LONG-RANGE VERSUS SHORT-RANGE FORAGING STRATEGIES OF HOARY (LASIURUS-CINEREUS) AND SILVER-HAIRED (LASIONYCTERIS-NOCTIVAGANS) BATS AND THE CONSEQUENCES FOR PREY SELECTION
LONG-RANGE VERSUS SHORT-RANGE FORAGING STRATEGIES OF HOARY (LASIURUS-CINEREUS) AND SILVER-HAIRED (LASIONYCTERIS-NOCTIVAGANS) BATS AND THE CONSEQUENCES FOR PREY SELECTION
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DOI：
10.1139/z85-371
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发表时间：
1985-01-01
影响因子：
1.4
通讯作者：
BARCLAY, RMR
中科院分区：
文献类型：
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作者：
BARCLAY, RMR
栖息地的使用，时间活动，觅食行为，和猎物选择的灰白蝙蝠（Lasiurus cinereus）和银发蝙蝠（Lasionycteris cautivagans）进行了研究，在三角洲沼泽，马尼托巴[加拿大]。通过使用超声波探测器监测回声定位呼叫来评估蝙蝠的活动。利用粘性和不适陷阱确定猎物的可用性，并从粪便分析中获得饮食信息。这两个物种都活跃了一整夜，主要在一个狭窄的森林山脊的背风处觅食。Lasionycteris lasiontivagans觅食的方式，表明它检测和追求猎物在短距离内。这些蝙蝠飞行缓慢，机动性很强，通常被观察到在小空地上以成群的昆虫为食。它们利用回声定位来支持短距离觅食策略的概念，并伺机捕食任何可用的昆虫。另一方面，灰毛马熊采用远距离猎物探测和追踪觅食策略。它们在开阔地带沿着沿着直线路径快速飞行，并使用回声定位呼叫来探测远处的昆虫。蝙蝠的食物主要是大型昆虫（飞蛾、甲虫和蜻蜓），但它们也会伺机而动。觅食策略可能会限制小昆虫作为猎物的可用性和盈利能力。
Habitat use, temporal activity, foraging behaviour, and prey selection of hoary bats (Lasiurus cinereus) and silver-haired bats (Lasionycteris noctivagans) were studied at Delta Marsh, Manitoba [Canada]. Bat activity was assessed by monitoring echolocation calls with ultrasonic detectors. Prey availability was determined using sticky and Malaise traps and dietary information was obtained from fecal analysis. Both species were active all night and foraged primarily in the lee of a narrow forested ridge. Lasionycteris noctivagans foraged in a manner that indicates that it detects and pursues prey over short distances. These bats fly slowly, are highly manoeuverable, and were commonly observed feeding on swarms of insects in small clearings. They use echolocation calls that support the notion of a short-range foraging strategy and feed opportunistically on whatever insects are available. Lasiurus cinereus, on the other hand, uses a long-range prey detection and pursuit foraging strategy. They fly rapidly along straight line paths in open areas and use echolocation calls designed to detect insects at a distance. The diet consists primarily of large insects (moths, beetles, and dragonflies), but the bats nonetheless feed opportunistically. The foraging strategy likely restricts the availability and profitability of small insects as prey.