Comparative physiology has developed a rich understanding of the physiological
adaptations of organisms, from microbes to megafauna. Despite extreme differences in size …

Otariids exhibit a semiaquatic lifestyle, feeding in the water and breeding and resting on
land. Fur seals and sea lions, the two groups of otariids, exhibit an overall income breeding …

Establishing marine species distributions is essential for guiding management and can be
estimated by identifying potential favorable habitat at a population level and incorporating …

Sympatric species evolve mechanisms to avoid competition and coexist. In the Humboldt
Current System (HCS), populations of South American sea lions (SASL, Otaria byronia) and …

Lactating Steller sea lions (SSL; Eumetopias jubatus) are income breeders, which balance
the energetic cost of provisioning a pup with alternating periods of foraging at sea and …

The trophic behavior of marine predators varies according to the level of competition to
which they are exposed. In general, populations that inhabit lower productivity systems face …

There has been a general reduction in the abundance and spatial distribution of many
marine species across habitats worldwide during the past two centuries (Costello et al …

Bottlenose dolphins (Tursiops truncatus) are highly versatile breath-holding predators that
have adapted to a wide range of foraging niches from rivers and coastal ecosystems to deep …

An understanding of the mechanisms that shape animal-population dynamics is a
fundamental consideration in conservation biology and ecology. Populations of the species …

We analyzed spatial, temporal, and age/sex variation in the diet of the South American sea
lions (SASL, Otaria byronia) in southern Chile via δ13C and δ15N isotope analysis, with …