Tal Avgar

Publications48
h-index23
Citations1,993
Highly Influential Citations89
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Spatial memory and animal movement.
TLDR
This work draws together research from several disciplines to understand the relationship between animal memory and movement processes, and frames the problem in terms of the characteristics, costs and benefits of memory as outlined in psychology and neuroscience. Expand
Integrated step selection analysis: bridging the gap between resource selection and animal movement
TLDR
iSSA relies on simultaneously estimating movement and resource selection parameters, thus allowing simple likelihood-based inference of resource selection within a mechanistic movement model and demonstrates the utility of iSSA as a general, flexible and user-friendly approach for both evaluating a variety of ecological hypotheses, and predicting future ecological patterns. Expand
Environmental and individual drivers of animal movement patterns across a wide geographical gradient.
TLDR
It is shown that a great deal of observed variability in movement patterns across space and time can be attributed to local environmental conditions, with residual individual differences that may reflect spatial population structure. Expand
Animal movement tools (amt): R package for managing tracking data and conducting habitat selection analyses
TLDR
The R package amt (animal movement tools) is presented, that allows users to fit SSFs to data and to simulate space use of animals from fitted models and provides tools for managing telemetry data. Expand
An empirically parameterized individual based model of animal movement, perception, and memory
TLDR
It is shown that the model can reproduce descriptive probes of movement paths with little sensitivity to the scale at which these paths were sampled and the merits of the approach are discussed in the context of movement- and cognitive-ecology and evolution. Expand
Space-use behaviour of woodland caribou based on a cognitive movement model.
TLDR
The results support the notion that caribou rely on limited sensory inputs from their surroundings, as well as on long-term spatial memory, to make informed movement decisions, and demonstrate how sensory, memory and motion capacities may interact with ecological fitness covariates to influence movement decisions by free-ranging animals. Expand
Moving in the Anthropocene: Global reductions in terrestrial mammalian movements
TLDR
Using a unique GPS-tracking database of 803 individuals across 57 species, it is found that movements of mammals in areas with a comparatively high human footprint were on average one-half to one-third the extent of their movements in area with a low human footprint. Expand
On the adaptive benefits of mammal migration
TLDR
Several alternate hypotheses for the evolution of migration in mammals based on improvements in energetic gain and mate-finding contrasted with reduction in energetic costs or the risk of predation and parasitism are reviewed. Expand
Estimating utilization distributions from fitted step-selection functions
Habitat-selection analyses are often used to link environmental covariates, measured within some spatial domain of assumed availability, to animal location data that are assumed to be independent.… Expand
Rotifer population spread in relation to food, density and predation risk in an experimental system.
TLDR
This work measured rates of spread for many populations of the rotifer Brachionus calyciflorus in a suite of well-replicated experiments and provides direct experimental evidence that rates of population spread are conditional on population density, food availability, body condition and predation risk. Expand
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