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Main Title Acute Toxicity of 4-Nitrophenol, 2,4-Dinitrophenol, Terbufos and Trichlorfon to Grass Shrimp ('Palaemonetes' spp.) and Sheepshead Minnows ('Cyprinodon variegatus') as Affected by Salinity and Temperature.
Author Brecken-Folse, J. A. ; Mayer, F. L. ; Pedigo, L. E. ; Marking., L. L. ;
CORP Author Environmental Research Lab., Gulf Breeze, FL. ;National Fisheries Research Center, La Crosse, WI. ;Florida State Dept. of Health and Rehabilitative Services, Krawfordville.
Publisher c1994
Year Published 1994
Report Number EPA/600/J-94/126;
Stock Number PB94-158730
Additional Subjects Water pollution effects(Animals) ; Nitrophenols ; Trichlorfon ; Toxicity ; Temperature ; Salinity ; Reprint ; Terbufos ; Pala emonetes ; Cyprinodon variegatus
Library Call Number Additional Info Location Last
NTIS  PB94-158730 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 13p
Toxicities of 2 industrial chemicals (4-nitrophenol and 2,4-dinitrophenol) and two organophosphate insecticides (terbufos and trichlorfon) to juvenile grass shrimp (Palaemonetes spp.) and sheepshead minnows (Cyprinodon variegatus) were determined by static, 96-h toxicity tests in a factorial design with 12 combinations of salinity and temperature (15, 20, 25, 30 ppt x 17.22 72C). Concentrations of the toxicants, including bioconcentration, were determined as appropriate by gas or liquid chromatography and the use of (14)C-labled compounds. The 96-h LC50s for 4-nitrophenol ranged from 12 to 31 mg/L and for 2,4-dinitrophenol from 13 to 50 mg/L. Toxicity decreased as salinity increased for 2,4-dinitrophenol and sheepshead minnows, but toxicity to grass shrimp increased as salinity increased. Toxicity decreased with increased temperature for grass shrimp exposed to 2,4-dinitrophenol and sheepshead minnows exposed to 4-nitrophenol, and no change was observed for grass shrimp exposed to 4-nitrophenol. Bioconcentration increased as concentration increased. The 96-h LC50s for terbufos ranged from 3.4 to 6.6 micrograms/L and for trichlorfon, from 6.3 to 19,300 micrograms/L. Terbofus and trichlorfon toxicity to grass shrimp and sheepshead minnows increased with increased temperature. Bioconcentration factors for terbufos were greater in sheepshead minnows than grass shrimp, but were reversed for trichlorfon.