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Issue:ISSN 1000-7083
          CN 51-1193/Q
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Your Position :Home->Past Journals Catalog->2010 Vol.29 No.5

Weight Allocation of Limb Long Bones of Four Small Mammal Species
Author of the article:LIN Gong-hua1, 2, XIE Jiu-xiang1, 2, SU Jian-ping1, ZHANG Tong-zuo1*
Author's Workplace:(1. Key Laboratory of Adaptation and Evolution of Plateau Biota, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008, China; 2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China)
Key Words:small mammal; limb long bone; weight allocation; resource competition
Abstract:Weight distribution and relationships among of limb long bones (humerus, radius-ulna, femur, and tibia-fibula) of four small mammal species, Myospalax cansus, Rattus norvegicus, Ochotona curzoniae and Microtus oeconomu,were analyzed. The results showed that: i) M. cansus had heavier forelimb long bones than hind limb and its radius-ulna was also heavier than the humerus, indicating its adaptation to digging as a typical subterranean rodent species; ii) although R. norvegicus and O. curzoniae belong to different families and have very different life styles from each other, the weight distributions of their limb long bones were very similar; iii) significant correlations among limb long bones in each species were detected, moreover, the correlation coefficients ranked as follows: M. cansus>R. norvegicus>M. oeconomu>O. curzoniae,reflecting the species with different limb long bones have different requires for the harmony of digging activities; iv) at the weight percentage level, the proximal long bones (humerus or femur) were usually negatively correlated with the distal long bones (radius-ulna or tibia-fibula), while the relationships with proximal or distal long bones were weak (except for a positive correlation between humerus or femur in M. cansus), and we suggested that the proximal and distal long bones belonged to two competitive resource allocation groups.
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