Record Display for the EPA National Library Catalog

RECORD NUMBER: 7 OF 7

OLS Field Name OLS Field Data
Main Title Variations in Larval Growth and Metabolism of an Estuarine Shrimp 'Palaemonetes pugio' during Toxicosis by an Insect Growth Regulator.
Author McKenney, C. L. ; Celestial, D. M. ;
CORP Author Environmental Research Lab., Gulf Breeze, FL. ;Technical Resources, Inc., Gulf Breeze, FL.
Publisher c1993
Year Published 1993
Report Number EPA/600/J-93/287 ;CONTRIB-803;
Stock Number PB93-236255
Additional Subjects Shrimp ; Insects ; Growth regulators ; Toxicity ; Water pollution effects(Animals) ; Larvae ; Estuaries ; Growth ; Metabolism ; Oxygen ; Analysis of variance ; Reprints ; Methoprene ; Palaemonetes pugio
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB93-236255 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 11/22/1993
Collation 9p
Abstract
The report presents the following conclusions: (1) Exposure of the estuarine shrimp, Palaemonetes pugio, to a juvenile hormone analogue (> or = 8 microgram methoprene/l) throughout larval development inhibited successful completion of metamorphosis; (2) Methoprene exposure retarded growth in early larval stages and postlarvae, but enhanced growth in premetamorphic larvae; (3) Respiration rates of early larvae were elevated by methoprene exposure, but not so older larvae or postlarvae; (4) Lower net growth efficiency (K2 values) in methoprene-exposed early larvae suggests that increased metabolic demands reduced assimilated energy available for growth; and (5) Modifications in O:N ratios of premetamorphic larvae and postlarvae suggest that methoprene altered substrate utilization patterns during metamorphosis.