Stable Isotope Data from Diets and Tissues of Captive Bears Fed Experimental Diets

This dataset contains stable isotope incorporation and discrimination results for several sets of feeding experiments with captive brown and polar bears. Experiments were designed to determine the effects of dietary lipid content and fasting behavior on discrimination in blood, hair, and fat. Data are divided into three components of the study: one to estimate isotopic discrimination with varying dietary lipid content, one to estimate the potential effects of fasting on tissue isotope values, and one to determine incorporation rates of isotopes in various tissues. The experiments were conducted between 2009 and 2013 with captive grizzly bears at Washington State University and captive polar bears at the Oregon and Alaska zoos.本数据集收录了多组圈养棕熊与北极熊饲喂实验的稳定同位素掺入（stable isotope incorporation）与稳定同位素分馏（stable isotope discrimination）结果。本批饲喂实验旨在探究膳食脂质含量与禁食行为对血液、毛发及脂肪组织中同位素分馏的影响。本数据集分为该研究的三个组成部分：其一用于估算不同膳食脂质水平下的同位素分馏情况，其二用于评估禁食对组织同位素值的潜在影响，其三用于测定不同组织内的同位素掺入速率。本批饲喂实验于2009年至2013年间开展，实验对象为华盛顿州立大学圈养的灰熊，以及俄勒冈动物园与阿拉斯加动物园圈养的北极熊。