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-  2016 

季节性模拟对大绒鼠能量代谢的影响
Effect of Seasonal Simulation on Energy Metabolism of Eothenomys miletus

Keywords: 大绒鼠,季节模拟,能量代谢,瘦素
英文关键字: Eothenomys miletus
, seasonal simulation, energy metabolism, leptin

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Abstract:

中文摘要:本实验主要阐明大绒鼠 Eothenomys miletus在季节性模拟过程中体质量调节和能量代谢的变化。实验组大绒鼠在模拟夏季环境中(25℃,16L:8D)驯化14 d后转入模拟冬季环境中(5℃,8L:16D)驯化8 d,实验中每隔1 d测定大绒鼠的体质量、摄食量,每隔7 d测定其静止代谢率,实验结束后测定体脂含量和血清瘦素浓度。结果表明:季节性模拟条件下大绒鼠的体质量变化差异具有统计学意义( F=1.911, P<0.05),22 d后实验组体质量比对照组下降12.54%;摄食量变化差异具有高度统计学意义( F=8.850, P<0.01),22 d后实验组摄食量比对照组显著增加58.23%;静止代谢率变化差异具有高度统计学意义( F=9.969, P<0.01),22 d后实验组比对照组显著增加82.22%;体脂含量和血清瘦素浓度呈显著正相关。以上实验结果表明:大绒鼠在模拟夏季转冬季的过程中主要通过降低体质量、增加摄食量和产热等来适应冷环境的胁迫。此外,瘦素有可能参与了大绒鼠在该环境下的体质量调节。
英文摘要:In order to investigate the body mass regulation and energy metabolism of Eothenomys miletus during seasonal simulation, E. miletus were fed in the simulated summer condition (25℃, 16L:8D) for two weeks and then transferred to simulated winter condition (5℃, 8L:16D) for 8 days. Subsequently, body mass and food intake were measured every two days, resting metabolic rate (RMR) was measured every 7 days, body fat mass and serum leptin level were measured at the end of the experiment. The results showed that body mass were significantly different ( F=1.911, P<0.05) under seasonal simulation. Especially on day 22, body mass decreased 12.54% compared with that on day 0. The values of food intake were extreme significantly different ( F=8.850, P<0.01) under seasonal simulation, which increased 58.23% on day 22 compared with that on day 0. Seasonal simulation also affected RMR extreme significantly ( F=9.969, P<0.01), which increased 82.22% on day 22 compared with that on day 0. Body fat mass was positively correlated with the serum leptin level. The results suggested that E. miletus adopted to cold condition mainly by reducing body mass, increasing food intake and thermogenesis. Moreover, serum leptin levels may be involved in the body mass regulation of E. miletus. 2016,(35): 414-420 收稿日期:2016-01-09 DOI:10.11984/j.issn.1000-7083.20160013 分类号:Q959.837;Q955 基金项目:国家自然科学基金项目(31260097,31560126) 作者简介:杨涛(1991-),女,硕士研究生,研究方向:动物生理生态,E-mail:310280627@qq.com;付家豪(1991-),男,硕士研究生,研究方向:动物生理生态,E-mail:542816724@qq.com *通讯作者:朱万龙,男,副教授,研究方向:动物生理生态,E-mail:zwl_8307@163.com 参考文献: 蔡金红, 朱万龙, 王政昆. 2010. 中缅树鼩消化道长度和重量变化[J]. 动物学杂志, 45(1):140-144. 李兴升, 王德华, 杨明. 2004. 冷驯化条件下长爪沙鼠血清瘦素浓度的变化及其与能量收支和产热的关系的季节性变化[J]. 动物学报, 50(3):334-340. 柳鹏飞, 蔡金红, 朱万龙, 等. 2010. 食物限制对高山姬鼠能量代谢和内脏器官形态的影响[J]. 兽类学报, 30(3):151-156. 王蓓, 朱万龙, 练硝, 等. 2009. 横断山区高山姬鼠消化道的季节动态[J]. 生态学报, 9(4):1-6. 王德华, 王祖望. 1990. 小哺乳动物在高寒环境中的生存对策:Ⅱ高原鼠兔和根田鼠非颤抖性产热(NST)[J]. 兽类学报, 10(1):40-53. 王政昆, 孙儒泳. 1994. 中缅树静止代谢率的研究[J]. 北京师范大学学报, 6(3):408-413. 吴征镒, 王荷生. 1985. 中国自然地理——植物地理[M]. 北京:科学出版社:118-121. 张荣祖. 1999. 中国动物地理[M]. 北京:科学出版社:188-235. 张武先, 王政昆, 徐伟江, 等.

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