Maximum energy assimilation rates in the Djungarian hamster (Phodopus sungorus)
Maximum energy assimilation rates in the Djungarian hamster (Phodopus sungorus)
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DOI：
10.1007/bf00379282
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发表时间：
1987-05
期刊：
影响因子：
2.7
通讯作者：
J. Weiner
中科院分区：
文献类型：
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作者：
J. Weiner
利用食物平衡法和呼吸测定法，对准噶尔仓鼠（Phodopus sungorus）的能量收支进行了生理极限估计。在-2 ° C条件下，夏季驯化的繁殖不活跃的仓鼠能平衡能量收支，经渐冷驯化后，其同化能量为91.1 kJ·animal-1· day-1，而未驯化的仓鼠则表现为能量负平衡，同化能量仅为54.4 kJ·animal-1·day-1。在相同的环境温度下，经产雌性（尽管当时既未妊娠也未哺乳）保持正能量平衡，吸收81.6 kJ·动物-1·天-1。仓鼠能够快速调整其最大同化率以满足其当前的能量需求，但只能达到约3.5xBMR的值。它的结论是，小型哺乳动物的实际能量预算保持，所有的时间，相当接近生理上限，身体储备准备缓冲短期振荡。
Physiological limits to energy budgets were estimated in Djungarian hamsters (Phodopus sungorus) using food balance and respirometric methods. The summer acclimatized, reproductively inactive hamsters could balance their energy budget at-2° C, assimilating 91.1 kJ·animal-1· day-1after gradual cold acclimation, whereas non-acclimated hamsters showed negative energy balance assimilating only 54.4 kJ·animal-1·day-1. At the same ambient temperature, multiparous females (although neither pregnant nor lactating at the time) maintained positive energy balance assimilating 81.6 kJ·animal-1·day-1. Hamsters are capable of rapid adjustments of their maximum assimilation rates to meet their current energy demands, but only up to the value of about 3.5xBMR. It is concluded, that the actual energy budgets of small mammals keep, all the time, fairly near the upper physiological limit, with body reserves ready to buffer short-term oscillations.