Mechanism of abrupt increase in toxicity of organophosphorothionates to tiger shrimp larvae with progress of stages

K. Kobayashi, R. M. Rompas, N. Imada, Yuji Oshima

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

To elucidate the cause of an abrupt increase in the toxicity of organophosphorus pesticides to tiger shrimp Penaeus japonicus with the progress of larval stages, the toxicity of the pesticides to the shrimp larvae and the inhibition of larval acetylcholinesterase (AChE) by the pesticides, and the metabolism of fenitrothion (FS) in the larvae were studied at different stages, respectively. The toxicity of thiono-forms to the larvae increased abruptly with the progress of stages, whereas that of oxo-forms was unchanged from nauplius to postlarva. The susceptibility of larval AChE to each pesticide was almost unchanged in these stages. FS metabolic activity of zoea was very low, but the activity increased abruptly with their growth and resulted in the increase of fenitrooxon which displays extremely high toxicity as compared with FS, i.e., the increase in the toxicity of thiono-forms to shrimp larvae with the progress of the stages must be due to the increase in the oxidative desulfuration activity.

Original languageEnglish
Title of host publicationWater Science and Technology
Pages487-496
Number of pages10
Volume23
Edition1-3
Publication statusPublished - Jan 22 1991
EventProceedings of the 15th Biennial Conference of the International Association on Water Pollution Research and Control - Kyoto, Jpn
Duration: Jul 29 1990Aug 3 1990

Other

OtherProceedings of the 15th Biennial Conference of the International Association on Water Pollution Research and Control
CityKyoto, Jpn
Period7/29/908/3/90

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All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Water Science and Technology

Cite this

Kobayashi, K., Rompas, R. M., Imada, N., & Oshima, Y. (1991). Mechanism of abrupt increase in toxicity of organophosphorothionates to tiger shrimp larvae with progress of stages. In Water Science and Technology (1-3 ed., Vol. 23, pp. 487-496)