Effects of salinity and temperature on the acute toxicity of the pesticides, dimethoate and chlorpyrifos in post-larvae and juveniles of the whiteleg shrimp

Ashwini Pandurang Pawar, Sushant Vilas Sanaye, Soorambail Shyama, Rayadurga Anantha Sreepada, Ajit Sharadrao Dake

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

In this article, the acute toxicity of the organophosphorus pesticides (OPs), dimethoate (DMT) and chlorpyrifos (CPF) in post-larvae, and juveniles of Litopenaeus vannamei at different ambient salinity (5, 15 and 25) and temperature (15, 25 and 34 °C) regimes were compared with standard exposure conditions (temperature, 27 °C and salinity, 20). Chlorpyrifos was significantly more toxic to both life stages (P < 0.05). Post-larvae were more sensitive than juveniles to both OPs in all altered salinities and temperatures (P < 0.05). Acute toxicity indices (96 h LC50 values) showed that lower salinities (5 and 15) and temperature (15 °C) induced significantly higher pesticide toxicity (P < 0.05) in both life stages. Very low acute toxicity indices of DMT and CPF at varying levels of salinity and temperature highlight the importance of monitoring OPs pollution in low-saline shrimp aquaculture ponds. Results of the present study provide baseline information for monitoring pesticide pollution in low-saline shrimp aquaculture ponds which are influenced by changes in climatic conditions.

Original languageEnglish
Article number100240
JournalAquaculture Reports
Volume16
DOIs
StatePublished - 1 Mar 2020
Externally publishedYes

Keywords

  • Chlorpyrifos
  • Climate change
  • Dimethoate
  • Shrimp aquaculture
  • Toxicity

ASJC Scopus subject areas

  • Aquatic Science
  • Animal Science and Zoology

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