Lek Site Selection by Male Mediterranean Fruit Flies
Lek Site Selection by Male Mediterranean Fruit Flies
复制标题
雄性地中海果蝇的 Lek 选址
作者：
R. Kaspi;B. Yuval
地中海果蝇的交配系统是以勒克斯为基础的。在野外笼子选择实验中，我们检查了果树和同种苍蝇的存在对LEK地点选择的影响。雄性被允许在含有果实的人造树和不含果实的树之间进行选择。雄性表现出对以水果为诱饵的树的显著偏好。为了确定哪些与水果相关的刺激是重要的，男性被允许在视觉和/或嗅觉水果来源的刺激中进行选择。雄性更喜欢在同时产生两种刺激的树上觅食。为了确定同种果蝇对Lek地点选择的影响，允许雄性果蝇在含有雄性和/或雌性同种果蝇的树之间进行选择。有信息素释放的雄性更受欢迎。此外，在田间和人工林木上，我们考察了叶片大小对LEK地点选择的影响。在野外，雄性更喜欢在特定大小的叶子上觅食。此外，叶片的完整性很重要，因为雄性倾向于选择未受损的叶片作为沥青点。在野外笼子实验中，雄性一直选择在含有最大叶子的树上觅食。我们的结论是，Lek地点的选择受到果实和其他Lek雄性的存在的影响，而叶的大小和完整性决定了Lek中的雄性位置。
The mating system of the Mediterranean fruit fly, Ceratitis capitata (Wiedemann), is based on leks. In field cage choice experiments we examined lek site selection as influenced by the presence of fruit and the presence of conspecific flies. Males were allowed to choose between artificial trees containing fruit and trees without fruit. Males showed a significant preference for the tree baited with fruit. To determine which fruit-related stimuli were important, males were allowed to choose between visual and/or olfactory fruit-derived stimuli. Males preferred to lek on trees presenting both stimuli. To determine the influence of conspecifics on lek site selection, males were allowed to choose between trees containing male and/or female conspecific flies. The presence of pheromone-emitting males was preferred. In addition, both in the field and on artificial trees, we examined the effect of leaf size on lek site selection. In the field, males preferred to lek on leaves of a particular size. Moreover, leaf integrity was important, as males tended to select undamaged leaves as lek sites. In field cage experiments, males consistently chose to lek on trees containing the largest leaves. We conclude that the choice of lek site is influenced by the presence of fruit and of other lekking males, while leaf size and integrity determine male location within a lek.