[Inversion of the female sexual phenotype at high temperature in the urodelian amphibian, Pleurodeles waltii Michah].

Breeding of Pleurodeles waltii larvae with female gentotype was carried out in 29,5-30 degrees C tap water within 4 months after hatching. 11 out of 15, 1 year old animals, exhibited all the characteristics of male sexual maturity. Mating one of the neo-males (ZW) thus obtained, with a standard female (ZW) results in a sex-ratio of the offspring consistent with theoretical expectation.