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PART I. Behavior on Land and at Sea: Introduction -- Otariid Ethology: One Researcher's Historical Perspective -- When Physiology and Ecology Meet: The Interdependency Between Foraging Ecology and Reproduction in Otariids -- Maternal Behavior in Otariids and the Walrus -- PART II. Foraging Behavior -- Foraging Capacities, Behaviors and Strategies of Otariids and Odobenids -- Prey Capture and Processing in Fur Seals, Sea Lions and the Walrus -- PART III. Reproductive Behavior -- Polygyny in the Era of Molecular Biology: Revisiting Bartholomew's Model -- The Role of Females in the Evolution of Sexual Dimorphism and Mating Systems -- Site Fidelity, Male Harassment and Female Gregariousness: Factors Shaping the Highly Polygynous Mating System of the Northern Fur Seal (Callorhinus Ursinus) -- Mating Games and Raiding Parties in Southern Sea Lions -- Infanticide in Eared Seals -- Genetic Consequences of Dispersal, Philopatry and Reproductive Behaviors -- Intergeneric Fertile Hybridization in Otariids -- Visual Species Recognition and Mate Choice in Fur Seals: An Experimental Study -- PART IV. Cognitive Behavior, Communication, Personality and Behavioral Development -- Vocal Communication in Otariids and Odobenids -- Non-vocal Communication in Otariids and Odobenids: The Involvement of Visual and Olfactory Cues in Their Social Lives -- The Sensory World of Otariids -- The Mind of a Sea Lion -- The California Sea Lion: Thriving in a Human-Dominated World -- Pinniped 'Personality', or Consistent Individual Differences -- Playing at the Edge of the Sea: A Comparative Analysis in Otariids and Odobenids -- PART V. Diving Deeper into Species -- Responding to Human Influence: Southern Sea Lion Males Adapt to Harbor Habitats -- Ethology and Behavioral Ecology of the Walrus (Odobenus rosmarus), with Emphasis on Communication and Social Behavior -- Behavioral Insights into the Decline and Natural History of Steller Sea Lions -- Exploitation and Recovery of the South American Sea Lion in the Southwestern Atlantic -- Living on the Edge, the New Zealand Sea Lion -- The Enigmatic Life History of the Australian Sea Lion -- Australian Fur Seal: Adapting to Coexist in a Shared Ecosystem -- Guadalupe Fur Seals and California Sea Lions: Two Sympatric Otariids from the California Current Ecosystem -- Fur Seal Trophic Ecology in Uruguay -- Galapagos Sea Lions and Fur Seals, Adapted to a Variable World. .