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RECORD NUMBER: 466 OF 1580

OLS Field Name OLS Field Data
Main Title Effects of Temperature and Salinity on 'Menidia beryllina' Embryos Exposed to Terbufos.
Author Hemmer, M. J. ; Middaugh, D. P. ; Moore, J. C. ;
CORP Author Environmental Research Lab., Gulf Breeze, FL.
Publisher c1990
Year Published 1990
Report Number EPA/600/J-90/375 ;CONTRIB-667;
Stock Number PB91-163881
Additional Subjects Temperature ; Salinity ; Embryo ; pH ; Regression analysis ; Multivariate analysis ; Reprints ; Terbufos ; Menidia beryllina ; Dissolved oxygen ; Organophosphorus insecticides
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB91-163881 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/13/1991
Collation 12p
Abstract
Embryos of the inland silverside, Menidia beryllina, were exposed to the organophosphorus pesticide terbufos at nine combinations of temperature (20, 25 and 30 C) and salinity (5, 12.5 and 20 levels of salinity). Nominal exposure concentrations were 12.5, 25, 50 and 100 microgram terbufos/1 with an acetone and seawater control for each temperature/salinity combination. Test durations were temperature dependent and ranged from 5 to 14 days. Endpoints were embryo survival, hatching and percentage of larvae with normal vertebrae. Survival was significantly (alpha = 0.05) lower in tests conducted at 20 C for all salinities. Salinity affected survival only at combinations of 20 levels of salinity and 100 microgram terbufos/1. Both temperature and salinity affected the percentage hatch, with the lowest hatching occuring in 20 C tests, and in tests conducted at 20 levels of salinity. Anomalies in the development of vertebrae occurred across all temperature/salinity combinations.