文章基本信息

标题：Modeling growth of mandibles in the Western Arctic caribou herd
其他标题：Modeling growth of mandibles in the Western Arctic caribou herd
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作者：Jay M. Ver Hoef ; Patrick Valkenburg ; James R. Dau 等
期刊名称：Rangifer
印刷版ISSN：1890-6729
出版年度：2001
卷号：21
期号：1
页码：29-34
DOI：10.7557/2.21.1.1525
语种：English
出版社：Swedish University of Agricultural Sciences
摘要：We compared growth curves for ramus length and diastema length from two autumn collections of mandibles of male Western Arctic Herd caribou in Alaska. We were primarily interested in determining if growth curves of caribou mandibles differed between caribou born during 1959-1967, after the herd had been high for several years and was probably declining in size, and those born during 1976-1988, when the herd was increasing in size. To compare these growth curves, we used a nonlinear model and used maximum likelihood estimates and likelihood ratio tests. We found that growth rates were similar between periods, but intercepts and variances of growth curves differed. From this we infer that calves were smaller in autumn during the 1960s and that significant compensatory growth did not occur later in life.
关键词：Anatomy; Modeling; Caribou; Western Arctic Caribou Herd;caribou; Western Arctic caribou herd; body size; compensatory growth; diastema; jaws; monomolecular models; ramus; Rangifer tarandus