title: Response spectrum of pentachlorobenzene and fluoranthene for Chironomus tentans and Hyalella azteca.
abstract: The whole-body residues of pentachlorobenzene (PCBz) and fluoranthene (FLU) in Hyalella azteca and Chironomus tentans were determined for a variety of chronic sublethal effects. The endpoints evaluated for H. azteca included 28-d growth and survival and 42-d growth, survival, and reproduction. Adverse effects to C. tentans also were determined at multiple endpoints including 10-d growth, cumulative pupation and emergence, and reproduction. The lowest-observed-effect residue (LOER) based on whole-body residues associated with growth was consistent between compounds and species tested with concentrations ranging from 0.17 to 0.33 micromol/g. For H. azteca, the most sensitive endpoints were growth at 0.23 micromol/g and reproduction at 0.11 micromol/g for PCBz and FLU, respectively. For C. tentans, the most sensitive endpoints were emergence, development and reproduction at 0.02 micromol/g, and development and reproduction at 0.15 micromol/g for PCBz and FLU, respectively. Compared to residues associated with acute lethality, the most sensitive sublethal endpoints were approximately 4 and 60 times lower for PCBz and FLU, respectively. The relative consistency of the sublethal endpoints suggests that body residues can be a valuable tool to evaluate bioaccumulation data as part of a risk assessment to predict adverse effects to biota.
authors.affiliation: Fisheries and Illinois Aquaculture Center and Department of Zoology, Southern Illinois University at Carbondale, Carbondale, Illinois 62901-6511, USA.
authors.forename: Lance J
authors.initials: LJ
authors.lastname: Schuler
authors.forename: Peter F
authors.initials: PF
authors.lastname: Landrum
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Lydy
mesh_terms: D000818:Animals; D001822:Body Burden; D002683:Chironomidae / Q000187:drug effects* / Q000254:growth & development / Q000502:physiology; D002722:Chlorobenzenes / Q000493:pharmacokinetics / Q000633:toxicity*; D005449:Fluorenes / Q000493:pharmacokinetics / Q000633:toxicity*; D008018:Life Cycle Stages; D011161:Porifera / Q000187:drug effects* / Q000254:growth & development / Q000502:physiology; D014874:Water Pollutants, Chemical / Q000493:pharmacokinetics / Q000633:toxicity*
chemical_list: D002722:Chlorobenzenes; D005449:Fluorenes; D014874:Water Pollutants, Chemical; C007738:fluoranthene; C003060:pentachlorobenzene