Temporal decline of 1080 within meat baits used for control of wild dogs in New South Wales
1991
Fleming, P.J.S. (New South Wales Agriculture and Fisheries, Orange (Australia). Agricultural Research and Veterinary Centre) | Parker, R.W. (Queensland Dept. of Lands, Inglewood (Australia). Robert Wicks Research Station)
Baits were injected with 0.2 mL of standard 1080 solution (nominal dose of 6.00 mg of pure 1080 per bait) and placed in the field. In a long-term trial, 10 baits were collected at seven intervals between 3 hours and 226 days, and analysed for residual 1080 by liquid chromatography. The recoverable 1080 content declined markedly over the first 48 days, although at 226 days all 10 baits retained some 1080. By 42.4 days the mean residual level of 1080 in the baits was predicted to be less than the theoretical LD99 for wild dogs. The LD99 for domestic cattle-dogs was predicted to be still present in baits at 72.9 days. Loss of 1080 from these baits was not correlated with rainfall, temperature or humidity. In a short-term trial, 10 baits were collected at 11 intervals between Hour 0 and Hour 200. The recoverable 1080 content decreased by 3.09 mg (61 percent of the injected dose) within the first hour after injection and declined to a low of 2.70 mg at Hour 50. The level of recovered 1080 then rose to 73 percent of the injected dose at Hour 150.
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