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EIA Database

The extra burden of motherhood: reduced dive duration associated with pregnancy status in a deep-diving mammal, the northern elephant seal

2017
Open Access Peer Reviewed Publication

Biology Letters

Hückstädt, L. A., Holser, R. R., Tift, M. S., and Costa, D. P

The cost of pregnancy is hard to study in marine mammals, particularly in species that undergo pregnancy while diving continuously at sea such as elephant seals...
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Keywords: Biologging, Diving behaviour, Northern elephant seal, Pregnancy

Development of an animal-borne sonar tag for quantifying prey availability: Test deployments on northern elephant seals

2015
Open Access Peer Reviewed Publication

Animal Biotelemetry

Lawson, G., Huckstadt, L., Lavery, A., Jaffre, F. et al.

Background: Developments in electronic tagging technologies have provided unprecedented insight into the movements and behavior of marine predators. Concurrent information on the prey of these tracked...
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Keywords: Northern elephant seal, Prey, Sonar, Tag

Climate mediates the success of migration strategies in a marine predator

2018
Pay-walled/Intertek link Peer Reviewed Publication

Ecology Letters

Abrahms, B., E. L. Hazen, S. J. Bograd, J. S. Brashares, P. W. Robinson, K. L. Scales, D. E. Crocker, and D. P. Costa

Individual behavioural specialisation has far-reaching effects on fitness and population persistence. Theory predicts that unconditional site fidelity, that is fidelity to a site independent of past...
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Keywords: Behavioural strategy, Climate variability, Foraging ecology, Habitat selection, Individual specialisation, Migration, Mirounga angustirostris, Northern elephant seal, Resource predictability, Site fidelity

Comparisons and uncertainty in fat and adipose tissue estimation techniques: The northern elephant seal as a case study

2015
Open Access Peer Reviewed Publication

PLOS ONE

Schwarz, L., Villegas-Amtmann, S., Beltran, R., Costa, D. et al.

Fat mass and body condition are important metrics in bioenergetics and physiological studies. They can also link foraging success with demographic rates, making them key components...
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Keywords: Fat and adipose tissue, Foraging success, Northern elephant seal