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Temporal variability in stable isotope ratios of C and N in the vibrissa of captive and wild adult South American sea lions Otaria byronia : More than just diet shifts
(Wiley Blackwell Publishing, Inc, 2017-10)
We analyzed the d13C and d15N values in the vibrissae of captive adult breeding South American sea lions (Otaria byronia) fed at a constant diet and then used thisinformation to analyze the change in stable isotope values ...
Temporal and individual variation in the diet of the Neotropical otter,Lontra longicaudis(Olfers, 1818) (Carnivora, Mustelidae), as revealed by stable isotope analysis of vibrissae
(Springer, 2020-08-28)
The Neotropical otter,Lontra longicaudis, is a semiaquatic mustelid that preys upon fish, amphibians, and crustaceans, in variable proportions according to habitat and/or season. Due to the difficulty of observing this ...
Sympatric otariids increase trophic segregation in response to warming ocean conditions in Peruvian Humboldt Current System
(Public Library of Science, 2022)
Determining trophic habits of predator communities is essential to measure interspecific interactions and response to environmental fluctuations. South American fur seals, Arctocephalus australis (SAFS) and sea lions Otaria ...
Ontogenetic dietary changes in male South American fur seals Arctocephalus australis in Patagonia
(Inter-Research, 2015-04-09)
This study assessed ontogenetic dietary changes in male South American fur sealsArctocephalus australis in northern and central Patagonia (Argentina) using stable isotope ratios (δ15N and δ13C) in vibrissae and bones. ...
Peruvian Fur Seals as Archivists of El Niño Southern Oscillation Effects
(Frontiers Media, 2021)
Peru’s coastal waters are characterized by significant environmental fluctuation due to periodic El Niño- La Niña- Southern Oscillation (ENSO) events. This variability results in ecosystem-wide food web changes which are ...
Sex-specific foraging strategies and resource partitioning in the southern elephant seal (Mirounga leonina )
(The Royal Society, 2006-08)
The evolution of resource specializations is poorly understood, especially in marine systems. The southern elephant seal (Mirounga leonina) is the largest of the phocid seals, sexually dimorphic, and thought to prey ...
Testing the niche variation hypothesis in pinnipeds
(Wiley, 2022)
1. Individual trophic specialisation (ITS) has many important consequences for ecological and evolutionary processes. An old hypothesis highlighting the rel- evance of ITS is the niche variation hypothesis (NVH), which ...