Factor analysis of geographic variations and molecular

本研究分析了日本鼹鼠属（Mogera）的地理大小变化及分子进化的影响因素。其中，日本鼹鼠属（Mogera）的260份标本来自本州和四国27个地点，日本鼹鼠属（mogura）的280份标本来自本州、四国和九州23个地点，日本鼹鼠属（mogura）的41份标本来自本州和佐渡岛（Sado Island）。作为大小变化的生境因子，生境面积大小（以稻田面积表示）、土壤硬度，采用附近气象站采集的5个气象资料进行回归分析。鼠鼠的地理大小变化与生境面积的大小呈正相关，但与气温和降水的关系因鼠鼠种类而异：乌古拉鼠的大小与平均最低气温呈负相关，小鼠的大小与年平均气温呈正相关。土壤硬度（软土深度）与摩尔大小无显著相关。细胞色素c氧化酶亚基I基因的核苷酸序列和20个位点的同工酶分析与Abe（1967）提出的鼹鼠分类一致，表明鼹鼠在当地种群中存在一定的种内变异。

We analized factors of geographic size variations and molecular evolution of Japanese moles, genus Mogera, Consisting of 260 specimens from 27 localities in Honshu and Shikoku in M.minor, 280 specimens from 23 localities in Honshu, Shikoku and Kyushu in M.wogura, and 41 specimens from Honshu and Sado Island in M.tokudae. As the habitat factors for the size variations, the size of habitat area (indicated by the area of paddy field), soil hardness, five meteorological data taken by nearby meteorological stations were employed for regression analysis. Geographic size variations of moles showed positive correlation with the size of habitat area, but the relation with temperature and precipitation was different according to the species of moles : The size of M.wogura varied negatively with mean minimum temperature and that of M.minor had a positive correlation with yearly mean temperature. Soil hardness (soft soil depth) did not have any significant correlation with the size of mole.The nucleotide sequences of the cytochrome c oxidase subnit I gene and isozyme anaysis of 20 loci well agreed the mole taxonomy presented by Abe (1967) and showed that there are some intraspecific variations in local populations of the moles.