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The role of water ventilation and sediment ingestion on the uptake of hexachlorobenzene by gizzard shad ( Dorosoma cepedianum )
Author(s) -
Kolok Alan S.,
Groetsch Kory J.,
Oris James T.
Publication year - 1996
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620151016
Subject(s) - dorosoma , gizzard shad , ingestion , hexachlorobenzene , lepomis , forage fish , fish <actinopterygii> , chemistry , fishery , biology , ecology , pesticide , biochemistry
The objective of this study was to determine whether sediment ingestion or water ventilation was the primary route for uptake of hexachlorobenzene (HCB) in the detritivorous fish, gizzard shad ( Dorosoma cepedianum ). Twenty nonligated and 30 esophagus‐ligated fish were exposed to sediments spiked with 1 μg/g HCB for 29 d. The nonligated fish roiled the water as they fed, forcing the ligated fish to ventilate turbid water. Fish were collected 7, 14, 22, and 29 d after initiation of the experiment. Detectable levels of HCB were found in all ligated and nonligated fish, although the concentration of HCB in the ligated fish only ranged from 14 to 33% of that found in the nonligated fish. Thus, ingestion of contaminated sediments is a significant source of HCB for gizzard shad.