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首页> 外文期刊>Canadian Journal of Zoology >The use of exposed diurnal roosts in Alberta by the little brown bat, Myotis lucifugus
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The use of exposed diurnal roosts in Alberta by the little brown bat, Myotis lucifugus

机译：小棕蝙蝠Myotis lucifugus在艾伯塔省使用裸露的昼夜栖息地

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摘要

The use of exposed diurnal roosts by the little brown bat, Myotis lucifugus, throughout the summer months is only known to occur among Alberta populations of this species. This study is the first to examine that behaviour. In total, 426 M. lucifugus using exposed anthropogenic surfaces as diurnal roosts were observed in the summers of 1985 and 1986. Bats were usually found alone, but groups of up to six individuals were seen. When found at these roosts, 98.8% of bats were at least 2 m from the ground and 95.1% were below an overhang. Bats were found on brick substrates in 89.0% of observations and in the corner between two surfaces in 57.0%. Bats were found on east-facing surfaces less frequently than expected under random distribution. Roost selection appears to have been based on several strategies, including thermoregulation, predator avoidance, and desiccation avoidance. After maternity roosts were vacated, the proportion of juveniles at exposed roosts was higher than their proportion in the total population. This may be the result of their inability to enter, or lack; of knowledge of, many enclosed roosts used by adults. [References: 15]
机译：整个夏季，小棕蝙蝠（Myotis lucifugus）使用裸露的昼夜栖息地的情况仅在该物种的艾伯塔省种群中发生。这项研究是第一个检验这种行为的方法。在1985年和1986年夏季，总共观察到426例使用裸露的人为表面的萤火虫（M. lucifugus），其昼夜栖所。通常仅发现蝙蝠，但最多见六只。在这些栖息地发现时，有98.8％的蝙蝠离地面至少2 m，而95.1％的蝙蝠在悬垂线以下。在观察到的砖块基质中有89.0％的蝙蝠，在两个表面之间的角落中发现的蝙蝠为57.0％。在随机分布的情况下，在朝东的表面上发现蝙蝠的频率低于预期。栖息地选择似乎基于多种策略，包括温度调节，避免捕食和避免干燥。腾出产妇栖息地之后，处于裸露栖息地的少年所占比例高于其在总人口中所占的比例。这可能是他们无法进入或缺乏的结果;成年人使用的许多封闭式栖息地的知识[参考：15]

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