Phenotypic plasticity in reproductive and somatic efforts of female Columbian ground squirrels

被引:2
|
作者
Dobson, F. Stephen [1 ,2 ]
Saraux, Claire [1 ]
Viblanc, Vincent A. [1 ]
机构
[1] Univ Strasbourg, Inst Pluridisciplinaire Hubert Curien, CNRS, UMR 7178, F-67000 Strasbourg, France
[2] Auburn Univ, Dept Biol Sci, Auburn, AL 36830 USA
基金
美国国家科学基金会;
关键词
Columbian ground squirrel; phenotypic plasticity; repeatability; reproductive effort; somatic effort; Urocitellus columbianus (Ord; 1815); LIFE-HISTORY PATTERNS; ENERGY ALLOCATION; NATURAL-SELECTION; BODY-MASS; POPULATION; COSTS; SIZE; HIBERNATION; EVOLUTION; TACTICS;
D O I
10.1139/cjz-2023-0108
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
Phenotypic plasticity of life-history traits is well known among vertebrate species. We estimated reproductive and somatic ef-forts of female Columbian ground squirrels (Urocitellus columbianus (Ord, 1815)) to test for plasticity of these important resource allocations. We examined a 27-year dataset of life-history traits on these long-living (8-10 years), hibernating, montane-living mammals. Environmental variation was estimated from two important traits of mothers, their relative timing of breeding and spring maternal body mass (initial "capital" for use in subsequent reproduction). Results from 183 known-aged mothers and 508 litters revealed considerable variation in the relative timing of breeding, initial maternal mass, and reproductive and so-matic efforts, as well as significant variation among ages and years. Results from 125 mothers that reproduced more than once (and 450 litters) revealed significant plasticity of reproductive and somatic efforts with respect to relative timing of breeding and spring maternal mass. A within-subject centering statistical approach showed that phenotypically plastic reproductive and somatic efforts were due to variation within individuals, but were not always reflected by the pattern of responses among individuals in the population. The plastic responses of different mothers appeared to be similar in strength.
引用
收藏
页码:228 / 238
页数:11
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