Abstract

The OCP and PCB contents in the tissues of beluga whales (Delphinapterus leucas) from the Russian Arctic have been studied for the first time. Skin and subcutaneous adipose tissue samples collected in the White, Kara, and Bering seas in 2012–2017 were analyzed for the animals of different age and sex (n = 22). 4,4'-DDE dominated among the OCPs analyzed; the main PCB congeners were PCB-138+PCB-158 and PCB-153 + PCB-168, which was also typical of other Arctic marine mammals. The highest concentrations and widest range of these compounds were found in beluga whales from the White Sea (4,4'-DDE: 3778.3 ± 4856.3 ng/g lipids; ranging as 33.2–16 007.8 ng/g lipids; PCB-138 + PCB-158: 1270.1 ± 1528.8 ng/g lipids; ranging as 127.6–4957.4 ng/g lipids; PCB-153 + PCB-168: 1144.1 ± 1230.2 ng/g lipids; ranging as 113.0–4515.2 ng/g lipids). The lowest concentration was found in the beluga whales from the Anadyr estuary of the Bering sea (4,4'-DDE: 1003.3 ± 1422.1 ng/g lipids; ranging as 186.0–3125.0 ng/g lipids; PCB-138 + PCB-158: 95.0 ± 99.2 ng/g lipids; ranging as 29.9–242.1 ng/g lipids; PCB-153 + PCB-168: 114.8 ± 118.8 ng/g lipids; ranging as 35.4–290.9 ng/g lipids). The biological parameters of the sampled animals, the features of PCB and OCP transport pathways, as well as regional environmental pollution, were considered the main reasons for the observed geographical variability of pollutant concentrations in beluga whales.

中文翻译：

---

白海，卡拉海和白令海白鲸的皮下脂肪组织中的有机氯农药和多氯联苯

摘要

在白鲸的组织（OCP的和PCB内容学名Delphinapterus leucas从俄罗斯北极地区）进行了研究首次。对2012-2017年在白海，卡拉海和白令海收集的皮肤和皮下脂肪组织样本进行了分析，以分析不同年龄和性别的动物（n= 22）。在分析的OCP中，以4,4'-DDE为主；PCB的主要同源物是PCB-138 + PCB-158和PCB-153 + PCB-168，这也是其他北极海洋哺乳动物的典型特征。在白海的白鲸中发现了这些化合物的最高浓度和最大范围（4,4'-DDE：3778.3±4856.3 ng / g脂质；范围为33.2–16 007.8 ng / g脂质； PCB-138 + PCB -158：1270.1±1528.8 ng / g脂质；范围为127.6–4957.4 ng / g脂质； PCB-153 + PCB-168：1144.1±1230.2 ng / g脂质；范围为113.0–4515.2 ng / g脂质）。在白令海的阿纳德尔河口的白鲸中发现了最低的浓度（4,4'-DDE：1003.3±1422.1 ng / g脂质；范围为186.0–3125.0 ng / g脂质； PCB-138 + PCB-158 ：95.0±99.2 ng / g脂质；范围为29.9–242.1 ng / g脂质； PCB-153 + PCB-168：114.8±118.8 ng / g脂质；范围为35。4–290.9 ng / g脂质）。采样动物的生物学参数，PCB和OCP传输路径的特征以及区域环境污染被认为是观察到白鲸中污染物浓度地理变化的主要原因。