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Toxicity of 2‐ sec ‐butyl‐4,6‐dinitrophenol (dinoseb) and monosodium methanearsonate (msma), individually and in a mixture, to channel catfish ( Ictalurus punctatus ) and fathead minnows ( pimephales promelas )
Author(s) -
Skelley John Royal
Publication year - 1989
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620080709
Subject(s) - pimephales promelas , ictalurus , catfish , toxicity , chemistry , toxicology , ictaluridae , environmental chemistry , fish <actinopterygii> , biology , minnow , fishery , organic chemistry
The toxicity of technical‐grade dinoseb, technical monosodium methanearsonate (MSMA), several formulations of each and a mixture of the two were tested using channel catfish ( Ictalurus punctatus Rafinesque) and fathead minnows ( Pimephales promelas Rafinesque) under standard conditions at 12°C in soft, reconstituted water. The 96‐h LC50s for technical dinoseb were 0.058 mg/L for channel catfish and 0.088 mg/L for fathead minnows. Differences among Vertac General®, Vertac Selective®, Premerge 3®, Gebutox® and technical dinoseb did not affect dinoseb toxicity to either fish species. The 96‐h LC50s for technical MSMA were 2,390 mg/L for channel catfish and 1,210 mg/L for fathead minnows. Formulation had a measurable effect on MSMA toxicity, with the Daconate® and Daconate 6® formulations nearly an order of magnitude more toxic than technical MSMA and Bueno 6® to both fish species. The mixture or joint toxicity of technical dinoseb and technical MSMA was greater than additive (synergistic), with additive toxicity indices for channel catfish and fathead minnows of 0.51 and 5.78, respectively.