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Title: The effect of intrauterine position on the survival, reproduction and home range size of female house mice (Mus musculus)

Author: Zielinski, W. J.; vom Saal, F. S.; Vandenbergh, J. G.

Date: 1992

Source: Behav. Ecol. Sociobiol 30:185-191

Publication Series: Journal/Magazine Article (JRNL)

Description: In laboratory studies using albino house mice, a female's prior intrauterine position can affect many postnatal physiological, morphological and behavioral characteristics. Females flanked by males in utero (2M females) exhibit more aggressive dominance than females flanked by females (OM females). Thus, wild 2M females may be most successful during peak population densities when their aggressive nature would allow them to displace other females from limited resources. 2M and 0M females and males delivered by cesarean section were individually marked and released as young adults on two occasions onto a "highway island" (the area enclosed by exit and entrance ramps at an interchange) to determine whether 2 M females have a competitive advantage over 0 M females in the field. Males were included to create realistic population structure; their intrauterine position was not a treatment. Feeding stations afforded individuals an opportunity to exhibit their dominance by maintaining home-ranges at or near the stations. The populations were monitored by periodic live-trapping and reproductive success was determined using field body weights and by post-mortem examination for uterine implantation scars. Survival and capture rates were estimated, using a modified Jolly-Seber markrecapture program, for each of four intervals between trapping occasions over the course of 7 weeks. There were no overall differences in survivorship between 2M and 0M females, neither type of female was caught more frequently at feeding stations and they did not differ in measures of reproductive success. However, 2M females had significantly larger home-range sizes than 0M females and thus space use may be a trait "masculinized" by prior intrauterine position. Although there are a number of life-history characteristics that differ between 0M and 2M females in the laboratory that we did not test specifically in the field, our findings and other features of wild house mouse biology suggest that prior intrauterine position does not have a strong effect on survival and reproduction in the wild.

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Zielinski, W. J.; vom Saal, F. S.; Vandenbergh, J. G. 1992. The effect of intrauterine position on the survival, reproduction and home range size of female house mice (Mus musculus). Behav. Ecol. Sociobiol 30:185-191

 


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