Record Display for the EPA National Library Catalog

RECORD NUMBER: 479 OF 1580

OLS Field Name OLS Field Data
Main Title Endrin: Effects on the Entire Life Cycle of a Saltwater Fish 'Cyprinodon variegatus'.
Author Hansen, David J. ; Schimmel, Steven C. ; Wilson, Jr., Alfred J. ;
CORP Author Environmental Research Lab., Gulf Breeze, Fla.
Year Published 1977
Report Number EPA/600/J-77/067 ;CONTRIB-333;
Stock Number PB-277 160
Additional Subjects Toxicity ; Minnows ; Endrin ; Insecticides ; Pesticides ; Lethal dosage ; Chemical analysis ; Exposure ; Fishes ; Chlorine organic compounds ; Bioassay ; Concentration(Composition) ; Larvae ; Life cycles ; Aquatic biology ; Survival ; Reproduction(Biology) ; Growth ; Estuaries ; Histology ; Pathology ; Tables(Data) ; Water pollution effects(Animals) ; Reprints ; Cyprinodon variegatus ; Toxic substances ; Dimethanonaphthalenes ; Bioaccumulation ; Pesticide residues
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB-277 160 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 13p
Abstract
The sheepshead minnow (Cyprinodon variegatus) was continuously exposed for 23 wk to the organochlorine insecticide endrin, from the embryonic stage through hatching until adulthood and spawning. The resultant progeny were monitored to determine the effects of the toxicant on their survival, growth, and reproduction. Average measured exposure concentrations were O (control), 0.027, 0.077, 0.12, 0.31, and 0.72 micrograms/liter. Embryos exposed to 0.31 and 0.72 micrograms/liter hatched early; all fry exposed to 0.72 micrograms/liter died by day 9 of exposure. At 0.31 micrograms/liter, fry were initially stunted and some died. Survivors seemed unaffected until maturity, when some females died during spawning; fewer eggs were fertile and survival of exposed progeny decreased. No significant effects were observed throughout this fish's life cycle at an exposure concentration of 0.12 micrograms/liter. Four-week-old juvenile fish accumulated 2,500 times the concentration of endrin in the exposure water; adults, 6,400 times; and their eggs, 5,700 times. The specific application factor (calculated by dividing the limits on the maximum acceptable toxicant concentration, >0.12 and <0.31 micrograms/liter, by the concentration lethal to 50% of the juvenile fish in 96 hr, 0.34 micrograms/liter) ranged from 0.35 to 0.91.