Article

Archives of Environmental Contamination and Toxicology

, Volume 47, Issue 1, pp 126-140

Contaminant Exposure and Reproductive Success of Ospreys (Pandion haliaetus) Nesting in Chesapeake Bay Regions of Concern

  • B. A. RattnerAffiliated withU.S. Geological Survey, Patuxent Wildlife Research Center, 12011 Beech Forest Road, Laurel, MD 20708
  • , P. C. McGowanAffiliated withU.S. Fish and Wildlife Service, Chesapeake Bay Field Office, Annapolis, MD 21401
  • , N. H. GoldenAffiliated withU.S. Geological Survey, Patuxent Wildlife Research Center, 12011 Beech Forest Road, Laurel, MD 20708
  • , J. S. HatfieldAffiliated withU.S. Geological Survey, Patuxent Wildlife Research Center, 12011 Beech Forest Road, Laurel, MD 20708
  • , P. C. ToschikAffiliated withMarine-Estuarine-Environmental Science Program and Department of Animal and Avian Sciences, University of Maryland, College Park, MD 20742
  • , R. F. LukeiJrAffiliated withCenter for Conservation Biology, College of William and Mary, Williamsburg, VA 23187
  • , R. C. HaleAffiliated withVirginia Institute of Marine Science, Gloucester Point, VA 23062
  • , I. Schmitz-AfonsoAffiliated withU.S. Department of Agriculture, Agriculture Research Service, Beltsville, MD 20705
  • , C. P. RiceAffiliated withU.S. Department of Agriculture, Agriculture Research Service, Beltsville, MD 20705

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Abstract

Abstract:

The Chesapeake Bay osprey population has more than doubled in size since restrictions were placed on the production and use of DDT and other toxic organochlorine contaminants in the 1970s. Ospreys are now nesting in the most highly polluted portions of the Bay. In 2000 and 2001, contaminant exposure and reproduction were monitored in ospreys nesting in regions of concern, including Baltimore Harbor and the Patapsco River, the Anacostia and middle Potomac rivers, and the Elizabeth River, and a presumed reference site consisting of the South, West, and Rhode rivers. A “sample egg” from each study nest was collected for contaminant analysis, and the fate of eggs remaining in each nest (n = 14–16/site) was monitored at 7- to 10-day intervals from egg incubation through fledging of young. Ospreys fledged young in regions of concern (observed success: 0.88–1.53 fledglings/active nest), although productivity was marginal for sustaining local populations in Baltimore Harbor and the Patapsco River and in the Anacostia and middle Potomac rivers. Concentrations of p,p′-DDE and many other organochlorine pesticides or metabolites, total PCBs, some arylhydrocarbon receptor-active PCB congeners and polybrominated diphenyl ether congeners, and perfluorooctanesulfonate were often greater in sample eggs from regions of concern compared to the reference site. Nonetheless, logistic regression analyses did not provide evidence linking marginal productivity to p,p′-DDE, total PCBs, or arylhydrocarbon receptor-active PCB congener exposure in regions of concern. In view of the moderate concentrations of total PCBs in eggs from the reference site, concerns related to new and emerging toxicants, and the absence of ecotoxicological data for terrestrial vertebrates in many Bay tributaries, a more thorough spatial evaluation of contaminant exposure in ospreys throughout the Chesapeake may be warranted.