When carnivores are “full and lazy“

Oecologia 152(2)
Oecologia 152(2)

Jonathan M. Jeschke— 2007

Are animals usually hungry and busily looking for food, or do they often meet their energetic and other needs in the 24 h of a day? Focusing on carnivores, I provide evidence for the latter scenario. I develop a model that predicts the minimum food abundance at which a carnivore reaches satiation and is released from time constraints. Literature data from five invertebrate and vertebrate species suggest that food abundances experienced in the field often exceed this threshold. A comparison of energetic demands to kill rates also suggests that carnivores often reach satiation: for the 16 bird and mammal species analyzed, this frequency is 88% (average across species). Because pressure of time would likely lead to trade-offs in time allocation and thus to a nonsatiating food consumption, these results suggest that carnivores are often released from time constraints.

TitelWhen carnivores are “full and lazy“
VerfasserJonathan M. Jeschke
VerlagSpringer (Germany)
ThemaEnergy-time budgets, Functional Responses, Kill rates, Principle of stringency, Time constraints
Kennungdoi: 10.1007/s00442-006-0654-2
Erschienen inOecologia, Volume 152, Issue 2, pp 357-364 (May 2007)
Rechte© Springer-Verlag 2007