animal
; behavioral response
; complexity
; foraging behavior
; heuristics
; movement
; random walk method
; space use
; uncertainty analysis
; Animalia
; animal
; biological model
; Caenorhabditis elegans
; computer simulation
; feeding behavior
; motor activity
; physiology
; time factor
; Animals
; Caenorhabditis elegans
; Computer Simulation
; Feeding Behavior
; Models, Biological
; Motor Activity
; Time Factors
英文摘要:
Understanding the structural complexity and the main drivers of animal search behaviour is pivotal to foraging ecology. Yet, the role of uncertainty as a generative mechanism of movement patterns is poorly understood. Novel insights from search theory suggest that organisms should collect and assess new information from the environment by producing complex exploratory strategies. Based on an extension of the first passage time theory, and using simple equations and simulations, we unveil the elementary heuristics behind search behaviour. In particular, we show that normal diffusion is not enough for determining optimal exploratory behaviour but anomalous diffusion is required. Searching organisms go through two critical sequential phases (approach and detection) and experience fundamental search tradeoffs that may limit their encounter rates. Using experimental data, we show that biological search includes elements not fully considered in contemporary physical search theory. In particular, the need to consider search movement as a non-stationary process that brings the organism from one informational state to another. For example, the transition from remaining in an area to departing from it may occur through an exploratory state where cognitive search is challenged. Therefore, a more comprehensive view of foraging ecology requires including current perspectives about movement under uncertainty. � 2016 John Wiley & Sons Ltd/CNRS
Centre d'Estudis Avan�ats de Blanes (CEAB-CSIC), Cala Sant Francesc 14, Girona, Spain; CREAF, Cerdanyola del Vall�s, Barcelona, Spain; ICREA, Pg Llu�s Companys 23, Barcelona, Spain; Grup de F�sica Estad�stica, Departament de F�sica, Universitat Aut�noma de Barcelona, Barcelona, Spain; Department of Physics and the Donnelly Centre, University of Toronto, 60 St George St., Toronto, ON, Canada
Recommended Citation:
Bartumeus F.,Campos D.,Ryu W.S.,et al. Foraging success under uncertainty: search tradeoffs and optimal space use[J]. Ecology Letters,2016-01-01,19(11)