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The purpose of this project is to determine if a newly formed rapid on the Colorado River is acting as a barrier to invasive non-native fish moving upstream from Lake Mead into the Grand Canyon National Park (GCNP). These non-native fish would threaten native desert fishes upstream to include the endangered Razorback Sucker and the Humpback Chub. The project will fill knowledge gaps on fish movement, species composition, and population dynamics in this minimally studied section of the Colorado River, and inform managers on whether active management actions (e.g. native fish translocations; non-native removals) may be required to conserve native fishes in the western Grand Canyon.
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....
The Collaborative Conservation and Adaptation Strategy Toolbox (CCAST), coordinated by FWS Science Applications and the Bureau of Reclamation, is a platform for collaborative conservation for federal and state natural resource management agencies in the West. CCAST increases communication among the conservation community to advance the development of best management practices to achieve shared conservation goals. This project will provide support for conservation and restoration of semiarid grasslands in the Southwest by establishing a grassland restoration community of practice. Numerous agencies and organizations have been attempting to restore grasslands in the Southwest for decades. However, there remains a...
FWS, Arizona Game and Fish Department, and New Mexico Department of Game and Fish are working collaboratively to advance understanding of two at-risk gartersnake species. An immediate need is to determine where the species are occurring while advancing survey techniques in support of Species Status Assessments and future population viability analysis.There is a dearth of recent survey information throughout the range of the Narrow-headed Gartersnake (Thamnophis rufipunctatus/THRU) and Northern Mexican Gartersnake (T. eques) in Arizona. The project seeks to fill in these gaps by conducting rapid and intensive surveys in a number of sites where the species has not been detected in many years, where observations are...
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