Do GPS Clusters Really Work? Carnivore Diet From Scat Analysis and GPS Telemetry Methods
Do GPS Clusters Really Work? Carnivore Diet From Scat Analysis and GPS Telemetry Methods
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DOI：
10.1002/wsb.85
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发表时间：
2011-12-01
影响因子：
1.5
通讯作者：
Boyce, Mark S.
中科院分区：
文献类型：
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作者：
Bacon, Michelle M.;Becic, Greg M.;Boyce, Mark S.
利用无线电项圈收集的全球定位系统（GPS）数据使研究人员能够确定捕食者杀死猎物的地点，但这种方法尚未与粪便分析相比较，粪便分析是一种更传统的确定饮食组成的方法。在加拿大阿尔伯塔省东南部和萨斯喀彻温省西南部的柏树山上，我们利用GPS无线电遥测数据对美洲狮（美洲狮）的266个杀戮地点进行了分析，并将211个粪便样本与猎物的组成进行了比较。投杀现场结果显示，猎物物项出现率差异显著；粪便样本能够更好地检测小型哺乳动物。然而，大型猎物占美洲狮食物生物量的90%，当限制对有蹄类猎物的比较时，两种方法估计的生物量几乎相同。正如预期的那样，GPS遥测技术对小型猎物有偏见，但该方法提供的结果与构成大部分生物质消耗的大型猎物的粪便分析相当。(C) 2011野生动物协会。
Global Positioning System (GPS) data collected using radiocollars have allowed researchers to identify sites where predators have killed prey, but this method has yet to be compared with scat analysis, a more traditional method of determining diet composition. We analyzed 211 scat samples and compared composition of prey items with 266 kill sites found using GPS radiotelemetry data on cougars (Puma concolor) in the Cypress Hills of southeast Alberta and southwest Saskatchewan, Canada. Scat and kill site results showed significantly different occurrences of prey items; scat samples were better able to detect small mammals. However, larger prey made up >90% of the biomass of cougar diets, and when restricting the comparison to ungulate prey, both methods estimated nearly identical biomass consumed. As expected, GPS telemetry is biased against small prey but the method provides results comparable to scat analysis for larger prey that make up the majority of biomass consumed. (C) 2011 The Wildlife Society.