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吉林珲春自然保护区野生东北虎捕食家畜的状况

刘 宇,张恩迪,李志宏,陈晓婕   

  1. 华东师范大学化学与生命科学学院,上海
  • 出版日期:2006-08-31 发布日期:2008-07-07

Amur tiger (Panthera tigris altaica) predation on livestock in Hunchun Nature Reserve,Jilin,China

LIU Yu, ZHANG Endi,LI Zhihong,CHEN Xiaojie   

  • Online:2006-08-31 Published:2008-07-07

摘要: 2002 年5 月至2004 年10 月通过跟踪调查,我们搜集到野生东北虎捕食珲春自然保护区居民家畜的数据,共计38 起捕食事件,有51 头家畜遭到捕食。这些数据包括:捕食事件发现时间、被捕食家畜的数量、类型、年龄、性别、虎痕迹照片和捕食点的GPS 数据。运用Mann-Whitney U 检验对数据的差异性进行了检验;结合ArcView GIS和MapIn fo 分析,对捕食点的空间属性进行了量化,用多个生态因子对其进行了表征;运用PCA 分析了多因子中的主要成分。这些数据表明:在珲春,东北虎主要捕食牛和马,对猪和羊没有捕食,对牛和马的捕食也不存在偏好。东北虎倾向捕食成年个体,并且,大多数情况下只捕食1~2 个个体。成功的捕食事件中,多为1 头遭捕食;该捕食策略为虎权衡后的选择。捕食家畜事件多发生在3 ~11 月的非冰冻期。影响捕食地的生态变量重要性排序为:距最近居民区距离> 海拔> 距最近道路距离> 土地利用(Ⅱ型)类型> 坡度> 坡向> 距最近水源距离> 植被类型> 道路类型> 土地利用(I 型)类型。距最近居民区距离为:3 666 ± 2 308 m,极显著地近于休息卧迹、警戒卧迹和刨痕。该距离更多地集中在4 000 m以下区域。海拔为280 ± 114 m,极显著地低于休息卧迹,显著低于警戒卧迹和刨痕。由于当地居民区多集中在海拔较低的区域,因此,这种显著的不同可以看成是一个伴生的结果。距最近道路距离为:522 ± 543 m,极显著地近于刨痕,显著近于休息卧迹和警戒卧迹。上述2 个人为干扰因子,对捕食的影响具有相似性。对上述3 个生态因子的详细研究说明,虎并不愿意有意识地如此接近人类聚居区,而是家畜食物的诱惑,令虎冒险前往。在26 个捕食点中,14 个在用材林,6 个在特护林,3 个在农田,2 个在灌木林,1个在居民区。被调查的当地居民共损失了 11 851 kg家畜,合人民币116 126元。

关键词: 虎, 捕食, 家畜, GIS, PCA

Abstract: We examined predation on livestock by the Amur tiger (Panthera tigris altaica) in Hunchun Nature Reserve, Jilin, China, through field surveys and studying claims made by local residents from May 2002 to October 2004. There were 38 claims and a total of 51 livestock were killed in these claims. Date, kills number, type, age and sex, tiger trails and the GPS data of the predation spots. We used Mann-Whitney U to test the significance of difference. GIS analysis was employed to quantify these spots with 10 ecological variables. We use PCA to identify the principle components among the 10 variables. Results show that cattle and horses were the main species of livestock preyed on. Considering the ratio of total numbers, tigers showed no preference for cattle or horses. Tigers preferred prey adult animals, and most tiger predation claims involved single or two victims. Most predation claims occurred during the non-frozen season (March-November). Location of predation, in order of importance of the 10 ecological variables was: distance away from residence > elevation >distance away from road > land use type II > slope > aspect > distance away from river > vegetation type > road type > land use type I. Mean distance from residence was 3 666 ± 2 308 m, which was highly significantly nearer than that of tiger bed, sphinx or scrape. Mean elevation was 280 ± 114 m, which was highly significantly lower than that of tiger beds and significantly lower than that of sphinx and scrape. Mean distance from roads was 522 ± 543 m, which was highly significantly nearer than that of tiger scrape, ignificantly nearer than that of bed and nearly significantly nearer than that of sphinx. Among the 26 predation locations,14 were in less protected forests,6 were in specially protected forest,3 were in farmland,2 were in shrubbery and 1 was near the residence area. In total, tigers preyed on a total of 11 851 kg of livestock, costing at least 116 126.00 RMB loss.

Key words: GIS, Livestock, PCA, Predation, Tiger (Panthera tigris)