脇野沢村におけるニホンカモシカ<I>Capricornis crispus</I>の生態

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タイトル別名
  • Ecological Survey of Japanese Serow <I>Capricornis crispus</I> in Wakinosawa Village
  • ワキノサワムラ ニ オケル ニホンカモシカ Capricornis crisp

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Ecological survey of Japanese serow by the block count and the identification method was made in Wakinosawa Village, Aomori Prefecture from October 1975 to March 1977. Densities of serows obtained by the block count were 10.2-10.9 head/km2from July to December 1976. Further it increased to 15.6 head/km2in March 1977. This remarkable increase was probably caused by immigration from the surrounding area, because of the changes of food availabilities in the snow season. This higher density than the other results in Japan, was seemingly caused by high carrying capacity of this area where foods and covers were rich and by the geographical obstruction of the sea, surrounding this area in two directions, to the dispersal of the animals. Sightings of singles and mother-child units, both being were basic social units of this species, were abundantly gotten, but serow associations with more than three head were rarely seen. Maximum group size was recorded four. Group size of this species was probably independent upon the density changes of, at least, 5.2-15.6 head/km2. Adultfawn ratio changed from 21.4 to 63.6%.

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