| 徐添翼,唐文乔.2016.长江口两种江豚亚种体脂内多氯联苯同分异构体含量的比较分析.动物学杂志,51(3):337-346. |
| 长江口两种江豚亚种体脂内多氯联苯同分异构体含量的比较分析 |
| Comparative Analysis on Isomer-specific of Polychlorinated Biphenyls in the Dead Bodies of Two Finless Porpoise Subspecies in Yangtze Estuary |
| 投稿时间：2015-07-25 修订日期：2016-02-02 |
| DOI：DOI: 10.13859/j.cjz.201603001 |
| 中文关键词: 长江口 窄脊江豚 多氯联苯 含量评价 |
| 英文关键词:Yangtze River Estuary Finless porpoise(Neophocaena asiaeorientalis) Polychlorinated biphenyls Evaluate |
| 基金项目:渔业种质资源保护项目(316 豚类保护行动)；* 通讯作者,E-mail:wqtang@shou.edu.cn；第一作者介绍徐添翼,男,硕士研究生；研究方向保护生物学；E-mail:xty1992310@163.com。收稿日期： ,修回日期 |
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| 中文摘要: |
| 为了弄清长江口窄脊江豚(Neophocaena asiaeorientalis)体脂内多氯联苯(PCBs)的累积情况,采用气相色谱质谱联用仪(GC-MS)对5头东亚亚种(N. asiaeorientalis sunameri)和3头长江亚种(N. asiaeorientalis asiaeorientalis)的10种多氯联苯同族物含量进行了测定。研究发现,长江口窄脊江豚皮脂中PCBs的平均含量为3.38μg/g(湿重),其中长江亚种的PCBs含量(3.40 ~ 12.67 μg/g)要显著高于东亚亚种(0.33 ~ 2.21μg/g)。在10种PCBs中,一氯、二氯和三氯联苯在所有个体中均未测出(＜0.005μg/g),但四氯、五氯、六氯和七氯联苯在所有个体中都被测出,其中六氯联苯的平均含量高达1.48μg/g,占总含量的43.79%。从含量的组成看,六氯联苯和七氯联苯均构成了长江口窄脊江豚体脂内PCBs的主要成分,但相比东亚亚种,长江亚种的四氯联苯和五氯联苯也占较高的比例。这表明低氯代组分的PCBs可以随水流的稀释和生物转化而逐渐降解,但高氯代组分的PCBs则不易降解,并且随江豚年龄的增长而快速积累,产生更持久的毒性效应。 |
| 英文摘要: |
| The concentration of ten kinds of polychlorinated biphenyls in body fat of five East Asian finless porpoise(Neophocaena asiaeorientalis sunameri) and three Yangtze finless porpoise(Neophocaena asiaeorientalis asiaeorientalis) in Yangtze River Estuary were measured by gas chromatograph-mass spectrometer (GC-MS). The result shows that, the average content of PCBs in Narrow-Ridged finless porpoise in Yangtze River Estuary was 3.38 μg/g, wet weight. The content of PCBs in Yangtze finless porpoise(3.4-12.67μg/g) was significant higher than that in East Asian finless porpoise(0.33-2.21μg/g) (P < 0.05). In these ten kinds of polychlorinated biphenyls, monochlorobiphenyl, dichlorobiphenyl, trichlorobiphenyl were not detected in every individual finless porpoise(＜0.005μg/g),and tetrachlorobiphenyl, pentachlorobiphenyl, hexachlorobiphenyl, heptachlorobiphenyl were all detected in every individual finless porpoise. The average content of hexachlorobiphenyl was 1.48μg/g wet weight, accounting for 43.79% of the total PCBs content. From the composition of PCBs content, the percentage of hexachlorobiphenyl and heptachlorobiphenyl were higher than other chlorinated PCBs in Narrow-Ridged finless porpoise in Yangtze River Estuary. But compared with East Asian finless porpoise, the content of tetrachlorobiphenyl and pentachlorobiphenyl in Yangtze finless porpoise also account for high proportion. This suggests that low chlorinated component of PCBs can be degraded with water dilution and biological transformation, but high chlorinated component of PCBs is not easy to degrade. With the growth of finless porpoise age, high chlorinated component of PCBs in finless porpoise accumulate fast, it will have a more lasting toxicity effect. |
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