A preliminary risk assessment of organochlorines accumulated in fish to the Indo-Pacific humpback dolphin (Sousa chinensis) in the Northwestern waters of Hong Kong

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

23 Scopus Citations
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Author(s)

  • C. L H Hung
  • Y. Xu
  • J. C W Lam
  • D. W. Connell
  • M. H W Lam
  • And 3 others
  • S. Nicholson
  • B. J. Richardson
  • P. K S Lam

Detail(s)

Original languageEnglish
Pages (from-to)190-196
Journal / PublicationEnvironmental Pollution
Volume144
Issue number1
Publication statusPublished - Nov 2006

Abstract

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. © 2006 Elsevier Ltd. All rights reserved.

Research Area(s)

  • Fish prey species, Indo-Pacific humpback dolphin, Polychlorinated biphenyls, Risk assessment, Toxicity equivalencies

Citation Format(s)

A preliminary risk assessment of organochlorines accumulated in fish to the Indo-Pacific humpback dolphin (Sousa chinensis) in the Northwestern waters of Hong Kong. / Hung, C. L H; Xu, Y.; Lam, J. C W et al.
In: Environmental Pollution, Vol. 144, No. 1, 11.2006, p. 190-196.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review