Use of stable-carbon and -nitrogen isotopes to assess weaning and fasting in female polar bears and their cubs

By S. C. Polischuk, Keith A. Hobson, M. Ramsay. 2001

204 citations recorded by the source corpus.

Subfields: Ecology, Global and Planetary Change

View Paper: https://www.semanticscholar.org/paper/5334c97cdd7c6058a44e7f8aea2a209cf3fe74f7

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Ecology

1. Y. Cherel
2. P. Koch
3. Keith A. Hobson
4. C. M. Kurle
5. E. Follmann
6. F. Bailleul
7. T. O'hara
8. R. I. Ruiz‐Cooley

In Global and Planetary Change

1. Y. Cherel
2. Keith A. Hobson
3. P. Koch
4. C. M. Kurle
5. T. O'hara
6. R. I. Ruiz‐Cooley
7. Diane Gendron
8. Dana L. Thomas

Citations in the corpus

• DIFFERENCES IN FORAGING LOCATION OF MEXICAN AND CALIFORNIA ELEPHANT SEALS: EVIDENCE FROM STABLE ISOTOPES IN PUPS (2006, background): “In a number of mammals, tissues from young animals or early age classes have lower 13C values than older animals (Polischuk et al. 2001, Witt and Ayliffe 2001), but in ancient human populations, the pattern is either reversed (Fuller et al. 2003) or inconsistent from individual to individual…”
• NUTRITION, PHYSIOLOGY, AND STABLE ISOTOPES: NEW INFORMATION FROM FASTING AND MOLTING PENGUINS (2005, background): “Although many studies have discussed a possible fasting effect on the interpretation of data collected in the field (Best and Schell 1996, Polischuk et al. 2001), only one work has investigated this topic in endotherms (Hobson et al. 1993).”
• Feeding ecology of phocid seals and some walrus in the Alaskan and Canadian Arctic as determined by stomach contents and stable isotope analysis (2006, background): “due to selective fractionation (DeNiro and Epstein 1977) and the ratios for the fetus and YOY suggest mobilization and transfer of carbon from maternal lipid stores to fetal development and milk production (Jenkins et al. 2001; Polischuk et al. 2001; Dehn et al. 2006b).”
• Stable-isotope ratios of blood components from captive northern fur seals (Callorhinus ursinus) and their diet: applications for studying the foraging ecology of wild otariids (2002, background): “For example, Polischuk et al. (2001) found that milk protein from female polar bears (Ursus maritimus) was significantly more enriched in 15N than their plasma.”
• Trophic relationships between sperm whales and jumbo squid using stable isotopes of C and N (2004, background): “…in tissues if adipose reserves are used preferentially as an energy source in animals with excess fat deposits (i. e. polar bears, Polischuk et al. 2001), or an increase in 15N may result when catabolism of the body’s proteins are the energy source (Hobson & Clark 1992b, Polischuk et al. 2001).”