PMID: 9646525Jul 1, 1998Paper

Trace metal pollution in Hong Kong: implications for the health of Hong Kong's Indo-Pacific hump-backed dolphins (Sousa chinensis)

The Science of the Total Environment
E C Parsons

Abstract

The territorial waters of Hong Kong are highly contaminated with anthropogenic pollutants, including trace metals. Hong Kong's population of Indo-Pacific hump-backed dolphins (Sousa chinensis) inhabits an area where a high volume of sewage waste discharge and the close proximity of contaminated mud pits mean a considerable potential for trace metal contamination. Trace metal concentrations in the muscle tissue of fish caught from areas of high dolphin abundance are notable. However, in order to gauge the amount of trace metal consumed by dolphins, whole fish must be analysed. Whole fish from areas of high dolphin abundance have considerably higher trace metal loads than muscle tissue alone. Considering the consumption of prey items by dolphins, a daily intake of trace metals was estimated as As, 410-518; Cd, 34-44; Co, 4-5; Cr, 40-50; Cu, 44-56; Hg, 51-66; Mo, 22-27; Ni, 19-24; Pb, 320-403; Se, 99-125 and Zn, 388-490 (microgram kg-1 body wt. per day). Concentrations of arsenic, chromium, lead, molybdenum and nickel in dolphin tissues were an order of magnitude lower than in prey items, suggesting these elements may be excreted by this species. Mercury concentrations in dolphin tissues were, however, an order of magnitude higher...Continue Reading

Citations

Feb 6, 2002·Marine Pollution Bulletin·B Morton, G Blackmore
Feb 5, 2002·Marine Environmental Research·Takashi KunitoShinsuke Tanabe
Jul 17, 2012·Journal of Environmental Monitoring : JEM·Antonio BellanteSalvatore Mazzola
Aug 30, 2008·Journal of Genetics and Genomics = Yi Chuan Xue Bao·Hongshan ChenYuping Wu
Nov 15, 2001·Environmental Pollution·R KubotaS Tanabe
Aug 31, 2021·Environmental Pollution·Jiashen TianWenhua Liu

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