Bibliothèque Tour du Valat

Se connecter

Mot de passe oublié ?
Pas encore inscrit ?

La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Détail

Ajouter au panier

Ajouter au panier

Lien vers la notice

Titre :	Sperm length variation in House Wrens Troglodytes aedon
Auteurs :	Emily R. A. Cramer, Auteur ; Terje Laskemoen, Auteur ; Oddmund Kleven, Auteur ; Jan T. Lifjeld, Auteur
Type de document :	Article
Dans :	Journal of Ornithology (154(1) JAN 2013)
Article en page(s) :	129-138
Langues:	Anglais
Résumé :	It is well documented that sperm size and structure varies considerably among avian species, but we know much less about the extent of intraspecific variation in sperm morphometry and its possible co-variation with somatic traits like body size and condition. Here, we investigate patterns of sperm length variation and co-variation in a population of House Wrens (Troglodytes aedon). Total sperm length showed considerable between-male variation, with high repeatability between seasons indicative of a strong genetic basis for this trait. However, we also detected a seasonal increase in the flagellum:head length ratio, which might indicate phenotypic plasticity or adjustment in the relative size of sperm components. The variation in total sperm length within an ejaculate sample was higher for males sampled very early in the season, which may reflect more heterogeneity in the size of seminiferous tubules when testes are growing. None of the studied sperm morphometry traits correlated significantly with any measures of male body size or physiological condition. Further studies are needed to reveal if the observed individual variation in sperm morphology plays any functional or adaptive role.

FAQ

Infos pratiques

Heures d'ouverture et contact

Lundi , mardi et jeudi de 9h à 12h et de 13h à 17h00 : ouverture au public ...

Liens utiles

A-
A
A+