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Dimorfismo sexual y radiación adaptativa en las lagartijas Anolis
Marguerite A Butler1, Stanley A Sawyer, Jonathan B Losos
1Department of Zoology, University of Hawaii at Manoa, 2538 McCarthy Mall, Edmonson 152, Honolulu, Hawaii 96822, USA. mbutler@hawaii.edu
Nature
|May 15, 2007
Resumen
El dimorfismo sexual contribuye significativamente a la diversidad de la radiación adaptativa en los lagartos Anolis. Ignorar el sexo en los estudios puede subestimar la radiación evolutiva, lo que afecta nuestra comprensión de la diversificación.
Área de la Ciencia:
- Biología evolutiva Biología evolutiva.
- Ecología Ecología Ecología.
- Zoología Zoología Zoología.
Sus antecedentes:
- El dimorfismo sexual es común en los animales, pero a menudo se pasa por alto en los estudios de radiación adaptativa.
- La mayoría de las investigaciones de radiación adaptativa ignoran el sexo o se centran en un solo sexo.
Objetivo del estudio:
- Para investigar la contribución del dimorfismo sexual a la diversidad ecomorfológica en las radiaciones adaptativas del lagarto Anolis de las Indias Occidentales.
- Determinar si el dimorfismo sexual es una vía alternativa para la diversificación ecológica.
Principales métodos:
- Análisis comparativo de la variación morfológica dentro y entre las especies de lagarto Anolis.
- Evaluación del dimorfismo sexual en relación con los tipos ecológicos.
Principales resultados:
- Los machos y las hembras dentro de las especies Anolis ocupan espacios morfológicos distintos.
- La variación sexual es sustancial en relación con la variación interespecífica.
- La extensión del dimorfismo sexual varía según el tipo ecológico.
Conclusiones:
- El dimorfismo sexual es un importante impulsor de la diversidad ecomorfológica en las radiaciones adaptativas de Anolis.
- Excluir el dimorfismo sexual puede llevar a subestimar la radiación evolutiva adaptativa.
- El dimorfismo sexual y la divergencia interespecífica pueden representar rutas alternativas para la diversificación ecológica.
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