高寒草甸3种啮齿动物内脏器官及相关性比较

Comparison of the Internal Organs and Correlation of Organ Weights and Body Weights of Three Rodents in Alpine Meadow

内脏器官是动物生理功能的基础,脏器质量及脏器指数能反映出动物对环境的适应。为进一步了解高原动物对各自生存环境的适应对策,本研究比较了高寒草甸3种啮齿动物脏器指数及脏器质量与体质量的相关性。结果显示:高原鼠兔的心脏、肝脏指数低于高原鼢鼠和根田鼠,根田鼠的脾脏、肺脏和肾脏指数高于高原鼢鼠和高原鼠兔,高原鼠兔的肾脏指数高于高原鼢鼠;3种动物肝脏均与体质量呈显著正相关关系,高原鼠兔和根田鼠的肾脏与体质量显著正相关,根田鼠心脏与体质量呈显著正相关关系。结果表明,不同物种脏器指数及器官与体质量的相关性差异可能是物种对物质环境、能量环境、生物个体大小、外界病原体、能量代谢需求等多方面综合因素进化适应的结果。

Internal organs of animals play an essential role in their physiological function, and their adaptiveness to the environment can be reflected from the weights of internal organs and organ index. To further understand the adaptive strategy of the animals in Qinghai-Tibet Plateau to the living environment, the index of internal organs and the correlations between organ weights and body weights were investigated in three rodents in alpine meadow. The results showed that the heart and liver of plateau pika （Ochotona curzniae） indices were lower than those of plateau zokor （Eospalax baileyi） and root voles （ Microtus oeconomus）, and the root voles had the highest indices of spleen, lung and kidney, and the kidney index of plat- eau pika was higher than that of plateau zokor. All the livers were significantly correlated with their body weights, and sig- nificant correlations were found in the kidneys of plateau pika and root voles as well as the hearts of root voles. These results indicated that the variance in the indices of internal organs and the correlations between their organ weights and body weights of three rodents may result from combined evolutionary factors, such as adaptiveness to physical and energy environment, body size, pathogens, energy metabolism demands, etc.