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Growth and survival of Colorado squawfish, Ptychocheilus lucius, larvae under fluctuating 18, 22, and 26 degrees C (5 degrees C diel fluctuations) and constant 18, 22, 26 degrees C, and 30 degrees C temperature conditions and ration size corresponding to 12.5, 28, 64,142, 320 brine shrimp nauplii fish(-1) day(-1) was determined from laboratory experiments. Growth was optimal at 31 degrees C and high at temperatures of 26 degrees C to 30 degrees C, at the highest food abundance. Lowest growth was under lowest food rations and highest temperatures. Growth of Colorado squawfish larvae declined substantially at temperatures < 22 degrees C. Neither growth nor survival was significantly different between fluctuating or...
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The rapidly increasing demands being placed on our deserts points to the urgent need for a connectivity assessment that spans multiple jurisdictional boundaries and promotes the partnerships needed to implement a regional conservation strategy for this diverse and striking landscape. The vast scale of renewable energy developments proposed in the California deserts are likely to impact habitat connectivity, alter essential ecosystem functions, and eliminate opportunities for species to shift their ranges in response to climate change. The potential impacts of energy development on our existing public lands, specifically to wildlife and their ability to move across the landscape, are enormous. The primary goal of...
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Overview These maps and datasets provide both: 1) a national-level overview of the distribution and density of federally listed or imperiled plant and animal species by county and watershed; and, 2) access to which species are at-risk in each county and watershed. Value Based on the best available information on the known location of at-risk species populations, these nationally significant datasets can be used as context for setting regional or national conservation priorities as well as a starting point for learning more about conservation priorities in your own backyard. Features & Benefits These summarized county/watershed distribution datasets are based on our national species dataset of location records (element...
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Areas of Conservation Emphasis (ACE-II) is a Department of Fish and Wildlife project that was begun in 2009 to provide data to help guide and inform conservation priorities in California.
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REAs synthesize the best available information about resource conditions and trends within an ecoregion. They highlight and map areas of high ecological value, including important wildlife habitats and corridors, and gauge their potential risks from climate change, wildfires, invasive species, energy development, and urban growth. REAs also map areas that have high energy development potential, and relatively low ecological value, which could be best-suited for siting future energy development. In addition, REAs establish landscape-scale baseline ecological data to gauge the effect and effectiveness of future management actions. The Mojave Basin and Range REA was initiated in July 2010. It has been completed and...
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The Nature Conservancy has been a leader in spatial conservation planning for many years. The primary planning tool used by the Conservancy for landscape-scale conservation planning over the past decade has been Ecoregional Assessments. Our United States Ecoregional Assessments identify priority areas for conservation within the United States. This includes data from 67 Ecoregional Assessments, which identified over 9,000 conservation priority areas. Importantly, this dataset contains the conservation targets that we hope to conserve within these priority areas. Conservation targets include both species and habitat types (e.g. plant communities; ecosystems). Our dataset includes 8,507 unique species and 6,633 habitat...
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The Environmental Conservation Online System (ECOS) is a gateway web site that provides access to data systems in the U.S. Fish and Wildlife Service (Service) and other government data sources. This central point of access assists Service personnel in managing data and information, and it provides public access to information from numerous Service databases. ECOS serves a variety of reports related to FWS Threatened and Endangered Species. A selection of our most popular reports is listed below. See the Species Reports for the complete list. Listed Species Summary All Threatened and Endangered Animals All Threatened and Endangered Plants Reclassified Species Delisted Species Obtaining an Official Species List:...


map background search result map search result map Areas of Conservation Emphasis (ACE II) Mojave Basin and Range Rapid Ecoregional Assessment (REA) The Nature Conservancy's Priority Conservation Areas A Linkage Network for the California Deserts Environmental Conservation Online System Listed and Imperiled Species by County and Watershed Tennessee State Wildlife Action Plan Priorities Adjacent to Karst Habitats Tennessee State Wildlife Action Plan Priorities Adjacent to Karst Habitats Mojave Basin and Range Rapid Ecoregional Assessment (REA) A Linkage Network for the California Deserts Areas of Conservation Emphasis (ACE II) The Nature Conservancy's Priority Conservation Areas Environmental Conservation Online System Listed and Imperiled Species by County and Watershed