Ecological risks of dioxin and PCBs to fish populations: A modeling assessment

Conference · Sat Dec 31 04:00:00 EST 1994

OSTI ID:49542

Munns, Jr, W R ^[1]; Black, D ^[2]

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1. Science Applications International Corp., Narragansett, RI (United States)
2. Environmental Protection Agency, Narragansett, RI (United States)

The US Environmental Protection Agency is reevaluating ecological risks associated with 2,3,7,8-tetrachlorodibenzo-p-dioxin and similar chemicals using biologically based exposure-response models. As part of this reevaluation, dioxin and PCB effects on reproductive and other demographic characteristics of the mummichog (Fundulus heteroclitus) were quantified by EPA`s Environmental Research Laboratory in Narragansett, RI. Data from laboratory studies of dietary exposure to dioxin and from surveys of populations collected from a heavily PCB-contaminated harbor located in the northeast United States were used to parameterize stage-classified population projection models. Exposure-response models were then developed to relate population growth effects to exposure concentration for use in risk quantification exercises. The population models were also used to evaluate the sensitivity of mummichog population dynamics to changes in demographic rates to identify appropriate toxicity test endpoints. This work provides ecological relevant information concerning the potential risks of chlorinated compounds to estuarine fish populations.

• OSTI ID: 49542
• Report Number(s): CONF-9410273--
• Country of Publication: United States
• Language: English

Related Subjects

56 BIOLOGY AND MEDICINE
APPLIED STUDIES
DIOXIN
DOSE-RESPONSE RELATIONSHIPS
FISHES
FORECASTING
MATHEMATICAL MODELS
POLYCHLORINATED BIPHENYLS
POPULATION DYNAMICS
RISK ASSESSMENT
SENSITIVITY
TOXICITY
WATER POLLUTION