Male size and survival: The effects of male combat and bird predation in Dawson's burrowing bees, Amegilla dawsoni
Male size and survival: The effects of male combat and bird predation in Dawson's burrowing bees, Amegilla dawsoni
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DOI：
10.1046/j.1365-2311.1996.00007.x
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发表时间：
1996-11-01
影响因子：
2.2
通讯作者：
Alcock, J
中科院分区：
文献类型：
--
作者：
Alcock, J
1.道森氏穴蜂（Amegilla dawsoni）的雄性分两个等级：大型和小型。主要男性积极竞争新兴的女性在完全暴露的出现领域，而未成年人往往采用另一种交配策略，这涉及到迅速巡逻的植被周边的出现领域。由于大雄鸟在地面上与对手激烈搏斗，它们的翅膀比小雄鸟磨损得更厉害，翅膀受损的风险也更高。此外，雄性巡逻出现的地区和等待出现在地面上的女性更有可能被捕食性鸟类比周边的未成年人。基于标记重捕获数据的寿命测量表明，专业比未成年男性寿命略短。如果雄性之间的战斗和捕食者确实减少了主要雄性相对于矿工的寿命，其影响将是减少主要相对于次要的终身交配优势。因此，死亡率的差异可能是维持这两种雄性的一个因素。
1. Males of Dawson's burrowing bee, Amegilla dawsoni, occur in two size classes, large majors and small minors. Major males compete aggressively for emerging females in completely exposed emergence areas, whereas minors often employ an alternative mating tactic, which involves rapid patrolling in the vegetated periphery of emergence areas.2. Because major males wrestle violently with rivals on the ground, they experience greater wing wear and a higher risk of wing damage than minor males. In addition, males patrolling emergence areas and waiting on the ground for emerging females are more likely to be killed by predatory birds than are peripheral minors.3. Measurements of longevity based on mark-recapture data suggest that majors are slightly shorter-lived than minor males. If male-male combat and predators do reduce the lifespan of major males relative to miners, the effect would be to decrease the lifetime mating advantage of majors relative to minors.4. Differential mortality could therefore be a factor in the maintenance of the two forms of males in this species.