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We propose to evaluate application of ammonium chloride for the purpose of removing invasive Northern crayfish (Faxonius virilis, formerly Orconectes virilis) and Red swamp crayfish (Procambarus clarkii) from aquatic systems. Adding small amounts of ammonium chloride to aquatic systems may be a cost-effective and low-impact way to eradicate invasive crayfish and support conservation of native aquatic species. We will first evaluate dosages and concentrations in the laboratory and then utilize the information derived from those laboratory studies to conduct removal of crayfish from small stock ponds in the field. A minimum of two treatment ponds will be evaluated over a season to evaluate effectiveness. This project...
Managing invasive species is both a complex spatial problem and a multi-species problem, yet we lack opportunities and tools that address both problems simultaneously. Here, we propose to meet this need through a collaboration with the U.S. Forest Service (USFS) to develop a data-driven, multi-species simulation framework; our goal is to test and transfer efficient and effective management strategies that optimize control of aquatic invasive species and promote the persistence of at-risk species in the southwestern U.S. Our target species are the invasive American bullfrog (Lithobates catesbeianus) and an isolated metapopulation of the Arizona treefrog (Hyla wrightorum), a species of conservation concern in Arizona....
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