Selection of waterbirds by Geoffroy's cat: Effects of prey abundance, size, and distance
Selection of waterbirds by Geoffroy's cat: Effects of prey abundance, size, and distance
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DOI：
10.1016/j.mambio.2006.07.003
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发表时间：
2007-01-01
影响因子：
1.6
通讯作者：
Vassallo, A. I.
中科院分区：
文献类型：
--
作者：
Canepuccia, A. D.;Martinez, M. M.;Vassallo, A. I.
尽管它的分布很广，但由于缺乏知识，最近已经从世界自然保护联盟的最不受关注类别升级为近危类别。在这项研究中，我们研究在3月Chiquita生物圈保护区（37度46'S，57度27 'W;阿根廷）他们的季节性饮食，和他们的喂养偏好有关的水鸟丰度，大小和距离的水鸟猎物攻击前。通过粪便分析评估的饮食由42%的水鸟和40%的小型哺乳动物组成。水鸟在饮食中的相对重要性在一年中发生了变化，这与它们的可用性的季节性波动有关。从秋季到夏季，对水鸟的捕食增加，而对小型哺乳动物的捕食在此期间减少。猎物发生的营养生态位宽度在秋季较高，春季较低。我们发现，丰富的，攻击前的水鸟猎物的距离，和猎物的大小是显着的预测水鸟消费的Geoffroy的猫。这只小猫似乎改变其杀死率的水鸟丰富的变化。过度消费的猎物接近植被和大猎物表明选择性捕食行为的这只猫。（c）2006年德国Gesellschaft毛皮Saugetierkunde。由爱思唯尔有限公司出版。All rights reserved.
In spite of its wide distribution, Geoffroy's cat (Oncifelis geoffroyi) has been recently upgraded from Least Concern IUCN category to Near Threatened because of lack of knowledge. In this study, we examine at the Mar Chiquita Biosphere Reserve (37 degrees 46'S, 57 degrees 27'W; Argentina) their seasonal diet, and their feeding preference in relation to waterbird abundance, size, and distance of waterbird prey before attack. The diet, evaluated by feces analysis, was comprised of 42% waterbirds and 40% small mammals. The relative importance of waterbirds in the diet changed throughout the year associated with seasonal fluctuations in their availability. Predation on waterbirds increased from autumn to summer, while predation on small mammals decreased during this period. Trophic-niche breadth for prey occurrence was higher in autumn and lower in spring. We found that abundance, distance of waterbird prey before attack, and prey size were significant predictors of waterbird consumption by the Geoffroy's cat. This small cat appears to change its kill rate in relation to waterbird abundance changes. The overconsumption of prey close to vegetation and big prey indicates selective predatory behavior by this cat. (c) 2006 Deutsche Gesellschaft fur Saugetierkunde. Published by Elsevier GmbH. All rights reserved.