Biol Reprod Keystone Symposia Conference on Frontiers in Reproductive Biology & Regulation of Fertility.
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Biology of Reproduction, Vol 31, 83-88, Copyright © 1984 by Society for the Study of Reproduction

ARTICLES

Energy allocation and reproductive development in wild and domestic house mice

FH Bronson

The growing mammal has many competing demands for energy, including some that are associated specifically with reproductive development. The concern of the present experiment was with the effect of domestication on energy allocation in relation to puberty. Food consumption, rate of growth, fertility onset, fat deposition and spontaneous locomotor activity were compared during peripubertal development in both sexes of two stocks of house mice, one wild and one domestic. The onset of fertility occurred much earlier in CF-1 females than it did in wild females; in sharp contrast the males of these two stocks achieved fertility at the same time. Food consumption, growth rate and final body weight were greater and locomotor activity was depressed in both sexes of the domestic stock. Proportionately less fat was deposited throughout development in CF-1 females when compared to wild females; fat deposition increased during development in CF-1 males while decreasing in wild males. Most of the energy-related differences noted here are compatible with a hypothesis that selection during domestication has focused on the need for a larger mass of the female mouse which, in turn, has been required to support a larger litter size. With specific regard to the reproductive development of the female, the data presented here are not compatible with the hypothesis that the first ovulation is regulated directly by critical amounts of body fat.


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Copyright © 1984 by the Society for the Study of Reproduction.