北海道東部地方のキタキツネの齢構成 A PRELIMINARY STUDY OF THE AGE STRUCTURE OF THE RED FOX IN EASTERN HOKKAIDO
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The age composition of 362 red foxes, Vulpes vulpes shrencki KISHIDA, which were collected in eastern Hokkaido during the autumn and winter of 1970-1973,was determined by examination of the annual layers of canine tooth cementum and the fusion of the cranial sutures. The average percentage of individuals younger than 1 year old was 67% during the three-year study period. Some of the red foxes survived longcr in eastern Hokkaido than in other districts. The survivorship curve was estimated for the population surveyed.
- JAPANESE JOURNAL OF ECOLOGY
JAPANESE JOURNAL OF ECOLOGY 30(2), 103-108, 1980
The Ecological Society of Japan