CNRS, Ifremer IRD Palavas‐les‐Flots, France
Source Ecology And Evolution (2045-7758) (Wiley), 2020-12 , Vol. 10 , N. 24 , P. 13825-13835
DOI 10.1002/ece3.6972
Keyword(s) Dicentrarchus labrax, fish, sex ratio, temperature-dependent sex determination, thermosensitive period, TSD
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.

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How to cite 

Vandeputte Marc, Clota Frederic, Sadoul Bastien, Blanc Marie-Odile, Blondeau-Bidet Eva, Bégout Marie-Laure, Cousin Xavier, Geffroy Benjamin (2020). Low temperature has opposite effects on sex determination in a marine fish at the larval/postlarval and juvenile stages. Ecology And Evolution, 10(24), 13825-13835. Publisher's official version : https://doi.org/10.1002/ece3.6972 , Open Access version : https://archimer.ifremer.fr/doc/00658/76965/