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首页> 外文期刊>Canadian Journal of Zoology >The influence of wing morphology and echolocation on the gleaning ability of the insectivorous bat Myotis tricolor
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The influence of wing morphology and echolocation on the gleaning ability of the insectivorous bat Myotis tricolor

机译：机翼形态和回声位置对三色食虫蝙蝠Myotis吸尘能力的影响

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摘要

On the basis of its external morphology, Myotis tricolor (Temminck, 1832) should be able to both aerial-feed and glean. Furthermore, this bat is known to use broadband calls of short duration, reinforcing the prediction that it gleans. However, results from this study indicate that M. tricolor does not commonly glean. This conclusion was reached after studying the foraging behaviour of M. tricolor in a flight room. We presented M. tricolor with mealworms, moths, mole crickets, beetles, and cicadas ina variety of ways that required either gleaning and (or) aerial feeding. Although M. tricolor readily took tethered prey, it did not take any of the variety of insects presented to it in a manner that required gleaning. We therefore compared its wing morphology and echolocation calls with those of several known gleaners, Nycteris thebaica E. Geoffroy, 1818, Myotis lucifugus (Le Conte, 1831), and Myotis septentrionalis (Trouessart, 1897), and an aerial forager, Neoromicia capensis (A. Smith, 1829). In adiscriminant analysis wing-tip shape was the only variable to provide some degree of discrimination between species, with M. tricolor having more pointed wing tips than the known gleaners. Discriminant analysis of echolocation-call parameters grouped M.tricolor with the other Myotis species and separated it from N. capensis and N. thebaica. However, M. tricolor did not use harmonics as did the other Myotis species. The apparent failure of M. tricolor to glean might therefore be due to its relatively pointed wings and narrow-bandwidth echolocation calls, owing to the absence of harmonics in its calls.
机译：根据其外部形态，Myotis tricolor（Temminck，1832）应该能够进行空中饲喂和采摘。此外，已知该蝙蝠会使用短时间的宽带呼叫，从而增强了对它进行搜集的预测。但是，这项研究的结果表明，三色分枝杆菌通常不会聚集。在研究三色分枝杆菌在飞行室中的觅食行为后，得出了这一结论。我们用各种需要吸尘和（或）高空进食的方式向三色分枝杆菌呈现了粉虫，蛾，mole，甲虫和蝉。尽管三色分枝杆菌很容易就抓住了束缚的猎物，但它并没有采取需要拾起的方式呈现给它的任何种类的昆虫。因此，我们将其翼形和回声定位与几种已知的拾穗者（Nycteris thebaica E. Geoffroy，1818年，Myotis lucifugus（Le Conte，1831年）和Myotis septentrionalis（Trouessart，1897年），以及空中觅食者Neoromicia capensis（史密斯（A. ​​Smith），1829年）。在区分分析中，翼尖形状是唯一可在物种之间提供一定程度区分度的变量，三色分枝杆菌的翼尖比已知的拾穗者多。回声定位调用参数的判别分析将三色分枝杆菌与其他Myotis物种分组，并将其与N. capensis和N. thebaica分离。但是，三色分枝杆菌不像其他Myotis物种那样使用谐波。因此，三色分枝杆菌明显无法收集，可能是由于它的尖角的翅膀和窄带宽的回声定位调用，因为其调用中没有谐波。

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