Seasonal and spatial shifts in feral cat predation on native seabirds vs. non-native rats on Mikura Island, Japan
Seasonal and spatial shifts in feral cat predation on native seabirds vs. non-native rats on Mikura Island, Japan
复制标题
日本三仓岛上野猫捕食本地海鸟与非本地老鼠的季节性和空间变化
DOI：
10.1007/s13364-020-00544-5
复制
发表时间：
2020
期刊：
影响因子：
1.5
通讯作者：
T. Miyashita
中科院分区：
文献类型：
--
作者：
Sarara Azumi;Y. Watari;N. Oka;T. Miyashita
了解入侵性捕食者如何影响本地物种是至关重要的发展有效的控制策略，特别是在岛屿环境中，替代非本地猎物物种存在。我们研究了野猫Felis silvestris catus食物的季节性和空间性变化，重点是捕食本地条纹剪切水，Calonectris leucomelas，和引进的大鼠，Rattus rattusandR。norvegicus，这是另一种猎物的剪水，在三仓岛，日本。从春季到秋季，条纹海鸥在岛上的低海拔地区繁殖，而老鼠全年都居住在岛上，这使得它们成为当地海鸥缺席时的替代猎物。粪便分析显示，野猫戏剧性地将它们的饮食从冬季引进的老鼠转移到岛上低海拔地区海鸟季节的条纹剪水，而猫则在岛上高海拔地区全年捕食老鼠。这一发现表明，野猫选择性地捕食剪水。这可能是因为它们的体型大，行为不那么谨慎，也因为引进的老鼠在没有剪水的情况下维持了猫的数量。据估计，每只猫每年杀死的条纹剪水的数量为313只，这表明野猫对条纹剪水的影响是自上而下的。需要进一步研究的人口参数和种间的相互作用的三个物种，使有效的猫管理，保护条纹剪切在这个岛上。
Understanding how invasive predators impact native species is essential for the development of effective control strategies, especially in insular environments where alternative non-native prey species exist. We examined seasonal and spatial shifts in diet of feral catFelis silvestris catusfocusing on the predation on native streaked shearwaters,Calonectris leucomelas, and introduced rats,Rattus rattusandR. norvegicus, which are alternative prey to shearwaters, on Mikura Island, Japan. Streaked shearwaters breed at low elevations on the island from spring to autumn, whereas rats inhabit the island throughout the year, which makes them an alternative prey when native shearwaters are absent. Fecal analysis revealed that feral cats dramatically shifted their diets from introduced rats in winter to streaked shearwaters in seabird-season in low elevation areas of the island, while cats preyed on rats throughout the year at high altitudes on the island. This finding suggests that feral cats selectively prey on shearwaters. This is probably because of their large body size and less cautious behavior, and because introduced rats sustain the cat population when shearwaters are absent. The number of streaked shearwaters killed was estimated to be 313 individuals per cat per year, which represents an indication of top-down effects of feral cats on streaked shearwaters. Further studies on the demographic parameters and interspecific interactions of the three species are required to enable effective cat management for the conservation of streaked shearwaters on this island.
Mikura I 饲养雏鸟的条纹海鸥 (Calonectris leucomelas) 的觅食行为和饮食
影响因子：
0.6
作者：
K. Matsumoto;N. Oka;D. Ochi;F. Muto;T. P. Satoh;and Y. Watanuki
通讯作者：
and Y. Watanuki