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[F-3.1.2 Mechanism of Reduction of Genetic Variation in Endangered Wildlife]

[Contact Person]

Shingo Miura
Forest Zoology Section, Forest Biology Section, Forestry and Forest
Products Research Institute, Ministry of Agricutlure, Forestry and Fisheries
1 Matsunosato, Kukizaki-machi, Inashiki-gun, Ibaraki 305, JAPAN
Phone: +81-298-73-3211(ext.408), Fax: +81-298-73-1543

[Total Budget for FY1993-1995]

27,224,000 Yen (FY1995 8,861,000 Yen)

[Abstract]

　A present distribution and troop size of Japanese macaques, Macaca fuscata, were investigated in Tohoku District by radio-tracking. We also examined mtDNA variations by RFLP analysis to assess genetic variability. The degree of differentiation was small between groups within local populations but large between local populations. Using two hypervaribale DNA markers, we examined spatial genetic structures and the mating system of the grey-side vole, Clethrionomys rufocanus. Four clusters of related females in three out of 13 matrilineal lineages were detected. Random mating was also suggested. We have studied the present distribution and habitat destruction of black woodpecker, Dryocopus martius, and Amami rabbit, Pentalagus furnessi, and collected some samples for extracting DNA. Demographic MVP(minimum viable population) size for Asian black bear(Ursus thibetanus) population was calculated from simulation model based on reviewing its life history traits. MVP size was estimated to be >100 individuals for avoiding extinction at 50 years later with <10% probability.

[Key Words]

Endangered Species, Genetic Variation, Habitat, Minimum Viable Population Size