Bergmann规律在中华姬鼠和社鼠中有效性的检验

Validity of Bergmann's Rule in A. draco and N. confucianus,China

尽管Bergmann规律在许多生物类群中得到了验证,然而其在啮齿动物中的有效性却存在较大争议.本文以主要分布于我国姬鼠属(Apodemus)的中华姬鼠(A.draco)以及白腹鼠属(Niviventer)的社鼠(N.confucianus)为模式动物,通过头骨颅基长与纬度、海拔间的相关关系对Bergmann规律进行了检验.结果发现中华姬鼠和社鼠头骨颅基长与纬度之间无显著相关性,与海拔间具有显著正相关,表明Bergmann定律在中华姬鼠和社鼠中并没有广泛适用性.分析认为啮齿动物体型大小的变化可能是多因素综合作用的结果,因此在不同物种之间以及同一物种的不同种群之间皆可能有所不同.

Although Bergmann＇s rule was tested to be valid among many biological fauna,extenstive controversy on its validty still exists in rodents.In this research,we used A.draco of Apodemus and N.confucianus in Niviventer as models animals to testify the rule based upon the relationship between skull basal length and latitude and altitude.The results indicated that no significant positve relationship existed in A.draco and N.confucianus between their skull base length and latitude,and in A.draco and N.confucianus between their skull basal length and altitude.Furthermore,significant negative relationship was found in N.confucianus between their skull basal length and latitude.These results highlighted that the rule can not be applied to all species under the two genus.Their body sizes seemed not to be determined by single,but multiple factors,such as climate,diet,predation,competition,and lifestyle as well.