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Methods for the diagnosis of acute 3‐chloro‐ p ‐toluidine hydrochloride poisoning in birds and the estimation of secondary hazards to wildlife
Author(s) -
Johnston John J.,
Hurlbut Daniel B.,
Avery Michael L.,
Rhyan Jack C.
Publication year - 1999
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.5620181121
Subject(s) - toxicology , hydrochloride , environmental chemistry , gas chromatography–mass spectrometry , chemistry , biology , chromatography , mass spectrometry , organic chemistry
Female boat‐tailed grackles poisoned with 3‐chloro‐ p ‐toluidine hydrochloride (CPTH) were analyzed by necropsy and gas chromatography‐mass spectrometry (GC‐MS). The necropsies identified the presence of a white precipitate in the pericardium, which had been previously reported as a characteristic of CPTH‐exposed birds. The GC‐MS method, which utilized deuterated CPTH as a surrogate, quantified CPTH residues in the breast tissue and gastrointestinal tract of CPTH‐exposed birds. Comparison of these techniques indicated that the GC‐MS method was more accurate for assessing CPTH poisoning in birds. Regression analyses of consumption versus residue data indicated that the sum of breast and gastrointestinal residues can be used as an estimator of CPTH exposure. Comparison of CPTH residues in grackles with toxicity data for a variety of scavenger and predator species provided risk quotients of less than 0.1. Analysis of these data suggests that secondary hazards associated with the use of CPTH as an avicide for the control of pest birds are minimal.