The effect of the presence of an adult male on the time of puberty in the female guinea pig.

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  • 雌モルモットの春機発動時期に及ぼす成熟雄同居の効果
  • メス モルモット ノ シュンキ ハツドウ ジキ ニ オヨボス セイジュク ユウ

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Abstract

In order to examine the effect of a cohabitant on the sexual maturation of the guinea pig, Har-tley strain females were cohabited with an adult female, an adult male, or an immature male from weaning (1 or 2-week-old). <BR>These females were kept under daily observation for vaginal opening and body weight. <BR>Following results were obtained. <BR>1) Females cohabited with an adult male showed vaginal opening 8-10 days earlier than females reared without any cohabitants (P<O.01). <BR>2) The average body weight at vaginal opening in females (weaned at 2-week-old) with an adult male was lighter than females without a cohabitant (P<O.01). <BR>3) Some of females with an adult male mated during the first vaginal opening, and delivered normally.

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