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EIA Database

Regional variability in diving physiology and behavior in a widely distributed air-breathing marine predator, the South American sea lion Otaria byronia

2016
Open Access Peer Reviewed Publication

Journal of Experimental Biology

Huckstadt, L. A., M. S. Tift, F. Riet-Sapriza, V. Franco-Trecu, A. M. Baylis, R. A. Orben, J. P. Arnould, M. Sepulveda, M. Santos-Carvallo, J. M. Burns, and D. P. Costa

Our understanding of how air-breathing marine predators cope with environmental variability is limited by our inadequate knowledge of their ecological and physiological parameters. Because of their...
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Keywords: Aerobic dive limit, Diving, Oxygen stores, Pinniped, South America

Marine foraging ecology influences mercury bioaccumulation in deep-diving northern elephant seals

2015
Open Access Peer Reviewed Publication

Proceedings of the Royal Society B: Biological Sciences

Peterson, S.H, Ackerman, J.T & Costa, D.P

Mercury contamination of oceans is prevalent worldwide and methylmercury concentrations in the mesopelagic zone (200–1000 m) are increasing more rapidly than in surface waters. Yet mercury...
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Keywords: Biogeochemistry, Marine mammal, Mesopelagic predator, Methtylmercury, Pinniped, Spatial ecotoxicology

The energetic consequences of behavioral variation in a marine carnivore

2018
Open Access Peer Reviewed Publication

Ecology and Evolution

E McHuron, SH Peterson, LA Huckstadt, SR Melin, JD Harris, and DP Costa

Intraspecific variability in foraging behavior has been documented across a range of taxonomic groups, yet the energetic consequences of this variation are not well understood for...
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Keywords: California sea lion, Doubly labeled water, Field metabolic rate, Foraging behavior, Intraspecific variation, Pinniped

Top down and bottom up influences on demographic rates of Antarctic fur seals Arctocephalus gazella

2013
Open Access Peer Reviewed Publication

The Journal of Animal Ecology

Schwarz, L., Goebel, M., Costa, D. and Kilpatrick, M.

1. Two major drivers in population dynamics are bottom-up processes, such as environmental factors that affect foraging success, and the top-down impacts of predation. 2. Many...
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Keywords: Antarctic oscillation, Cormack Jolly, Detection probability, El Nino southern oscillation, Pinniped, Seber, Shetland Islands, Southern annular mode, Tag loss