The influence of pheromones produced by freely growing laboratory populations on the reproductive maturation of prairie deermice following prenatal and postnatal exposure |
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Authors: | Patricia L Kipps and C Richard Terman |
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Institution: | (1) Laboratory of Endocrinology and Population Ecology, Biology Department, College of William and Mary, 23185 Williamsburg, Virginia, USA |
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Abstract: | Summary Significantly more females reared on bedding soiled by different populations reproduced by 100 days of age than those reared
on bedding soiled by the same populations (P<.1) or on clean bedding (P<.025) whereas the latter two groups did not differ significantly. Significantly greater percentages of females reproduced
in both treatments maintained on soiled bedding than was true in the populations from which the bedding came. There were no
significant differences between treatments in the weights of the reproductive organs (testes, seminal vesicles, ovaries, uteri)
or in the numbers of corpora lutea or mature follicles in the ovaries of nulliparous females. The data suggest that if there
were reproductively inhibiting pheromones influencing the population animals, they were altered or dissipated immediately
after removal of the bedding from the population enclosures or that they were nonfunctional in the absence of the population
animals. These data further suggest that the reproductive inhibition of population young is due to the presence of the populaton
animals and that sociobiological factors within the populations act to prevent the reproductively stimulating influence of
materials which may be present. |
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Keywords: | |
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