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POPULATION GENETICS AND TOLERANCE TO DIOXIN-LIKE COMPOUNDS OF A MIGRATORY MARINE FISH (MENIDIA MENIDIA) IN POLYCHLORINATED BIPHENOL-CONTAMINTED AND REFERENCES SITES
Citation:
ROARK, S., M. A. KELBLE, D. E. NACCI, D. M. CHAMPLIN, L. L. COIRO, AND S. I. GUTTMAN. POPULATION GENETICS AND TOLERANCE TO DIOXIN-LIKE COMPOUNDS OF A MIGRATORY MARINE FISH (MENIDIA MENIDIA) IN POLYCHLORINATED BIPHENOL-CONTAMINTED AND REFERENCES SITES. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY. Society of Environmental Toxicology and Chemistry, Pensacola, FL, 24(3):726-732, (2005).
Impact/Purpose:
To evaluate a population of migratory fish for evidence of PCB pollution tolerance and population genetic changes
Description:
We evaluated a population of migratory fish (Menidia menidia) that spawn in New Bedford Harbor (NBH), MA, USA, a U.S. EPA Superfund site with extreme polychlorinated biphenyl (PCB) for evidence of pollution tolerance and population genetic changes. We selected this site because a population resident to NBH of a non-migratory fish species has been shown to have adapted genetically to PCBs. While offspring of M. menidia collected from NBH were significantly less sensitive of embryonic exposure to the dioxin-like PCB congener 3,3',4,4'5-pentachlorobiphenyl (PCB 126) than offspring of M. menidia from a reference site, analysis of ten polymorphic enzymatic loci indicated little genetic differentiation among populations in the study area. Results suggest that regional mixing of M. menidia populations during migration, and the absence of multi-generational exposure at contaminated sites may limit localized adaptation