Lek size and female visitation in two species of tephritid fruit flies
Lek size and female visitation in two species of tephritid fruit flies
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两种实蝇的 Lek 大小和雌性访问
DOI：
10.1006/anbe.2000.1723
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发表时间：
2001
期刊：
影响因子：
2.5
通讯作者：
T. Shelly
中科院分区：
文献类型：
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作者：
T. Shelly
摘要与独居的雄性相比，雌性更喜欢探望群居的雄性并与之交配，这一概念是关于Lek行为进化的一个非常先进的假说。这一假设的一个推论是，雄性的人均交配成功率随着Lek大小的增加而增加。很少有现场研究通过实验操作Lek大小来验证这一预测。在这里，我描述了一项实地研究，这些研究监测了两种苔藓类果蝇对人工制造的不同大小的鞭毛的访问情况，这两种果蝇是地中海果蝇，头状角果蝇和东方果蝇，它们是桔小实蝇。没有检测到支持雌性偏爱假说的白背飞虱。然而，在白头蟹中，雌性目击事件的平均比率：含有18或36只雄性的Lek比只包含6只雄性的Lek的信号雄性显著更多。观察到，在自然种群中，头状锦鸡雄通常会形成小的勒克，这表明在最佳勒克大小方面存在着雌雄冲突。
Abstract The notion that females prefer to visit and mate with grouped over solitary males is an oft-advanced hypothesis for the evolution of lek behaviour. A corollary of this hypothesis is that per capita mating success of males increases with increasing lek size. Few field studies have tested this prediction via experimental manipulation of lek size. Here, I describe field studies that monitored female visits to artificially created leks of varying size in two species of tephritid fruit flies, the Mediterranean fruit fly, Ceratitis capitata, and the Oriental fruit fly, Bactrocera dorsalis. No support for the female preference hypothesis was detected for B. dorsalis. However, in C. capitata, mean ratios of female sightings:signalling males were significantly greater for leks containing 18 or 36 males than leks that contained only six males. The observation that C. capitata males in natural populations typically form small leks suggests that a female–male conflict exists regarding optimal lek size.