Epidemiological studies on the expectation of life for cats computed from animal cemetery records.

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  • 動物霊園のデータを用いた猫の平均余命の推定とその疫学的考察
  • 動物霊園のデータを用いた猫の平均余命の推定とその疫学的考察〔英文〕
  • ドウブツ レイエン ノ データ オ モチイタ ネコ ノ ヘイキン ヨメイ ノ

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Abstract

Based on the Chiang's method, the life table for cats was constructed from the death data of 3936 cats. They died in the Kanto area and were buried in an animal cemetery in Tokyo from June 1981 through May 1982. This life table seems to be the first one for domestic pet cats. The expectation of life for cats was 4.2 years at age 0, 5.0 years at age 1, 5.4 years at age 4, 5.3 years at age 5, 3.5 years at age 10, and 2.2 years at age 15. The maximum age at death was 22 years. From age 0 to age 5, the probability of dying for cats was higher than that for dogs, but over 6 years of age it seemed that Gompertz's equation was applicable to this life table for cats. From these results, if the probability of dying for cats at early ages decreases, the fundamental pattern of dying curve for cats seems to be a similar figure of dogs. The life table was constructed for different breeds and localities. Comparing the expectation of life at age 1 (e1) of the two populations divided by breeds or localities, there was significant difference in the e1 among different localities but not among different breeds. These facts suggest the existence of some factors which may influence the life span of cats among different localities.

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