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INFLUENCE OF AN INSECT GROWTH REGULATOR ON THE LARVAL DEVELOPMENT OF AN ESTUARINE SHRIMP
Citation:
McKenney, Jr., C. AND E. Matthews. INFLUENCE OF AN INSECT GROWTH REGULATOR ON THE LARVAL DEVELOPMENT OF AN ESTUARINE SHRIMP. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-90/108 (NTIS PB90264706).
Description:
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. o grass shrimp larvae successfully completed metamorphosis when continuously exposed to 1000 ug methoprene litre-1. ompletion of larval metamorphosis was significantly reduced by exposure to 100 ug litre-1 of the isomeric mixture (R,S)-methoprene but not the single isomer formulation (S)-methoprene. o 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 ug litre-1. he first two larval stages and the final premetamorphic larval stage were more sensitive to methoprene toxicity than intermediate larval stages. ethoprene exposure did not alter either the duration of total larval development or the total number of larval stages prior to metamorphosis.