Differential use of bank burrows and lodges by muskrats, Ondatra zibethicus, in a northern marsh environment

Author:

Messier François,Virgl John A.

Abstract

We studied the differential use of lodges and burrows by muskrats in a large (293 ha) northern marsh, during a period characterized by a 100-fold variation in apparent density. Population size (as indexed by dwelling numbers), summer heat stress, rate of collapse of lodges, and over-winter occupancy of lodges and burrows were investigated as potential determinants of dwelling selection. Muskrats selected against lodges at low population size, even when water level was experimentally controlled within a normal range. Sun-exposed lodges in summer were not subject to extreme internal temperatures capable of impairing the survival of young muskrats confined to nests. Lodges were dynamic structures that required substantial and continual upgrade during the ice-free season. Lodges also had a lower probability of remaining active through the winter compared with burrows, possibly because of the freezing of surroundings. We suggest that higher maintenance cost and greater vulnerability to predators likely constitute two critical determinants for muskrat selection against lodges at low population size.

Publisher

Canadian Science Publishing

Subject

Animal Science and Zoology,Ecology, Evolution, Behavior and Systematics

Cited by 21 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3