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POPULATION ECOLOGY OF THE RED-BELLIED TREE SQUIRREL (CALLOSCIURUS ERYTHRAEUS) IN JAPANESE FIR PLANTATIONS IN TAIWAN (AGE DEFERMINATION, HOME RANGE, SOCIAL BEHAVIOR).

SHAO-PIN. YO ProQuest Information and Learning Co.; University of California, Davis. 1986

Dissertation Abstracts International 47-08B.

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題名:
POPULATION ECOLOGY OF THE RED-BELLIED TREE SQUIRREL (CALLOSCIURUS ERYTHRAEUS) IN JAPANESE FIR PLANTATIONS IN TAIWAN (AGE DEFERMINATION, HOME RANGE, SOCIAL BEHAVIOR).
著者: SHAO-PIN. YO
ProQuest Information and Learning Co.; University of California, Davis.
主題: Ecology; Electronic books
所屬期刊: Dissertation Abstracts International 47-08B.
描述: The population ecology of red-bellied tree squirrels (Callosciurus erythraeus) was studied at Chitou, an experimental forest station of National Taiwan University, by using mark-recapture method from August 1978 to May 1983. Multiple recapture data were used to analyze the life history, home range dynamics and population dynamics of red-bellied tree squirrels.
Home range of resident squirrels was measured with a non-parametric method. The mean home range of squirrels in summer was smaller than the mean home range of squirrels in other seasons. Adult female squirrels occupied stable home ranges, while adult males and subadults shifted their home ranges with food fluctuation in the habitat and reproductive seasons. Subadult squirrels shifted their home range apparently so as not to compete with their mothers in winter. Food supply is more important than population density in regulating home range sizes of the squirrels.
Three population estimation methods, MNA, Jolly-Seber and Otis et al., were compared by using the same multiple recapture data. MNA was the best estimation method for red-bellied tree squirrels.
Population dynamics of red-bellied tree squirrels was analyzed to determine the impact of applying Klerat baits, warfarin baits and habitat manipulation on the squirrel populations. Treatment with Klerat baits reduced 50% of squirrel population in one year, but there were no significant changes in estimated seasonal survival rates after applying Klerat baits. The survival rate of subadults was higher than adults after applying warfarin baits.
Red-bellied tree squirrel recruitment patterns were studied in plantation number 168 and 51-5. These sites differed in habitat quality. New squirrels replaced old squirrels more rapidly in 168 than in 51-5. Subadults were likely to stay longer in a poorer habitat like 168, while adults occupied the better quality habitats like 51-5. Adult females survived better than adult males in spring and summer, while in winter adult males survived better than adult females.
Sex ratio (male/female) was not significantly different from 1:1 based on the yearly pooled data. However, the courtship behavior with groups of males chasing one female caused a male biased sex ratio in spring. The male biased subadult sex ratio suggested that subadult males have a greater tendency to disperse away from their nesting home after weaning. (Abstract shortened with permission of author.).
出版者: Thesis (Ph.D.)
建立日期: 1986
格式: 1 online resource (131 pages)..
語言: 英文
資源來源: NUTN ALEPH
NUTN ALEPH

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POPULATION ECOLOGY OF THE RED-BELLIED TREE SQUIRREL (CALLOSCIURUS ERYTHRAEUS) IN JAPANESE FIR PLANTATIONS IN TAIWAN (AGE DEFERMINATION, HOME RANGE, SOCIAL BEHAVIOR).

SHAO-PIN. YO ProQuest Information and Learning Co.; University of California, Davis. 1986

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