Population density and group composition of Japanese sika deer (Cervus nippon yakushimae) in an evergreen broad-leaved forest in Yakushima, southern Japan
Population density and group composition of Japanese sika deer (Cervus nippon yakushimae) in an evergreen broad-leaved forest in Yakushima, southern Japan
复制标题
日本南部屋久岛常绿阔叶林中梅花鹿的种群密度和群体组成
DOI：
10.1046/j.1440-1703.2003.00571.x
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发表时间：
2003
影响因子：
2
通讯作者：
Toshiaki Tanaka
中科院分区：
文献类型：
--
作者：
N. Agetsuma;Hideki Sugiura;D. Hill;Yoshimi Agetsuma;Toshiaki Tanaka
从1998年至2001年，对日本南部屋久岛万年青阔叶林中日本西卡（Cervus nippon yakushimae黑田和Okada）的种群密度进行了4年的调查。建立了两个约50公顷的研究地点，即Hanyama和Kawahara，每个地点共有4公里的普查路线。两个地点的西卡鹿密度估计值在半山为43-70只鹿km−2，在川原为63-78只鹿km−2，尽管这些值可能被低估。在Hanyama，成年雄性数量：成年雌性数量的性别比范围为0.6 - 1.0，在Kawahara为0.4 - 0.9。平均群体大小为1.9只鹿（雄性组，1.5只鹿;雌性组，1.6只鹿;混合组，3.6只鹿）。与日本其他地点相比，西卡鹿的种群密度相对较高，但非常小的岛屿（<10平方公里）除外。讨论了屋久岛万年青阔叶林中自然高密度西卡鹿的可能解释。
The population density of Japanese sika deer (Cervus nippon yakushimae Kuroda and Okada) in an evergreen broad-leaved forest in Yakushima, southern Japan, was surveyed over 4 years from 1998 to 2001. Two approximately 50 ha study sites, Hanyama and Kawahara, were established with a total of 4 km of census trails at each site. The estimated densities of sika deer at the two sites were 43–70 deer km−2 at Hanyama and 63–78 deer km−2 at Kawahara, although these values might be underestimates. The adult sex ratio (number of adult males : number of adult females) ranged from 0.6 to 1.0 at Hanyama, and from 0.4 to 0.9 at Kawahara. Mean group size was 1.9 deer (male group, 1.5 deer; female group, 1.6 deer; mixed group, 3.6 deer). The population density of sika deer was relatively high compared to other sites in Japan, with the exception of very small (<10 km2) islands. Possible explanations for this naturally high density of sika deer in an evergreen broad-leaved forest in Yakushima are discussed.