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详细书目
| 文件类型: | 文章 |
|---|---|
| 所有的著者/提供者: | Milan Novak |
| ISSN: | 0022-541X |
| OCLC号码: | 479959155 |
| 语言注释: | English |
| 奖励: |
摘要:
A formula for determining the number of beavers (Castor canadensis), by age groups, in an average family is discussed. The formula is based on the assumptions that a colony has a dominant breeding pair, 1.5 years or older, as its basic unit and that the observed age distribution is a true representation of the actual population. Records on number of colonies trapped are not required.
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添加标签 目的是为 "Determining the Average Size and Composition of Beaver Families".
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