A SHIFT IN FEMALE SOCIAL-ORGANIZATION INDEPENDENT OF RELATEDNESS - AN EXPERIMENTAL-STUDY ON THE FIELD VOLE

被引：28

作者：

AGRELL, J

机构：

[1] Department of Animal Ecology, Lund University, S-223 62 Lund, Ecology Building

来源：

BEHAVIORAL ECOLOGY | 1995年 / 6卷 / 02期

关键词：

INFANTICIDE; MICROTINE RODENTS; MICROTUS-AGRESTIS FEMALES; RELATEDNESS; RADIO TRACKING; SOCIAL ORGANIZATION; SPACING BEHAVIOR;

D O I：

10.1093/beheco/6.2.182

中图分类号：

B84 [心理学]; C [社会科学总论]; Q98 [人类学];

学科分类号：

03 ; 0303 ; 030303 ; 04 ; 0402 ;

摘要：

Home range size, overlap between home ranges, movement patterns and social behavior in two generations of female field voles were examined by radio tracking unrelated individuals in enclosed areas. In addition, potential effects of increased relatedness were examined by comparing setups with groups of sisters and unrelated females. Overwintered females showed less overlap between ranges and moved shorter and more irregular distances compared with females of the year. Based on responses to introduced, unfamiliar conspecifics it was concluded that the overdispersed distribution of overwintered females was maintained primarily by avoidance behavior and that infanticidal behavior was equally frequent in the two generations. Observed differences between generations could not be ascribed to differences in relatedness, and experimental increase of the degree of relatedness had negligible effects. The overdispersion and restricted movements shown by overwintered females are instead suggested to be caused by a combination of low food availability and exposure to intense predation in spring/early summer, whereas spacing and movement patterns of females of the year are less influenced by these factors. As aggressive interactions are rare and population density is usually low in spring, it is unlikely that breeding density and population growth is restrained by the social behavior of overwintered females.

引用

页码：182 / 191

页数：10

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