Bioaccumulation of polychlorinated biphenyls and organochlorine pesticides in young-of-the-year bluefish (Pomatomus saltatrix) in the vicinity of a Superfund Site in New Bedford Harbor, Massachusetts, and in the adjacent waters.

摘要: Abstract Spatial gradients of polychlorinated biphenyls (PCBs) and organochlorine pesticides were examined in the young-of-the-year (YOY) bluefish (Pomatomus saltatrix) vicinity a PCB Superfund Site New Bedford Harbor, Massachusetts, adjacent waters. concentrations varied between different locations, also among fish from given location. A generally decreasing gradient was evident as collected away Site. The average sum highest for Upper Harbor Interstate-195 Bridge Coggeshall Street (Upper Harbor), followed by Lower north Popes Island (Lower Outer south Hurricane Barrier (Outer Harbor). levels PCBs Clarks Cove Buzzards Bay similar lowest all specimens analyzed present study. Pesticide about one order magnitude or lower than concentrations, pesticide concentrations. Some commonly detected included DDTs metabolites, heptachlor epoxide, endosulfan sulfate, α-chlordane. Distribution tissues YOY Cove. lipids brain samples numerically greater liver samples, but these differences not statistically significant. hypaxial muscle epaxial although two groups different. Despite higher susceptibility lighter homologs to geophysical biogeochemical weathering processes, relative dominance suggested ongoing recent sources PCBs, particularly Aroclor 1242 1016 this area. presence heavier could be attributed 1252 1254 that being used relatively smaller quantities manufacture electrical components addition 1016. concentration appears increase further Acushnet Estuary collected. Principal component analyses 153 normalized individual congeners resulted general groupings; tight group comprised rather loose more dispersed tissue major close groupings Bay. Pesticides formed group, with some locations populating bluefish. Although have been implicated various behavioral health effects experimental field studies, deleterious chronic exposure high potential recruitment population adult stock remains obscure. Adaptive evolutionary resistance contaminants documented resident species highly contaminated estuaries, however responses investigated migratory like results study provide reference baseline “before-and-after” comparative studies other toxicological is currently remediated.