Record Display for the EPA National Library Catalog
RECORD NUMBER: 49 OF 338
|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.|
|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|
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.