Uptake of benzo(a)pyrene in gizzard shad: The relative roles of water ventilation and sediment ingestion
- Miami Univ., Oxford, OH (United States). Dept. of Zoology
- National Biological Station, Columbia, MO (United States). National Biological Station
The objective of this study was to determine whether sediment ingestion or water ventilation was the primary route of uptake of benzo(a)pyrene (BaP) into the tissues of the detritivorous fish, gizzard shad (Dorosoma cepedianum). Two experiments were conducted in which fish were exposed to sediments spiked with 1 {micro}g/g BaP. In the first experiment, fish were prevented from feeding on the sediment by surgical ligation of the esophagus. Water flow in the tank exceeded 12 turnovers per day, and there was no detectable concentration of BaP in the fish after 22 days of exposure. The second experiment duplicated the first, with the exception that 20 nonligated fish were added to the aquaria along with 20 ligated fish, and the semipermeable membrane devices were used to quantify the bioavailability of BaP. The nonligated fish roiled the water as they fed, forcing the ligated fish to ventilate turbid water. Fish were collected 4, 8, 15 and 22 days after initiation of the experiment. Fourteen of the twenty nonligated fish had detectable levels of BaP in their tissues. In these fish, concentrations of BaP exceeded 0.01 {micro}g/g after 4 days of exposure, but did not significantly change for the remainder of the experiment. Only three of the ligated fish had detectable concentrations of BaP in their tissues. Sediment ingestion appears to be the primary route of entry of BaP into gizzard shad, while ventilation appears to be a minor route of entry even when the fish ventilate turbid water.
- OSTI ID:
- 398221
- Report Number(s):
- CONF-9511137-; ISBN 1-880611-03-1; TRN: IM9649%%429
- 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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