Record Display for the EPA National Library Catalog


Main Title Influence of an Insect Growth Regulator on the Larval Development of an Estuarine Shrimp.
Author McKenney, C. L. ; Matthews, E. ;
CORP Author Environmental Research Lab., Gulf Breeze, FL.
Publisher c1990
Year Published 1990
Report Number EPA/600/J-90/108;
Stock Number PB90-264706
Additional Subjects Growth regulators ; Inhibitors ; Insects ; Shrimp ; Estuaries ; Larvae ; Exposure ; Reprints ; Water pollution effects(Animals) ; Methoprene ; Palaemonetes pugio ; Mosquito control ; Metamorphosis
Library Call Number Additional Info Location Last
NTIS  PB90-264706 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 12p
The influence of methoprene, an insect growth regulator used in mosquito control, on larval development of the estuarine grass shrimp (Palaemonetes pugio) was examined in the laboratory. No grass shrimp larvae successfully completed metamorphosis when continuously exposed to 1000 microg methoprene/liter. Completion of larval metamorphosis was significantly reduced by exposure to 100 microg/liter of the isomeric mixture (R,S)-methoprene but not the single isomer formulation (S)-methoprene. No statistically significant difference was revealed, however, in ability to inhibit metamorphosis between these two isomeric types across the broad range of exposure concentrations from 0.1 to 1000.0 microg/liter. The first two larval stages and the final premetamorphic larval stage were more sensitive to methoprene toxicity than intermediate larval stages. Methoprene exposure did not alter either the duration of total larval development or the total number of larval stages prior to metamorphosis. (Copyright (c) 1990 Elsevier Science Publishers Ltd., England).