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Publisher: USGS | Science Center: Patuxent Wildlife Research Center (PWRC, Laurel) | Format: URL
www.pwrc.usgs.gov — Information about ecotoxicological exposure and its effects on terrestrial vertebrates residing in estuarine and coastal habitats like the Atlantic, Gulf and Pacific Coasts, Alaska and Hawaii, as well as the Great Lakes. These vertebrates include birds, mammals, amphibians and reptiles. The data is a compilation of results from computerized More...
Publisher: USGS | Science Center: Patuxent Wildlife Research Center (PWRC, Laurel) | Format: URL
www.pwrc.usgs.gov — BEST Large River Fish Health Data Query Tool provides a simplified portal for accessing database that serves fish health endpoints measured through the Biomonitoring of Environmental Status and Trends (BEST) Project's Large River Monitoring Network (LRMN). The tool allows the user to search the database by species, chemical, river basin, sampling More...
May 21 2009 | Publisher: USGS | Format: URL
pubs.usgs.gov — A new tool provides land managers with a predictive model for mapping the potential distribution of desert tortoise habitat and to evaluate different land-use issues the tortoises face at a landscape scale. The model incorporates an extensive amount of field data for desert tortoises, as well as environmental data related to landscape attributes, More...
May 2009 | Publisher: USGS | Science Center: Western Ecological Research Center (WERC, Sacramento) | Format: URL
www.werc.usgs.gov — This study encompasses the range of the Mojave population of desert tortoises north and west of the Colorado River, as well as a small portion of the northwest Sonoran Desert, and comprises 336,594 square kilometers of basin-and-range topography, including parts of California, Nevada, Utah, and Arizona. The habitat model provides a basal More...
December 2008 | Publisher: USGS | Format: URL
soundwaves.usgs.gov — Kristen Hart and Keith Ludwig of the USGS Florida Integrated Science Center (FISC) participated in two research cruises in 2008 to study patterns of habitat use by endangered sea turtles in and around the National Park. Hart's research effort focuses on quantifying patterns of sea turtle habitat use, employing capture-recapture and satellite- and More...
2007 | Publisher: USGS | Science Center: Western Ecological Research Center (WERC, Sacramento) | Format: .PDF
www.werc.usgs.gov — The Alameda whipsnake (Masticophis lateralis euryxanthus) is both a federally and state listed endangered species limited to scrub and chaparral habitat within Contra Costa and Alameda Counties, CA. Loss and fragmentation of habitat due to agricultural and urban development over the last 100 years are cited as the main causes of its decline. Based More...
June 2003 | Publisher: USGS | Science Center: Western Ecological Research Center (WERC, Sacramento) | Format: URL
www.werc.usgs.gov — Instructions for ordering equipment and culture media; summary of how to draw blood and conduct nasal lavages; and information on how to contract for laboratory analysis and ship laboratory samples.
March 2003 | Publisher: USGS | Science Center: Patuxent Wildlife Research Center (PWRC, Laurel) | Format: .PDF
www.pwrc.usgs.gov — Summary of Patuxent Wildlife Research Center's progress to assess the status of Northern diamondback terrapins in the Chesapeake Bay. PWRC's objectives included providing "information on current habitat type and activities of the diamondback terrapin," and evaluating "the genetic relatedness, levels of gene flow and degree of isolation of More...
June 2001 | Publisher: USGS | Science Center: Western Ecological Research Center (WERC, Sacramento) | Format: URL
www.werc.usgs.gov — Salvage of injured, recently dead, ill, and dying desert tortoises is a very important part of recovery programs for these reptiles. Salvaged desert tortoises can provide a wealth of information about such subjects as health, disease, presence of heavy metals and other toxicants, and causes of mortality in populations. When tortoises are salvaged More...
Publisher: USGS | Science Center: Western Ecological Research Center (WERC, Sacramento) | Format: .PDF
www.werc.usgs.gov — One cause for declines in desert tortoise populations is predation on juveniles by common ravens (Corvus corax), a predatory bird species native to the Mojave Desert. The Recovery Plan for the Desert Tortoise recommended that research be conducted on sources of mortality (including natural predation). This study was implemented to investigate the More...
Publisher: Other Federal Agency (National Park Service (NPS)) | Format: URL
science.nature.nps.gov — This website represents National Park Service Inventory and Monitoring Program's goal to collect, organize, and make available natural resource data and to contribute to the Service's institutional knowledge. Its goals are to inventory the natural resources under National Park Service stewardship to determine their nature and status; monitor park More...
Publisher: USGS | Science Center: Southwest Biological Science Center (SBSC, Flagstaff) | Format: URL
sbsc.wr.usgs.gov — The desert tortoise is listed as a threatened species under federal and California versions of the Endangered Species Act. The recovery plan for the desert tortoise recommended that additional data be collected on the reproductive ecology of the species throughout the range. Annual meetings between USGS, Biological Resources Division researchers More...
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U.S. Geological Survey