Record Display for the EPA National Library Catalog

RECORD NUMBER: 472 OF 2032

OLS Field Name OLS Field Data
Main Title Associations between Physiological Alterations and Population Changes in an Estuarine Mysid during Chronic Exposure to a Pesticide.
Author McKenney, C. L. ;
CORP Author Environmental Research Lab., Gulf Breeze, FL.
Year Published 1985
Report Number EPA/600/D-85/167;
Stock Number PB85-243137
Additional Subjects Pesticides ; Toxicology ; Herbicides ; Exposure ; Survival ; Thiobencarb ; Mysidopsis bahia ; Mysids ; Water pollution effects(Animals)
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB85-243137 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 25p
Abstract
A number of vital life processes of an estuarine mysid (Mysidopsis bahia) were examined throughout its life cycle during exposure to the thiocarbamate herbicide, thiobencarb. Initial exposure of juvenile mysids to thiobencarb resulted in elevated respiration rates. Concentrations of thiobencarb that produced significant reductions in population survival through a complete life cycle (in approximately 24 days) significantly stimulated respiration rates of juveniles after only 4 days of exposure. Increased metabolic demands with sublethal thiobencarb exposure reduced the amount of assimilated energy available for production of new tissue by juvenile mysids, resulting in retarded juvenile growth rates. Higher O:N ratios during the maturation of thiobencarb-exposed mysids suggest a greater reliance on the more energy-rich lipid substrates in order to support the elevated rates of oxidative metabolism, resulting in less lipid material being available for gamete production.