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نویسنده
چکیده
La compétition reproductive entre les femelles de marmottes à ventre jaune implique trois mécanismes majeurs : (1) conflits entre femelles de différentes matrilignées ; (2) agressivité dirigée vers les femelles antenaises ; (3) inhibition de la reproduction des jeunes adultes d'une matrilignée par les adultes plus âgés. Cette dernière retarde surtout l'âge de première reproduction. Bien que la probabilité de se reproduire pour une jeune femelle en présence de sa mère soit faible, elle est meilleure si sa mère est la femelle la plus âgée plutôt que s’il s’agit d’autres femelles plus âgées est présente. En l'absence d'adultes âgés, plus de femelles produisent une portée si des parents du même âge ou plus jeunes sont présents que lorsqu'ils sont absents. La première reproduction d'une jeune femelle n'est pas densité-dépendante. Mots clés : marmotte à ventre jaune, Marmota flaviventris, inhibition reproductrice, âge de la première reproduction, parents, frères et sœurs.
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تاریخ انتشار 2003