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Selección sexual. selección de género. ¿Están los patos impresionados por la exhibición de los drakes?
K G McCracken1, R E Wilson, P J McCracken
1Institute of Arctic Biology and Department of Biology and Wildlife, University of Alaska Fairbanks, Fairbanks, Alaska 99775, USA. fnkgm@uaf.edu
Nature
|September 15, 2001
Resumen
El pato de lago argentino posee el pene de ave más largo, mide casi medio metro y tiene forma de sacacorchos. Los factores evolutivos pueden incluir la selección sexual y la preferencia femenina por penes más largos o decorados.
Área de la Ciencia:
- Biología evolutiva Biología evolutiva.
- Zoología Zoología Zoología.
- Anatomía comparada y anatomía comparada.
Sus antecedentes:
- Pocas especies de aves exhiben el desarrollo del falo.
- El pato de lago argentino (Oxyura vittata) es una excepción notable con un pene altamente desarrollado.
Objetivo del estudio:
- Documentar y describir la extraordinaria morfología del pene del pato de lago argentino.
- Explorar los potenciales impulsores evolutivos detrás del desarrollo de este órgano sexual aviar único.
Principales métodos:
- Análisis morfológico del pene del pato de lago argentino.
- Revisión comparativa de la evolución del pene en especies aviares.
Principales resultados:
- El pene del pato de lago argentino tiene forma de sacacorchos y mide aproximadamente medio metro, lo que representa el pene más grande conocido entre las aves.
- Las presiones evolutivas potenciales incluyen la selección sexual y la elección de la pareja femenina.
Conclusiones:
- La morfología extrema del pene en el pato de lago argentino es probablemente moldeada por una intensa selección sexual.
- Se necesita más investigación para dilucidar completamente la compleja dinámica evolutiva que impulsa la elaboración del pene en esta especie.
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