Abstract：
:The accumulation of 14C-benzo(a)pyrene (BaP) sorbed to sediment was examined in fathead minnows (Pimephales promelas) to compare uptake from sediment with a high organic carbon (OC) content (7.7%), to that with a low OC content (2%). Ingestion of sediments was quantified by co-labeling the sediment with 141Cerium, which was not assimilated by the fish. Results of this study indicated that (1) significantly greater quantities of BaP were dissolved in water over low-OC sediment, compared to water over high-OC sediment, (2) fish disturbed the sediment and increased the concentration of BaP in centrifuged (particle-free) water, (3) fish ingested significantly more of the low-OC sediment than high-OC sediment, perhaps in response to the lower food quality of the low-OC sediment, and (4) uptake of BaP from sediment ingestion contributed <3% of the total flux of BaP into the fish. Primarily as a result of the greater concentration of BaP in water, fish from the low-OC exposures had significantly higher rates of BaP accumulation. However, after 48 h the body burdens in these fish declined by 50%, likely due to the induction of MFO enzymes in response to accumulation of BaP. A smaller effect was apparent in the fish from the high-OC exposures, consistent with the lower dose of BaP they experienced. These results illustrate the complex, and sometime counterintuitive, interactions that affect the uptake and bioaccumulation of sediment-associated contaminants.
journal_name
Arch Environ Contam Toxicoljournal_title
Archives of environmental contamination and toxicologyauthors
McCarthy JF,Burrus LW,Tolbert VRdoi
10.1007/s00244-003-2148-0subject
Has Abstractpub_date
2003-10-01 00:00:00pages
364-70issue
3eissn
0090-4341issn
1432-0703journal_volume
45pub_type
杂志文章abstract：:Neonates from CD-1 mice, which were treated during gestation with 100 mg/kg of 2,4,5-T, were studied from day 1 to 30 postpartum (pp) for effects on cardiac development by determining total cardiac activities and isozyme profiles of LDH and CK. On day 1pp, the total activities and isozyme profiles of LDH of the neonat...
journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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更新日期：2001-11-01 00:00:00
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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journal_title：Archives of environmental contamination and toxicology
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pub_type： 杂志文章
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journal_title：Archives of environmental contamination and toxicology
pub_type： 杂志文章
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journal_title：Archives of environmental contamination and toxicology
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