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Ecology and Management of the Indiana Bat in Michigan

机译：密歇根州印第安纳蝙蝠的生态与管理

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摘要

The Indiana bat (Myotis sodalis) is one of two mammals on the federal list of endangered species that consistently breed in Michigan. Most Indiana bats from Michigan winter in southern Indiana or Kentucky, but a few hibernate at Tippy Dam in northern Lower Michigan; warm-season records (April-October), in contrast, exist for 12 counties in southern Lower Michigan. Births typically occur in mid-to-late June, and lactation lasts 3-5 weeks. Eighty-nine percent of adult females are reproductive (pregnant, lactating, or postlactating), and 11 % of all adults are male. We discovered 69 roost trees used by females and young in six different counties, and most species of tree are typical of lowlands, such as various ash (Fraxinus, 45%), maple (Acer, 36%), and elm (Ulmus, 12%). As a means of avoiding direct "take," resource managers often allow cutting of potential roost trees while Indiana bats are hibernating; however, we recommend that clusters of high-quality, potential roosts not be removed before verifying whether they are used by the bats.
机译：印第安那蝙蝠（Myotis sodalis）是在密歇根州持续繁殖的联邦濒危物种名单上的两种哺乳动物之一。大多数来自印第安纳州蝙蝠的印第安纳州蝙蝠冬季在印第安纳州南部或肯塔基州，但少数人在下密歇根州北部的Tippy大坝冬眠。相反，下密歇根州南部有12个县存在暖季记录（4月至10月）。出生通常发生在6月中下旬，哺乳期为3-5周。成年女性中有89％处于生殖状态（怀孕，哺乳或哺乳后），而所有成年女性中有11％是男性。我们在六个不同的县发现了69棵雌性和幼年使用的枯树，大多数树种都是低地的典型物种，例如各种灰烬（Fraxinus，45％），枫树（Acer，36％）和榆树（Ulmus，12 ％）。作为避免直接“采食”的一种手段，资源管理员通常允许在印第安纳蝙蝠冬眠时砍伐潜在的栖木。但是，我们建议在验证蝙蝠是否使用过高质量的栖息地之前，不要将它们除去。

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