Record Display for the EPA National Library Catalog


Main Title Toxic effects of zinc on fathead minnows Pimephales promelas in soft water /
Author Benoit, Duane A. ; Holcombe., G. W.
CORP Author Environmental Research Lab.-Duluth, MN.
Publisher [Academic Press],
Year Published 1978
Report Number EPA/600/J-78/106
Stock Number PB-295 382
Subjects Zinc--Physiological effect ; Minnows--Effect of water pollution on ; Zinc--adverse effects ; Cyprinidae--physiology ; Minnows--physiology
Additional Subjects Minnows ; Fishes ; Zinc ; Metals ; Concentration(Composition) ; Physiological effects ; Eggs ; Survival ; Reproduction(Biology) ; Larvae ; Exposure ; Sensitivity ; Life cycles ; Growth ; Water pollution ; Fresh water fishes ; Fathead minnows ; Heavy metals ; Pimephales promelas ; Toxic substances ; Water pollution effects(Animals) ; Bioindicators
Library Call Number Additional Info Location Last
NTIS  PB-295 382 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 701-708 pages ; 28 cm.
A fathead minnow life-cycle exposure to various zinc concentrations demonstrated that the most sensitive indicators of zinc toxicity were egg adhesiveness and fragility, which were significantly affected at 145 micrograms Zn per liter and above, but were not affected at 78 micrograms Zn per liter and below. These effects occurred shortly after the eggs were spawned (during water hardening) and therefore were not related to effects on the parental fish. Hatchability and survival of larvae were significantly reduced, and deformities at hatching were significantly increased at 295 micrograms Zn per liter and above. Acclimated and unacclimated groups of larvae exposed to identical zinc concentrations for 8 weeks after hatch showed only slight differences in sensitivity.