Comments on the Predator-Prey Relationship of the Texas Kangaroo Rat (Dipodomys elator) and Barn Owl (Tyto alba)
Comments on the Predator-Prey Relationship of the Texas Kangaroo Rat (Dipodomys elator) and Barn Owl (Tyto alba)
复制标题
德克萨斯袋鼠 (Dipodomys elator) 和谷仓猫头鹰 (Tyto alba) 捕食者与被捕食者关系的评论
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
Clyde Jones
中科院分区：
文献类型：
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作者：
F. B. Stangl;M. M. Shipley;J. Goetze;Clyde Jones
摘要谷仓猫头鹰(Tyto Alba)捕食啮齿动物在一定程度上反映了小型哺乳动物捕食物种的可获得性。然而，如果有的话，Sigmodon属(棉鼠)、Oryzomys属(水稻鼠)和Microtus属(田鼠)的小到中等大小的老鼠会被选择性地捕食，而有足类动物(袋鼠)往往是代表性不足的猎物。德克萨斯州北部白纹伊蚊的活动范围与很少被研究的德州袋鼠(D.elator)的活动范围重叠。对反流的谷仓猫头鹰颗粒的检查为这种独特的啮齿动物的捕食提供了第一份文件。然而，鉴于这种袋鼠的现成供应，它作为谷仓猫头鹰的猎物物种的代表性低于预期，即使其他地区的其他袋鼠物种的代表性通常很低。对猎物的选择性捕食和其他缓冲物种的存在肯定是猫头鹰颗粒中袋鼠发病率较低的原因。此外，还可能涉及斑腿类的一些捕食者回避机制(S)，可能在斑腿类中尤其发达。
Abstract Rodent prey of the barn owl (Tyto alba) partly reflects the availability of prey species of small mammals. However, small- to moderate-sized mice of the genera Sigmodon (cotton rats), Oryzomys (rice rats) and Microtus (voles) are selectively preyed upon when available, and species of Dipodomys (kangaroo rats) are often underrepresented prey items. The range of T. alba in north Texas overlaps the restricted range of the little-studied Texas kangaroo rat (D. elator). Examination of regurgitated barn owl pellets provides the first documentation of predation on this distinctive rodent. However, given the ready availability of this kangaroo rat, its representation as a prey species of the barn owl is lower than expected, even given the usually poor representation of other Dipodomys species from other localities. Selective predation on favored prey and presence of other buffer species are certainly contributory factors to the low incidence of kangaroo rats in owl pellets. Some predator avoidance mechanism(s) of Dipodomys, perhaps especially well developed in D. elator, might also be implicated.