Discrete sexual size dimorphism in domestic sheep
Rensch's rule describes the pattern of sexual size dimorphism, claiming that in taxa where males are the larger sex, they exhibit higher body size ratios. Domesticated animals offer excellent opportunities for testing predictions of functional explanations of Rensch's theory. In this study...
| Autor: | |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2015 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:10459.1/60156 |
| Acceso en línea: | http://hdl.handle.net/10459.1/60156 |
| Access Level: | acceso abierto |
| Palabra clave: | Ovine breeds Domestication Ovis aries |
| Sumario: | Rensch's rule describes the pattern of sexual size dimorphism, claiming that in taxa where males are the larger sex, they exhibit higher body size ratios. Domesticated animals offer excellent opportunities for testing predictions of functional explanations of Rensch's theory. In this study, we tested the hypothesis that the morphological size of sheep breeds follows Rensch's rule. We have analysed data in the literature on adult body size (live weight and withers height) of males and females in 74 sheep breeds. The analysis confirms that the pattern of sexual size dimorphism conforms discretely to Rensch's rule among sheep breeds, with all breeds appearing to be dimorphic. We propose that this is due to the fact that rams and ewes have been subjected to different selection regimes, with a higher selective pressure on rams. |
|---|