Fine-Scale Spatial Variation of Persistent Organic Pollutants in Bottlenose Dolphins (Tursiops truncatus) in Biscayne Bay, Florida

详细信息    查看全文

• 作者：Jenny A. Litz ; Lance P. Garrison ; Lynne A. Fieber ; Anthony Martinez ; Joseph P. Contillo ; John R. Kucklick
• 刊名：Environmental Science & Technology
• 出版年：2007
• 出版时间：November 1, 2007
• 年：2007
• 卷：41
• 期：21
• 页码：7222 - 7228
• 全文大小：199K
• 年卷期：v.41,no.21(November 1, 2007)
• ISSN：1520-5851

文摘

Bottlenose dolphins (Tursiops truncatus) are long-termresidents and apex predators in southeast U.S. estuariesand are vulnerable to bioaccumulation of persistent organicpollutants (POPs). Dart biopsy samples were collectedfrom 45 dolphins in Biscayne Bay (Miami, FL), 34 of whichwere matched using fin markings to a photo identificationcatalogue. Blubber samples were analyzed for 73polychlorinated biphenyl (PCB) congeners, six polybrominateddiphenyl ether (PBDE) congeners, and organochlorinepesticides including dichloro-diphenyl-trichloroethane (DDT)and metabolites, chlordanes, and dieldrin. Total PCBs(73PCBs) were present in the highest concentrations andwere 5 times higher in males with sighting histories inthe northern, metropolitan area of Biscayne Bay than maleswith sighting histories in the southern, more rural area[geometric mean: 43.3 (95% confidence interval: 28.0-66.9) vs 8.6 (6.3-11.9) g/g wet mass, respectively].All compound classes had higher concentrations in northernanimals than southern. The differences in POP concentrations found on this small geographic scale demonstrate thatdifferential habitat use can strongly influence pollutantconcentrations and should be considered when interpretingbottlenose dolphin POP data. The PCB concentrations innorthern Bay dolphins are high as compared to other studiesof estuarine dolphins and may place these animals atrisk of reproductive failure and decreased immune function.