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

@inproceedings{PolischukUseOS,
  title={Use of stable-carbon and-nitrogen isotopes to assess weaning and fasting in female polar bears and their cubs},
  author={Svitlana Polischuk and Keith A Hobson and M. A. Ramsay}
}
In some species, stable-isotope techniques can provide insights into dietary regimens where there are tempo ral shifts in trophic level or feeding frequency. We determined stable carbon ( δ13C) and nitrogen ( δ15N) isotope values for plasma and milk proteins and δ13C values for milk lipids from female polar bears ( Ursus maritimus) and cubs to (i) ascertain whether cubs are at a higher trophic level than their mothers as a result of nursing and whether we can determine when weaning occurs, and… CONTINUE READING
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