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《Acta Zoologica Sinica》 1963-04
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A SUPPLEMENTARY STUDY ON THE CHANGING TENDENCIESOF THE RODENT POPULATION IN THE RECENT CUT-OVERLAND AT DAILING, NORTH-EASTERN CHINA

HSIA WU-PING & CHU SHENG-KAN (Institute of Zoology, Academia Sinica)  
On the basis of our former work (Hsia, 1958), the changing tendencies of rodent population in the recent cut-over land were again studied during 1958-60. New material indicated that the dominant species, Apodemus speciosus and Clethrionomys rutilus showed a tendency of decreasing in number after logging, but the density of C. rufocanus in the cut-over land was higher than that in the forest. In comparing the population densities of these rodents in the lands, of which the forests were cut in different years, it was found their population densities were decreased gradually.With respect to the changes of the rodent community during the seven years after logging, Apodemus speciosus and Clethrionomys rutilus decreased in the percentage composition at first, but began to recover at the fifth year after logging. A. speciosus recovered more slowly than C. rutilus. On the contrary, C. rufocanus increased suddenly in the percentage composition after the cutting of the forest and did not decrease until the fifth year after logging (fig. 4).
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