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USING CARBON AND NITROGEN ISOTOPE VALUES TO INVESTIGATE MATERNAL STRATEGIES IN NORTHEAST PACIFIC OTARIIDS
We examine the utility of stable carbon and nitrogen isotope variations to characterize the length of the nursing/lactation period and age at weaning for two northern Pacific otariid species, theExpand
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The Gulf of California: Review of ecosystem status and sustainability challenges
The Gulf of California is unique because of its geographical location and conformation. It hosts diverse ecosystems and important fisheries that support industry and provide livelihood to coastalExpand
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Multiple foraging strategies in a marine apex predator, the Galapagos Sea Lion
Three fundamental foraging patterns in air-breathing marine vertebrates have been described: epipelagic, mesopelagic and benthic. Many sea lion species with access to extensive continental shelvesExpand
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Inferring spatial structure from time‐series data: using multivariate state‐space models to detect metapopulation structure of California sea lions in the Gulf of California, Mexico
Summary 1. Understanding spatial structure and identifying subpopulations are critical for estimating population growth rates and extinction risk, and as such essential for e!ective conservationExpand
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Polychlorinated biphenyls and polybrominated diphenyl ethers in Galapagos sea lions (Zalophus wollebaeki).
Concentrations of polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), polychlorinated dibenzo-p-dioxins (PCDDs), and polychlorinated dibenzofurans (PCDFs) were measured inExpand
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Multiple foraging strategies in a marine apex predator, the Galapagos sea lion Zalophus wollebaeki
Three fundamental foraging patterns in air-breathing marine vertebrates have been described: epipelagic, mesopelagic and benthic. Many sea lion species with access to extensive con- tinental shelvesExpand
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Individual trophic specialisation and niche segregation explain the contrasting population trends of two sympatric otariids
Abstract Individual specialisation is increasingly recognised to be an ecological and evolutionary process having important consequences for population dynamics of vertebrates. The South American furExpand
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Stable isotopes indicate differing foraging strategies in two sympatric otariids of the Galapagos Islands
Abstract The feeding behavior of marine predators varies with the level of competition to which they are exposed. Populations living in the same or overlapping geographic regions (sympatric) areExpand
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Prepartum and postpartum trophic segregation between sympatrically breeding female Arctocephalus australis and Otaria flavescens
Abstract In Uruguay, the South American fur seal population (Arctocephalus australis) is increasing, whereas the South American sea lion (Otaria flavescens) population is declining. Previous researchExpand
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