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首页> 美国卫生研究院文献>other >Identification of Prey Captures in Australian Fur Seals (Arctocephalus pusillus doriferus) Using Head-Mounted Accelerometers: Field Validation with Animal-Borne Video Cameras
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Identification of Prey Captures in Australian Fur Seals (Arctocephalus pusillus doriferus) Using Head-Mounted Accelerometers: Field Validation with Animal-Borne Video Cameras

机译：使用头戴式加速度计识别澳大利亚海狗（Arctocephalus pusillus doriferus）中的猎物捕获：使用动物型视频摄像机进行现场验证

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摘要

This study investigated prey captures in free-ranging adult female Australian fur seals (Arctocephalus pusillus doriferus) using head-mounted 3-axis accelerometers and animal-borne video cameras. Acceleration data was used to identify individual attempted prey captures (APC), and video data were used to independently verify APC and prey types. Results demonstrated that head-mounted accelerometers could detect individual APC but were unable to distinguish among prey types (fish, cephalopod, stingray) or between successful captures and unsuccessful capture attempts. Mean detection rate (true positive rate) on individual animals in the testing subset ranged from 67-100%, and mean detection on the testing subset averaged across 4 animals ranged from 82-97%. Mean False positive (FP) rate ranged from 15-67% individually in the testing subset, and 26-59% averaged across 4 animals. Surge and sway had significantly greater detection rates, but also conversely greater FP rates compared to heave. Video data also indicated that some head movements recorded by the accelerometers were unrelated to APC and that a peak in acceleration variance did not always equate to an individual prey item. The results of the present study indicate that head-mounted accelerometers provide a complementary tool for investigating foraging behaviour in pinnipeds, but that detection and FP correction factors need to be applied for reliable field application.
机译：这项研究使用头戴式3轴加速度计和动物摄像机，调查了自由放养的成年雌性澳大利亚海狗（Arctocephalus pusillus doriferus）中的猎物捕获情况。加速度数据用于识别单个企图捕获的猎物（APC），视频数据用于独立验证APC和猎物的类型。结果表明，头戴式加速度计可以检测单个的APC，但无法区分猎物类型（鱼，头足类动物，黄貂鱼）还是成功捕获与未成功捕获之间的区别。测试子集中个体动物的平均检出率（真阳性率）为67-100％，4个动物的平均检测子平均检出率为82-97％。在测试子集中，平均假阳性（FP）率范围为15-67％，在4只动物中平均为26-59％。与起伏相比，波动和摇摆具有更高的检测率，但相反地FP率也更高。视频数据还表明，由加速度计记录的某些头部运动与APC无关，并且加速度变化的峰值并不总是等同于单个猎物。本研究的结果表明，头戴式加速度计提供了一种辅助工具，可用于研究针扎式中的觅食行为，但是检测和FP校正因子需要用于可靠的现场应用。

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