Villerette Nicolas, Helder Rémi, Angibault Jean-Marc, Cargnelutti Bruno, Gerard Jean-François
Centre de recherche et de formation en éco-éthologie, 2C2A, 08240 Boult-aux-Bois, France.
C R Biol. 2006 Jul;329(7):551-8. doi: 10.1016/j.crvi.2006.03.023. Epub 2006 May 2.
In gregarious ruminants, females and males tend to live in separate groups outside the rutting season. According to the 'activity budget' hypothesis, this is due to an activity asynchrony between the two sexes reducing the lifetime of mixed-sex groups. We tested this hypothesis in a fallow deer population. Activity asynchrony was more frequent in mixed-sex than in single-sex groups. In addition, mixed-sex groups had a higher probability of splitting-up than all-female groups, and they mainly split up into single-sex groups. However, activity asynchrony did not appear as a major cause of splitting-up.
在群居反刍动物中，雌性和雄性在发情季节之外往往分群生活。根据“活动预算”假说，这是由于两性之间的活动不同步缩短了混合性别群体的存续时间。我们在一个黇鹿种群中对这一假说进行了验证。混合性别群体中的活动不同步比单性别群体更为频繁。此外，混合性别群体比全雌群体更有可能分裂，并且它们主要分裂为单性别群体。然而，活动不同步似乎并不是分裂的主要原因。
