三和化学研究所におけるチンパンジー妊娠100例の総括

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タイトル別名
  • A Review of 100 Pregnancies in Chimpanzees at the Sanwa Kagaku Kenkyusho
  • シリョウ サンワ カガク ケンキュウショ ニ オケル チンパンジー ニンシン 100レイ ノ ソウカツ

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抄録

The Kumamoto Primates Park, Sanwa Kagaku Kenkyusho CO., Ltd. had successfully bred chimpanzee from 1982 to 1999. The breeding statistics of 100 pregnancies, observed for the 17 years, were reviewed. The breeding females were 24 wild born and 3 captive born. Neonatal diagnoses were performed on the next day of the birth. Of 100 pregnancies, diagnosed by urinary CG test and/or ultrasonography, 11 resulted in abortions, 5 in stillbirths, and 85 in live births (containing a monozygotic twins). The mean birth weight and gestational period of 84 live born infants was 1793g (n=74, 930-2400) and 229.4 days (n=84, 181-250). Seven of 11 abortions occurred in early stage of pregnancies (45-65 days). Infant mortality in the first year of life was 10.7%: 6 died from 7 to 16 days of age, 3 died after 50 days of age. Three of dead 6 neonates were low birth weight (under 1500g). There was no infant died under 7 days of age or over 1 year of age. Perinatal mortality was calculated at 0.12. 73.2% of deliveries occurred in the nighttime (n=82). Placentaphagia were observed in 65.7% cases of 73 parturitions. The seasonal difference was significant on frequency of conceptions (χ2=10.16, p<0.02), but not significant on frequency of births (χ2=7.62, p>0.05). Twenty-nine infants were nursery-reared primarily due to inadequate maternal care (48%) or low birthweight (28%). Only one infant died under nursery-reared condition. These data provide useful information to sustain captive chimpanzee populations.

収録刊行物

  • 霊長類研究

    霊長類研究 15 (2), 243-250, 1999

    一般社団法人　日本霊長類学会

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