When does physiology limit the foraging behaviour of freely diving mammals

By Daniel P. Costa, Carey E Kuhn, M. Weise, S. Shaffer, J. Arnould. 2004

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A conceptual model of the variation in parental attendance in response to environmental fluctuation : foraging energetics of lactating sea lions and fur seals (2007, background): “In contrast, benthic foraging fur seals and sea lions spend more of their time diving while at sea and normally operate closer to their maximum aerobic diving ability (Costa and Gales, 2003; Costa et al., 2004).”
Multiple foraging strategies in a marine apex predator, the Galapagos sea lion Zalophus wollebaeki (2008, background): “DISCUSSION Diving behaviour and foraging strategies Different modes of marine predator foraging patterns or strategies (epipelagic, mesopelagic and benthic) (Costa et al. 2004) are typically associated with different geographic regions or habitats.”
Historic diet change of the South American sea lion in Patagonia as revealed by isotopic analysis (2009, background): “…sea lion · Otaria flavescens · Dietary shift · Stable isotopes · Bone · Fishery interactions · Discarded fish Resale or republication not permitted without written consent of the publisher Mar Ecol Prog Ser 384: 273–286, 2009 duction in food availability caused by fishing (Costa et al. 2004).”