title: Fish tissue quality in near-coastal areas of the Gulf of Mexico receiving point source discharges.
abstract: The objective of this study was to determine inorganic and organic contaminant concentrations in edible tissue of fish collected from eight coastal areas receiving wastewater discharges and from two reference locations. Trace metal residues were statistically similar regardless of the collection site. Zinc (100% detection in all samples), total mercury (100%), total arsenic (92%), copper (92%), and selenium (88%) were the more commonly detected trace metals. Mercury concentrations exceeded the Florida health-based standard of 0.5 microg/g for limited fish consumption in 30% of the total samples and averaged 0.40 (+/- 1 S.D. = 0.22, range < or = 0.08 to 0.85) microg/g wet weight. The average total PAH concentrations were 1.79 (+/- 1.60) ng/g (reference areas) and 2.17 (+/- 3.29) ng/g (wastewater-impacted areas). Pyrene was detected most frequently (63% of the total samples) and averaged 0.74 (+/- 0.35) ng/g wet wt. The average total PCB concentrations were 4.8 (+/- 7.1) ng/g (reference areas) and 31.6 (+/- 31.3) ng/g (wastewater-impacted areas) Concentrations of dieldrin and cis-chlordane were approximately eight times greater, respectively, in fish collected from wastewater receiving waters, whereas total DDT and total pesticide concentrations were not elevated in the same areas. Concentrations of total PCBs and all chlorinated pesticides were below US health-based standards. The lack of a published reference data base for fish tissue quality in near-coastal areas of the Gulf of Mexico restricts an assessment of the environmental significance of results from this and similar studies investigating the fate of point source contaminants.
authors.affiliation: United States Environmental Protection Agency, ORD, NHEERL, Gulf Breeze, FL 32561, USA. lewis.michael@epa.gov
authors.forename: Michael A
authors.initials: MA
authors.lastname: Lewi
authors.forename: Geoff I
authors.initials: GI
authors.lastname: Scott
authors.forename: Dan W
authors.initials: DW
authors.lastname: Bearden
authors.forename: Robert L
authors.initials: RL
authors.lastname: Quarles
authors.forename: James
authors.initials: J
authors.lastname: Moore
authors.forename: Erich D
authors.initials: ED
authors.lastname: Strozier
authors.forename: Scott K
authors.initials: SK
authors.lastname: Sivertsen
authors.forename: Aaron R
authors.initials: AR
authors.lastname: Dias
authors.forename: Marion
authors.initials: M
authors.lastname: Sanders
mesh_terms: D000818:Animals; D003634:DDT / Q000032:analysis*; D004781:Environmental Exposure; D005399:Fishes; D007306:Insecticides / Q000032:analysis*; D019216:Metals, Heavy / Q000032:analysis*; D008800:Mexico; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*; D014018:Tissue Distribution; D014481:United States; D014865:Waste Disposal, Fluid; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D007306:Insecticides; D019216:Metals, Heavy; D011084:Polycyclic Aromatic Hydrocarbons; D014874:Water Pollutants, Chemical; D003634:DDT