Record Display for the EPA National Library Catalog


Main Title Effects of Heptachlor and Toxaphene on Laboratory-Reared Embryos and Fry of the Sheepshead Minnow.
Author Goodman, Larry R. ; Hansen, David J. ; Couch, John A. ; Forester, Jerrold ;
CORP Author Environmental Research Lab., Gulf Breeze, FL.
Year Published 1976
Report Number EPA/600/J-76/086 ;CONTRIB-297;
Stock Number PB-290 072
Additional Subjects Pesticides ; Heptachlor ; Insecticides ; Toxicology ; Minnows ; Fishes ; Chlorine organic compounds ; Bioassay ; Camphene ; Concentration(Composition) ; Histology ; Pathology ; Larvae ; Toxaphene ; Methanoindene/heptachloro-tetrahydro ; Toxic substances ; Bioaccumulation ; Cyprinodon variegatus ; Water pollution effects(Animals) ; Histopathology ; Reprints
Library Call Number Additional Info Location Last
NTIS  PB-290 072 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 13p
Flow-through seawater bioassays of 28-days duration were conducted with the organochlorine pesticides heptachlor and toxaphene to determine their toxicity to and bioconcentration by embryos and fry of the sheepshead minnow (Cyprindon variegatus). At technical heptachlor measured concentrations of 4.3, 3.5, 2.2, 2.0, and 1.2 micrograms/l (ppb), test animal survival was 1, 5, 61, 79, and 88%, respectively. At toxaphene measured concentrations of 2.5, 1.1, 0.6, 0.3, and 0.2 micrograms/l, test animal survival was 10, 85, 79, 88, and 80% respectively. Average standard length of fry continuously exposed from fertilization to heptachlor concentrations of 4.3 and 3.5 micrograms/l was significantly reduced. Concentration factors (concentration in fish/measured concentration in water) for heptachlor averaged 3,600 and for transchlordane averaged 8,600. Heptachlor epoxide and cis-chordane were also present in the fish. Concentration factors for toxaphene in fry averaged 9,800. Various histopathological characteristics not seen in control fish were observed in the liver, kidney, pancreas, and intestine of the few fish that survived 4.3 and 3.5 micrograms/l of heptachlor.