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RECORD NUMBER: 11 OF 26

OLS Field Name OLS Field Data
Main Title Changes in the Physiological Performance and Energy Metabolism of an Estuarine Mysid 'Mysidopsis bahia' Exposed in the Laboratory through a Complete Life Cycle to the Defoliant DEF.
Author McKenney, C. L. ; Hamaker, T. L. ; Matthews., E. ;
CORP Author Environmental Research Lab., Gulf Breeze, FL.
Publisher c1991
Year Published 1991
Report Number EPA/600/J-91/333;
Stock Number PB92-129709
Additional Subjects Animal physiology ; Water pollution effects(Animals) ; DEF-6 pesticide ; Defoliants ; Energy metabolism ; Zooplankton ; Life cycles ; Phosphorotrithioic acid/(tributyl-ester) ; Phosphorus organic compounds ; Toxic substances ; Lipids ; Marine biology ; Estuarines ; Oxygen ; Nitrogen ; Concentration(Composition) ; Exposure ; Toxicity ; Reprints ; Mysidopsis bahia
Holdings
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Status
NTIS  PB92-129709 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 08/28/1992
Collation 15p
Abstract
Measures of physiological performance and energy metabolism were made on an estuarine mysid (Mysidopsis bahia) exposed throughout a life cycle to the defoliant DEF. DEF concentrations > or = 0.246 microgram/l reduced survival through release of the first brood. Young production was completely arrested in DEF concentrations > or = 0.606 microgram/l, while concentrations > or = 0.085 microgram DEF/l reduced young production by the population. Concentrations > or = 0.140 microgram/l and > or = 0.085 microgram/l retarded growth rates in older juveniles and young adults, respectively, while stimulating respiration rates. Young mysids excreted less ammonia in DEF concentrations > or = 0.085 microgram/l. Higher O:N ratios during maturation of DEF-exposed mysids suggests greater reliance on energy-rich lipid substrates to support elevated metabolic demands, leaving reduced lipid for reproductive preparations.