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Sex determination systems in reptiles are related to ambient temperature but not to the level of climatic fluctuation.
Cornejo-Páramo, Paola; Lira-Noriega, Andrés; Ramírez-Suástegui, Ciro; Méndez-de-la-Cruz, Fausto R; Székely, Tamás; Urrutia, Araxi O; Cortez, Diego.
Afiliação
  • Cornejo-Páramo P; Center for Genomics Sciences, UNAM, CP62210, Cuernavaca, Mexico.
  • Lira-Noriega A; Milner Centre for Evolution, Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
  • Ramírez-Suástegui C; CONACYT Research Fellow, Red de Estudios Moleculares Avanzados, Instituto de Ecología, A.C. Carretera antigua a Coatepec 351, Col. El Haya, Xalapa, Veracruz, Mexico.
  • Méndez-de-la-Cruz FR; Center for Genomics Sciences, UNAM, CP62210, Cuernavaca, Mexico.
  • Székely T; Milner Centre for Evolution, Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
  • Urrutia AO; Biology Institute, UNAM, CP04510, Mexico City, Mexico.
  • Cortez D; Milner Centre for Evolution, Department of Biology and Biochemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
BMC Evol Biol ; 20(1): 103, 2020 08 17.
Article em En | MEDLINE | ID: mdl-32807071
BACKGROUND: Vertebrates exhibit diverse sex determination systems and reptiles stand out by having highly variable sex determinations that include temperature-dependent and genotypic sex determination (TSD and GSD, respectively). Theory predicts that populations living in either highly variable or cold climatic conditions should evolve genotypic sex determination to buffer the populations from extreme sex ratios, yet these fundamental predictions have not been tested across a wide range of taxa. RESULTS: Here, we use phylogenetic analyses of 213 reptile species representing 38 families (TSD = 101 species, GSD = 112 species) and climatic data to compare breeding environments between reptiles with GSD versus TSD. We show that GSD and TSD are confronted with the same level of climatic fluctuation during breeding seasons. However, TSD reptiles are significantly associated with warmer climates. We found a strong selection on the breeding season length that minimises exposure to cold and fluctuating climate. Phylogenetic path analyses comparing competing evolutionary hypotheses support that transitions in sex determination systems influenced the ambient temperature at which the species reproduces and nests. In turn, this interaction affects other variables such as the duration of the breeding season and life-history traits. CONCLUSIONS: Taken together, our results challenge long-standing hypotheses about the association between sex determination and climate variability. We also show that ambient temperature is important during breeding seasons and it helps explain the effects of sex determination systems on the geographic distribution of extant reptile species.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Répteis / Temperatura / Clima / Processos de Determinação Sexual Tipo de estudo: Prognostic_studies Limite: Animals Idioma: En Revista: BMC Evol Biol Assunto da revista: BIOLOGIA Ano de publicação: 2020 Tipo de documento: Article País de afiliação: México País de publicação: Reino Unido
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Répteis / Temperatura / Clima / Processos de Determinação Sexual Tipo de estudo: Prognostic_studies Limite: Animals Idioma: En Revista: BMC Evol Biol Assunto da revista: BIOLOGIA Ano de publicação: 2020 Tipo de documento: Article País de afiliação: México País de publicação: Reino Unido