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EIA Database

Evaluating gain functions in foraging bouts using vertical excursions in northern elephant seals

2017
Pay-walled Peer Reviewed Publication

Animal Behaviour

Ferraro, M. S., R. R. Decker, D. P. Costa, P. W. Robinson, D. S. Houser, and D. E. Crocker

The marginal value theorem models patch departure decisions for foraging animals when resources are unevenly distributed. A key component of these models is the decelerating energy...
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Keywords: Gain function, Marine predator, Optimal foraging, Patch residence, Phocid

Searching for prey in a three-dimensional environment: hierarchical movements enhance foraging success in northern elephant seals

2016
Open Access Peer Reviewed Publication

Functional Ecology

Adachi, T., D. P. Costa, P. W. Robinson, S. H. Peterson, M. Yamamichi, Y. Naito, and A. Takahashi

1. Foraging theory predicts that predators adjust their movements according to the spatial distribution of prey. Since prey is often patchily distributed, area-restricted search (ARS) behaviour,...
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Keywords: Area-restricted search, Bio-logging, Foraging behaviour, Hierarchical patch system, Lévy walk, Marine predator, Scale-dependent movement, Three-dimensional movement

Constrained by consistency? Repeatability of foraging behavior at multiple timescales for a generalist marine predator

2018
Pay-walled/Intertek link Peer Reviewed Publication

Marine Biology

Mchuron, E. & Hazen, E.L

Marine predators frequently exhibit consistency in foraging behaviors despite the dynamic nature of marine ecosystems, which has the potential for ecological and evolutionary implications depending on...
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Keywords: Behavioural consistency, Forgaging, Marine predator

Measurements of foraging success in a highly pelagic marine predator, the northern elephant seal

2010
Open Access Peer Reviewed Publication

Journal of Animal Ecology

Robinson, P., Simmons, S., Crocker, D. and Costa, D

1. Identification of foraging behaviour and the ability to assess foraging success is critical to understanding individual and between-species variation in habitat use and foraging ecology....
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Keywords: Buoyancy, Drift rate, Marine mammal, Marine predator, Tracking, Transit rate