Rodent Societies: An Ecological & Evolutionary Perspective

intraspecific variation in these behaviors, within some of the well-characterized species. Summary The purpose of this chapter w ...

males. There was a trend for monogamous males to have smaller relative litter weights and species distribution areas compared wi ...

T he distribution offitness-limiting resources is often suggested to be of great importance in the evolution of social and matin ...

species (Steele and Koprowski 2001) relative to sociality of the ground-dwelling squirrels (Armitage 1981). A contin- uum of spa ...

13.7 m height for sequestered copulations inS. niger,55.4% Female in estrus of the 11.2 m mean height for sequestered copulation ...

competition where different male traits may be favored than in a contest competition. Group nesting occurs in many species (Kopr ...

Males access the female using intense aggression directed at other males and occasionally the female (Bakken 1959; Thompson 1977 ...

ulation of proteins in semen (Mossman et al. 1955; Mann and Lutwak-Mann 1981; Koprowski 1992). Voss (1979) suggested five potent ...

Most males lose significant weight during the breeding sea- son, wounding is common, and mortality related to wound- ing and wei ...

Wauters et al. 1990; Koprowski 1993a, 1993b) and may actively avoid pursuing males, to mate in some locations near the ground (K ...

and Koprowski 2001) suggesting that attack rates on copu- lating pairs might be high within nests. Predation risk is sat- isfact ...

proximate tactics adopted by squirrels to maximize repro- ductive success through duration of copulations. Summary Reproductive ...

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Life Histories & Behavior ...

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T he characteristics ofa species’ life cycle, or life history, are typical patterns of growth, reproduc- tion, and survival. Suc ...

ian species of small and large body sizes occur. Within the mammals, rodents are a suitable group of species for an ex- aminatio ...

represent offspring that are closer to adult body size at birth and at the end of the major period of maternal investment, and t ...

the third PC axis. For both of the previous PCAs, however, only the first principal component explained substantial variation in ...

When effects of body mass and phylogeny were statis- tically controlled, scores on the first PC axis were not sig- nificantly as ...