Lipophilic pollutants in plasma and adipose tissue, stable isotopes in red blood cells and fatty acids in adipose tissue of polar bears from Svalbard, 2012-2013

The data show concentrations of persistent organic pollutants in plasma and adipose tissue of adult female polar bears from Svalbard sampled in spring and autumn, 2012-2013. The data was used to explore what determines the variation in concentrations of PCBs, organochlorine pesticides and brominated flame retardants in adult female polar bears from Svalbard. The predictor variables included samplig season, location, feeding habits (approximated by stable isotopes and fatty acid composition), body condition index, fasting status (the ratio between plasma urea in mmol/L and creatinine μmol/L), age (years) and breeding status. All contaminant concentrations are in ng/g wet weight in the data file, but were lipid corrected (concentration/fat%*100) in the publication (except OH-PCBs). Stable isotopes of carbon and nitrogen, d13C and d15N, were analysed in red blood cells and are shown in ‰ unit. Fatty acid composition was determined in adipose tissue and shown in % unit. Breeding status refers to females captured alone (no), or with cubs of the year (coy) or with one or two year old offspring (yrl).

本数据集包含2012-2013年春季与秋季，于斯瓦尔巴（Svalbard）群岛采集的成年雌性北极熊血浆与脂肪组织中的持久性有机污染物（persistent organic pollutants）浓度数据。该数据集被用于探究斯瓦尔巴群岛成年雌性北极熊体内多氯联苯（Polychlorinated Biphenyls，PCBs）、有机氯农药（organochlorine pesticides）以及溴化阻燃剂（brominated flame retardants）的浓度差异影响因素。研究所采用的预测变量包括采样季节、采样地点、摄食习性（通过稳定同位素与脂肪酸组成近似表征）、身体状况指数、禁食状态（以血浆尿素浓度（单位：mmol/L）与肌酐浓度（单位：μmol/L）的比值表示）、年龄（单位：年）以及繁殖状态。数据文件中所有污染物浓度的单位均为ng/g湿重，但在已发表的研究中，除羟基多氯联苯（OH-PCBs）外，其余污染物浓度均经过脂质校正（校正公式为：浓度/脂肪百分比×100）。研究对红细胞中的碳、氮稳定同位素（d¹³C与d¹⁵N）进行了分析，结果以千分比（‰）为单位呈现。脂肪组织中的脂肪酸组成已完成测定，结果以百分比（%）为单位呈现。繁殖状态分为三类：单独捕获的雌性个体（标注为no）、带有当年新生幼崽的雌性个体（标注为coy），以及带有1至2岁后代的雌性个体（标注为yrl）。