Hung C L H, Xu Y, Lam J C W, Connell D W, Lam M H W, Nicholson S, Richardson B J, Lam P K S
Centre for Coastal Pollution and Conservation, Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong.
Environ Pollut. 2006 Nov;144(1):190-6. doi: 10.1016/j.envpol.2005.12.028. Epub 2006 Mar 3.
The Indo-Pacific humpback dolphin is considered threatened due to several factors including pollution in Hong Kong and the risks due to consumption of fish tainted with polychlorinated biphenyls (PCBs) and organochlorine pesticides were assessed. Six species of fish Collichthys lucida, Pseudosciaena crocea, Johnius sp., Thryssa sp., Mugil sp. and Trichiurus sp., which comprise the main prey species of humpback dolphins were collected for analyses. Risks due to total PCBs, total TEQs, PCB 118 and the pesticides were assessed with the use of toxicity reference values as the threshold reference benchmarks. The calculated risk quotients (RQs) showed that the risks associated with organochlorines were generally low. The highest RQ was associated with total TEQs suggesting that dioxin-like PCBs may pose the highest risk to the dolphins. The HCHs, total PCBs and heptachlor had comparatively high RQs and thus they should also be the priority organochlorines that would require further investigation.
由于包括香港的污染在内的多种因素，印太驼背豚被认为受到威胁，并且对食用受多氯联苯（PCBs）和有机氯农药污染的鱼类所带来的风险进行了评估。采集了六种鱼类，即中华海鲶、大黄鱼、叫姑鱼属、棱鳀属、鲻属和带鱼属，这些鱼类构成了驼背豚的主要猎物种类，用于分析。使用毒性参考值作为阈值参考基准，评估了总多氯联苯、总毒性当量、多氯联苯118和这些农药所带来的风险。计算得出的风险商（RQs）表明，与有机氯相关的风险总体较低。最高的风险商与总毒性当量相关，这表明类二噁英多氯联苯可能对海豚构成最高风险。六氯环己烷、总多氯联苯和七氯的风险商相对较高，因此它们也应是需要进一步调查的优先有机氯物质。
