Bioaccumulation of PCBs in young-of-the-year striped bass: A nine month time series
- State Univ. of New York, Stony Brook, NY (United States). Marine Sciences Research Center
- Manhattan Coll., Riverdale, NY (United States)
The purpose of this study was to determine uptake of PCBs in rapidly growing young-of-the-year (YOY) striped bass (Morone saxatilis) in the Hudson River Estuary and to compare the data to predictions from both steady-state and time-dependent food-chain bioaccumulation modeling. Striped bass in the Hudson are spawned in freshwater, enter the upper estuary in early summer, and overwinter in the lower estuary. The authors have determined that their PCB exposure in water varies little over this time. Striped bass life history, prey composition, and bioenergetics have been determined in prior or ongoing projects. High and relatively uniform PCB water concentrations (10--28 ng/L) in the Hudson Estuary make it an excellent model ecosystem to study PCB bioaccumulation. YOY fish were collected at approximately one month intervals from the upper Hudson River Estuary on ten dates beginning on July 1, 1994 (average wet of 0.3 g) and ending on April 4, 1995 (wet weights of 100--150 g). Striped bass and zooplankton prey (determined by gut contents) were analyzed for PCBs and lipids. PCB concentrations generally increased over the first three months with a stronger time dependence for more highly chlorinated homologues. Lipid-based PCB concentrations decreased in the late fall, likely due to a seasonal increase in storage lipids, Consistent with steady-state food-chain model predictions, bioaccumulation factors (BAFs) were highly correlated with K{sub ow} and lipid-based BAFs were above those estimated by lipid-based equilibrium with water. In the presentation they discuss the results of fully time-dependent BAF calculations and will show how the implications of steady-stale assumptions on bioaccumulation modeling become apparent when considering rapidly growing organisms like YOY striped bass.
- OSTI ID:
- 398214
- Report Number(s):
- CONF-9511137-; ISBN 1-880611-03-1; TRN: IM9649%%422
- Resource Relation:
- Conference: 2. Society of Environmental Toxicology and Chemistry (SETAC) world conference, Vancouver (Canada), 5-9 Nov 1995; Other Information: PBD: 1995; Related Information: Is Part Of Second SETAC world congress (16. annual meeting): Abstract book. Global environmental protection: Science, politics, and common sense; PB: 378 p.
- Country of Publication:
- United States
- Language:
- English
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