Feeding selectivity and assimilation of PAH and PCB in Diporeia spp

Journal Article · Thu Sep 01 04:00:00 EDT 1994 · Environmental Toxicology and Chemistry; (United States)

DOI:https://doi.org/10.1002/etc.5620130908· OSTI ID:7010058

Harkey, G A ^[1]; Lydy, M J ^[2]; Kukkonen, J ^[3]; Landrum, P F ^[4]

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1. Great Lakes Environmental Research Lab., Ann Arbor, MI (United States) Clemson Univ., Pendleton, SC (United States). Inst. of Wildlife and Environmental Toxicology
2. Geological Survey, Indianapolis, IN (United States). Water Resources Div.
3. Univ. of Joensuu (Finland). Dept. of Biology
4. Great Lakes Environmental Research lab., Ann Arbor, MI (United States)

A series of experiments were conducted to estimate assimilation efficiencies of two hydrophobic organic contaminants and the influence of particle sizes on the selective sediment ingester, Diporeia spp. Florissant soil was divided into particle-size fractions consisting of 0 to 63 [mu]m, 0 t 20 [mu]m, and 20 to 63 [mu]m and dosed with radiolabeled 2,2[prime],4,4[prime],5,5[prime]-hexachlorobiphenyl (HCBP) and/or benzo[a]pyrene (BaP) to which animals were exposed for individual assays. At the end of timed exposure intervals, individual Diporeia and any fecal pellets they produced were removed from the sediment and analyzed for contaminant content. Assimilation efficiency was estimated via a selectivity index based on organic carbon. Assimilation efficiency of BaP was comparable to previous studies. However, HCBP did not correlate with organic carbon over a range of particle sizes. Accumulation of both contaminants was greatest when animals were exposed to the 20- to 63-[mu]m size fraction, suggesting that Diporeia selectively fed within this particle-size range. Accumulation of HCBP was consistently greater than BaP in all dual-labeled assays, suggesting a greater bioavailability of the PCB to Diporeia. Sediment analysis indicated that BaP and HCBP were associated with different particle-size fractions possessing different amounts of organic carbon, with BaP having the greater tendency to associate with TOC.

• OSTI ID: 7010058
• Journal Information: Environmental Toxicology and Chemistry; (United States), Journal Name: Environmental Toxicology and Chemistry; (United States) Vol. 13:9; ISSN ETOCDK; ISSN 0730-7268
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
560300 -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMALS
AQUATIC ORGANISMS
AROMATICS
ARTHROPODS
BIOLOGICAL ACCUMULATION
CHLORINATED AROMATIC HYDROCARBONS
CONTAMINATION
CRUSTACEANS
HALOGENATED AROMATIC HYDROCARBONS
HYDROCARBONS
INVERTEBRATES
METABOLISM
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
POLLUTION
POLYCHLORINATED BIPHENYLS
POLYCYCLIC AROMATIC HYDROCARBONS
SEDIMENTS
SENSITIVITY
WATER POLLUTION