Sexual size dimorphism in the Common Crane, a monogamous, plumage-monomorphic bird (original) (raw)

Por favor, use este identificador para citar o enlazar a este item:http://hdl.handle.net/10261/196174

Título:
Autor:	; Bautista-Sopelana, Luis M. CSIC ORCID ; Alonso, Javier A.
Financiadores:	Dirección General de Investigación Científica y Técnica, DGICT (España)
Palabras clave:	BiometryGrus grusMorphologySexual selectionSexual size dimorphism
Fecha de publicación:	2019
Editor:	Finnish Ornithological Society
Citación:	Ornis Fennica
Resumen:	Male-biased sexual size dimorphism (SSD) is common and related to male mating success in polygynous birds, but also occurs in monogamous species, in which sexual selection can be strong. In these species, SSD in morphological traits not directly related to reproductive function, such as locomotory or feeding structures, has remained difficult to explain. We present the first biometric data of an archetypal monogamous bird, the Common Crane (Grus grus), based on molecular sexing techniques. Males were heavier and larger than females, with weight showing the largest SSD, followed by wing, central toe, and head length in adults and juveniles. These sexual differences were also present in nine crane pairs where both adults were measured, with values being positively correlated between pair members, suggesting assortative mating and female choice as the main mechanisms driving the evolution of SSD. Since central toes and bills are used as weapons during male-male combats, intra-male competition could also be involved as a sexual selection mechanism. Our results suggest that these small but significant sexual differences in certain morphological traits have probably evolved mainly through sexual selection in this monogamous, plumage-monomorphic species.
Descripción:	Alonso JC, Bautista LM, Alonso JA. 2019. Sexual size dimorphism in the Common Crane, a monogamous, plumage-monomorphic bird. Ornis Fennica 96(4):194-204.
URI:	http://hdl.handle.net/10261/196174
ISSN:	00305685
Aparece en las colecciones:	(MNCN) Artículos

Ficheros en este ítem:

Mostrar el registro completo