Environmental sex reversal, Trojan sex genes, and sex ratio adjustment: conditions and population consequences.

Détails

ID Serval
serval:BIB_9ECF7BCB8864
Type
Article: article d'un périodique ou d'un magazine.
Sous-type
Synthèse (review): revue aussi complète que possible des connaissances sur un sujet, rédigée à partir de l'analyse exhaustive des travaux publiés.
Collection
Publications
Titre
Environmental sex reversal, Trojan sex genes, and sex ratio adjustment: conditions and population consequences.
Périodique
Molecular ecology
Auteur(s)
Stelkens R. B., Wedekind C.
ISSN
1365-294X[electronic]
Statut éditorial
Publié
Date de publication
2010
Peer-reviewed
Oui
Volume
19
Numéro
4
Pages
627-646
Langue
anglais
Résumé
Abstract The great diversity of sex determination mechanisms in animals and plants ranges from genetic sex determination (GSD, e.g. mammals, birds, and most dioecious plants) to environmental sex determination (ESD, e.g. many reptiles) and includes a mixture of both, for example when an individual's genetically determined sex is environmentally reversed during ontogeny (ESR, environmental sex reversal, e.g. many fish and amphibia). ESD and ESR can lead to widely varying and unstable population sex ratios. Populations exposed to conditions such as endocrine-active substances or temperature shifts may decline over time due to skewed sex ratios, a scenario that may become increasingly relevant with greater anthropogenic interference on watercourses. Continuous exposure of populations to factors causing ESR could lead to the extinction of genetic sex factors and may render a population dependent on the environmental factors that induce the sex change. However, ESR also presents opportunities for population management, especially if the Y or W chromosome is not, or not severely, degenerated. This seems to be the case in many amphibians and fish. Population growth or decline in such species can potentially be controlled through the introduction of so-called Trojan sex genes carriers, individuals that possess sex chromosomes or genes opposite from what their phenotype predicts. Here, we review the conditions for ESR, its prevalence in natural populations, the resulting physiological and reproductive consequences, and how these may become instrumental for population management.
Mots-clé
conservation, environmental sex reversal, population management, sex determina-tion, sex ratio, Trojan sex genes
Pubmed
Web of science
Création de la notice
08/12/2009 11:05
Dernière modification de la notice
20/08/2019 15:05
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