Saving energy during hard times: energetic adaptations of Shetland pony mares
Saving energy during hard times: energetic adaptations of Shetland pony mares
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DOI：
10.1242/jeb.111815
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发表时间：
2014-12-01
影响因子：
2.8
通讯作者：
Riek, Alexander
中科院分区：
文献类型：
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作者：
Brinkmann, Lea;Gerken, Martina;Riek, Alexander
最近的研究结果表明，在环境温度低和食物短缺的情况下，野生北方食草动物的新陈代谢会减少，以减少它们的能量需求。然而，尚不清楚家养动物是否也能减少它们的能量消耗。我们将10匹设得兰矮种马暴露在不同的环境条件（夏季和冬季）和两种食物量（维持能量需求的60%和100%）下，以检查能量和行为反应。夏季小马的田间代谢率（FMR为63.4 +/- 15.0 MJ d(-1)）明显高于冬季限食和对照马（分别为24.6 +/- 7.8和15.0 +/- 1.1 MJ d(-1)）。在夏季，运动活动、静息心率和总水分周转量显著升高(P
Recent results suggest that wild Northern herbivores reduce their metabolism during times of low ambient temperature and food shortage in order to reduce their energetic needs. It is, however, not known whether domesticated animals are also able to reduce their energy expenditure. We exposed 10 Shetland pony mares to different environmental conditions (summer and winter) and to two food quantities (60% and 100% of maintenance energy requirement) during low winter temperatures to examine energetic and behavioural responses. In summer, ponies showed a considerably higher field metabolic rate (FMR; 63.4 +/- 15.0 MJ day(-1)) compared with food-restricted and control animals in winter (24.6 +/- 7.8 and 15.0 +/- 1.1 MJ day(-1), respectively). During summer, locomotor activity, resting heart rate and total water turnover were considerably elevated (P