Identifying predators of ground nests of birds in Kuankuoshui Nature Reserve,Guizhou,southwestern China
Identifying predators of ground nests of birds in Kuankuoshui Nature Reserve,Guizhou,southwestern China
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作者：
Wang Jia-ji
巢捕食是巢失败的主要原因，导致大多数鸟类的繁殖成功率很低或为零。2012年5 - 7月，利用红外相机对贵州宽阔水自然保护区鸟类地面巢的捕食者进行了识别。在15个天然地面巢中，共记录到7次捕食事件，其中2次（28。6%）;白鼬1只（14.红嘴蓝鹊（Urocissa erythrorhyncha）、喜鹊（Pica pica）、果子狸（Paguma larvata）、爱德华鼠（Rattus edwardsi）和王鼠蛇（Elaphe carinata）的种群密度分别为3.3%和3.3%。22个人工地面巢共记录到17次捕食事件，其中11次（64。7%）早于灵猫，5（29。4%）由爱德华的老鼠和1（5。红嘴蓝鹊（Red-billed Blue Magpie）哺乳动物负责83。3%，是鸟类地面巢的主要捕食者。捕食时间因捕食者类型不同而异。e.哺乳动物的捕食主要发生在夜间，而鸟类和蛇的捕食事件都是白天发生的。
Nest predation is the primary cause of nest failure and leads to low or zero breeding success for most birds. From May to July,2012,infrared cameras were used to identify predators of ground nests of birds in Kuankuoshui Nature Reserve,Guizhou,southwestern China. A total of 7 predation events were recorded for 15 natural ground nests,including 2( 28. 6%) by Siberian Weasel( Mustela sibirica),1( 14. 3%) by Red-billed Blue Magpie( Urocissa erythrorhyncha),Magpie( Pica pica),Civet Cat( Paguma larvata),Edward's Rat( Rattus edwardsi) and King Rat Snake( Elaphe carinata),respectively. Totally,17 predation events were recorded for 22 artificial ground nests,including 11( 64. 7%) predated by Civet Cat,5( 29. 4%) by Edward's Rat and 1( 5. 9%) by Red-billed Blue Magpie. Mammals were responsible for 83. 3% of total predation events,and thought to be the main predators of ground nests of birds. Time of predation varied with different types of predators,i. e. mammal predation occurred mainly at night,while both predation events by birds and snakes were exclusively diurnal.