Maintaining adequate energy and mass balance is necessary to the survival and
reproduction of any organism. However, nearly all organisms experience periods of …

The carbon isotope values in the exhaled breath of an animal mirror the carbon isotope
values of the metabolic fuels being oxidized. The measurement of stable carbon isotopes in …

The interactions among diet, ecology, physiology, and biochemistry affect N and C stable
isotope signatures in animal tissues. Here, we examined if ecological segregation among …

Concentrations of alternative flame retardants and polybrominated diphenyl ethers (PBDEs)
were analyzed in ringed seal (Phoca hispida) blubber collected across the Canadian Arctic …

Context The ringed seal (Phoca hispida), a small phocid seal with a circumpolar Arctic
distribution and a strong association with sea ice, occurs at the southern limit of its range in …

Almost half a century ago, researchers demonstrated that the ratio of stable carbon isotopes
in exhaled breath of rats and humans could reveal the oxidation of labeled substrates in …

Narwhals (Monodon monoceros) are sentinel species in the Arctic and to investigate marine
food web changes from 1982–2011 we examined diet using fatty acids, δ15N, and δ13C, in …

The erupted tusk of the narwhal exhibits sensory ability. The hypothesized sensory pathway
begins with ocean water entering through cementum channels to a network of patent …

The killing of large numbers of migratory bats at wind turbines is a pressing conservation
problem. Even though avoidance and mitigation measures could benefit from a better …

How organisms will fare in the face of climate change depends on their behavioral
adaptability to changing conditions. Adaptability in foraging behavior will be particularly …