Marine Biology

, Volume 134, Issue 1, pp 9–17

Adaptations of wild populations of the estuarine fish Fundulus heteroclitus to persistent environmental contaminants

  • D. Nacci
  • L. Coiro
  • D. Champlin
  • S. Jayaraman
  • R. McKinney
  • T. R. Gleason
  • W. R. Munns Jr.
  • J. L. Specker
  • K. R. Cooper
Article

Abstract

Many aquatic species, including the estuarine fish Fundulus heteroclitus (mummichogs), adapt to local environmental conditions. We conducted studies to evaluate whether highly exposed populations of mummichogs adapt to toxic environmental contaminants. These fish populations are indigenous to an urban estuary contaminated with persistent and bioaccumulative contaminants (dioxin-like compounds, or DLCs) that are particularly toxic to the early development of fish. We conducted laboratory challenge experiments to compare mummichog embryos and larvae from reference sites and this highly contaminated site [New Bedford Harbor (NBH), Massachusetts, USA] for their sensitivity to DLCs. While there was variation in DLC-responsiveness within each group, fish from NBH were profoundly less sensitive to DLCs than reference fish. Specifically, concentrations of DLCs similar to those measured in NBH-collected mummichog eggs were lethal to reference embryos. Further, DLC-responsiveness was inherited and independent of maternal contaminant contributions. These findings are consistent with the conclusion that DLC contamination in NBH has contributed to the selection of fish that are resistant to the short-term toxic effects of these environmental-contaminant exposures. This adaptation may be a critical mechanism by which fish populations persist in this highly contaminated site. Further evaluation of this ecosystem may provide important information concerning the direct and indirect consequences of this “unnatural” selection.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • D. Nacci
    • 1
  • L. Coiro
    • 1
  • D. Champlin
    • 1
  • S. Jayaraman
    • 1
  • R. McKinney
    • 1
  • T. R. Gleason
    • 1
  • W. R. Munns Jr.
    • 1
  • J. L. Specker
    • 2
  • K. R. Cooper
    • 3
  1. 1.USA Environmental Protection Agency, National Health and Environmental Effects Research Laboratory, Atlantic Ecology Division, 27 Tarzwell Drive, Narragansett, Rhode Island 02882, USA Fax: 001 (0)401 782 3030 e-mail: nacci.diane@epamail.epa.govIS
  2. 2.University of Rhode Island, Graduate School of Oceanography, Narragansett, Rhode Island 02992, USAIS
  3. 3.Rutgers University, New Brunswick, New Jersey 0890, USAUS

Personalised recommendations