Yuval B, Bouskila A
Department of Entomology, University of California at Davis, 95616, Davis, CA, USA.
Center for Population Biology, University of California at Davis, 95616, Davis, CA, USA.
Oecologia. 1993 Mar;95(1):65-69. doi: 10.1007/BF00649508.
We determined the numbers of copulations and predatory attacks in swarms ofAnopheles freeborni (Diptera: Culicidae), and the distribution of these events throughout the duration of the swarming period each day. On 19 evenings of observation, we recorded 2724 copulating pairs leaving swarms and 1351 dragonfly (Pantala hymenaea andErythemis collocata) attacks. Mating activity partially coincided with predator activity. Most copulations occurred between 10 and 20 min after the swarms formed, while predation events were most frequent during the initial 15 min of the swarm. We calculated the ratio of copulations to predatory attacks during the swarming period. This ratio was significantly higher in an area sheltered by trees than it was in the open. We suggest that physiological and ecological constraints other than predation operate on the mating system of this anopheline to affect the timing of swarm initiation and swarm site selection.
我们确定了弗里伯恩按蚊（双翅目：蚊科）群体中的交配次数和捕食攻击次数，以及这些事件在每天群体活动期间的分布情况。在19个晚上的观察中，我们记录到2724对交配的蚊子离开群体，以及1351次蜻蜓（黄蜻和红蜻）攻击。交配活动与捕食者活动部分重合。大多数交配发生在群体形成后的10至20分钟之间，而捕食事件在群体活动的最初15分钟内最为频繁。我们计算了群体活动期间交配与捕食攻击的比例。在有树木遮蔽的区域，这个比例显著高于开阔区域。我们认为，除了捕食之外，生理和生态限制因素也作用于这种按蚊的交配系统，从而影响群体开始的时间和群体地点的选择。
