Abstract
Evaluating lethal toxicant doses for the largest individuals of an invasive vertebrate predator with indeterminate growth
Highlights
Oral toxicants are an important tool for vertebrate pest control and invasive vertebrate management
In Phase 1 of this study we evaluate the limitations of the standard aerial delivery system (ADS) bait (DNM with EPA-approved 80 mg acetaminophen tablet) for lethal control of the largest brown treesnakes
When it became clear that some very large snakes could survive multiple 80 mg acetaminophen doses, we implemented Phase 2 in which we evaluated a slightly larger bait treated with two 80 mg acetaminophen tablets that could be dispensed by the ADS
Summary
Oral toxicants are an important tool for vertebrate pest control and invasive vertebrate management. The amount of active ingredient administered to a target pest animal is modulated by its concentration in a toxic bait and how much the target animal will voluntarily consume. The amount of active ingredient administered is necessarily fixed because it is consumed in a single bolus dose. Toxicant doses for an invasive vertebrate with indeterminate growth. Mammals and birds have been the primary target organisms for development and use of oral vertebrate toxicants. Mammals and birds exhibit determinate growth, wherein they stop growing when they reach a predictable and limited size range shortly after sexual maturity. Most mammal and bird pest species are herbivores or omnivores for which development of a plant-based bait matrix is usually relatively straightforward
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