...Kang Nian Yap; Donald R. Powers; Melissa L. Vermette; Olivia Hsin-I. Tsai; Tony D. Williams ABSTRACT Free-living animals often engage in behaviour that involves high rates of workload and results in high daily energy expenditure (DEE), such as reproduction. However, the evidence for elevated DEE...

...Kang Nian Yap; Donald R. Powers; Melissa L. Vermette; Olivia Hsin-I Tsai; Tony D. Williams ABSTRACT Foraging at elevated rates to provision offspring is thought to be an energetically costly activity and it has been suggested that there are physiological costs associated with the high workload...

... success and survival). Nevertheless, the physiological mechanisms that allow some individuals to support higher foraging performance, and the mechanisms underlying costs of high workload, remain poorly understood. We experimentally manipulated foraging behaviour in zebra finches ( Taeniopygia guttata...

... 2008 © The Company of Biologists Limited 2008 2008 foraging costs food restriction workload daily energy expenditure (DEE) resting metabolic rate (RMR) allocation trade-offs Energy balance is a key mediator of individual survival and reproductive output in free-living animals...