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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
Library Call Number Additional Info Location Last
NTIS  PB93-236255 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 9p
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.