Winter Is Coming: Seasonal Variation in Resting Metabolic Rate of the European Badger (Meles meles).
Winter Is Coming: Seasonal Variation in Resting Metabolic Rate of the European Badger (Meles meles).
复制标题
DOI：
10.1371/journal.pone.0135920
复制
发表时间：
2015
期刊：
影响因子：
3.7
通讯作者：
Scantlebury DM
中科院分区：
文献类型：
--
作者：
McClune DW;Kostka B;Delahay RJ;Montgomery WI;Marks NJ;Scantlebury DM
静息代谢率（RMR）是动物在静息时的最低能量需求的量度，并且可以给出躯体维持的成本的指示。我们测量了自由放养的欧洲獾（Meles meles）的RMR，以确定差异是否与性别，年龄和季节有关。獾被捕获在活捕笼中，并单独放置在保持在20 ± 1°C的代谢室中。使用开路呼吸测量系统测定静息代谢率。季节与RMR显著相关，但未检测到年龄或性别的影响。夏季RMR值显著高于冬季值（质量调整平均值±标准误差：分别为2366 ± 70 kJ·d-1; 1845 ± 109 kJ·d-1），百分比差异为24.7%。在麻醉影响下，估计RMR比给药前和麻醉恢复后的合并平均值低25.5%。休息代谢率在秋季和冬季是没有显着不同的异速生长预测的基础代谢率的mustelid种重量1公斤或更大，但獾在夏季测量值高于预测。结果表明，作为獾越冬策略（“冬季嗜睡”）的一部分，RMR的季节性下降与身体活动和体温的明显下降同时发生。这项研究有助于扩大中型食肉动物的生理生态数据集，并强调在预测代谢率时考虑季节的重要性。
Resting metabolic rate (RMR) is a measure of the minimum energy requirements of an animal at rest, and can give an indication of the costs of somatic maintenance. We measured RMR of free-ranging European badgers (Meles meles) to determine whether differences were related to sex, age and season. Badgers were captured in live-traps and placed individually within a metabolic chamber maintained at 20 ± 1°C. Resting metabolic rate was determined using an open-circuit respirometry system. Season was significantly correlated with RMR, but no effects of age or sex were detected. Summer RMR values were significantly higher than winter values (mass-adjusted mean ± standard error: 2366 ± 70 kJ⋅d−1; 1845 ± 109 kJ⋅d−1, respectively), with the percentage difference being 24.7%. While under the influence of anaesthesia, RMR was estimated to be 25.5% lower than the combined average value before administration, and after recovery from anaesthesia. Resting metabolic rate during the autumn and winter was not significantly different to allometric predictions of basal metabolic rate for mustelid species weighing 1 kg or greater, but badgers measured in the summer had values that were higher than predicted. Results suggest that a seasonal reduction in RMR coincides with apparent reductions in physical activity and body temperature as part of the overwintering strategy (‘winter lethargy’) in badgers. This study contributes to an expanding dataset on the ecophysiology of medium-sized carnivores, and emphasises the importance of considering season when making predictions of metabolic rate.