ACTIVE AND RESTING METABOLISM IN BIRDS - ALLOMETRY, PHYLOGENY AND ECOLOGY
ACTIVE AND RESTING METABOLISM IN BIRDS - ALLOMETRY, PHYLOGENY AND ECOLOGY
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DOI：
10.1111/j.1469-7998.1987.tb03708.x
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发表时间：
1987-10-01
影响因子：
2
通讯作者：
HARVEY, PH
中科院分区：
文献类型：
--
作者：
BENNETT, PM;HARVEY, PH
鸟类的静息代谢率变化与体重差异密切相关。最低的分类水平，在大多数的静态代谢率和体重的变化是明显的样品是家庭之间的订单。跨家系点的异速生长指数为0.67。该指数符合基于热量损失考虑的代谢定标的表面积解释。家庭点从异速生长线的偏差被用来研究如何休息代谢率不同类群之间，以及是否在休息代谢率的变化与生态和行为的广泛差异。尽管休息代谢率和体重之间的强相关性，有证据表明，适应偏离异速生长线，并讨论了可能的选择力。将活性代谢率的异速生长标度与静息代谢率的异速生长标度进行比较。两个水平的能量消耗的异速生长指数不同，表明活跃的小型鸟类需要更多的能量，每单位时间以上的休息水平比活跃的大型鸟类。未发现一致的证据表明用于估计活性代谢率的不同方法导致系统偏倚。鸟类在进行繁殖活动时比在年周期的其他阶段需要更多的能量。
Variation in resting metabolic rate is strongly correlated with differences in body weight among birds. The lowest taxonomic level at which most of the variance in resting metabolic rate and body weight is evident for the sample is among families within orders. The allometric exponent across family points is 0.67. This exponent accords with the surface area interpretation of metabolic scaling based on considerations of heat loss. Deviations of family points from this allometric line are used to examine how resting metabolic rates differ among taxa, and whether variation in resting metabolic rate is correlated with broad differences in ecology and behaviour. Despite the strong correlation between resting metabolic rate and body weight, there is evidence for adaptive departures from the allometric line, and possible selective forces are discussed. The allometric scaling of active metabolic rate is compared with that of resting metabolic rate. The allometric exponents for the two levels of energy expenditure differ, demonstrating that active small-bodied birds require proportionately more energy per unit time above resting levels than do active large-bodied birds. No consistent evidence was found to indicate that the different methods used to estimate active metabolic rate result in systematic bias. Birds require more energy relative to body size when undertaking breeding activities than at other stages of the annual cycle.