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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 Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — In an attempt to decrease pesticide pollution of aquatic ecosystems, we have begun a project to develop biological control agents to protect plants against fungal diseases. This study has three objectives: (1) understanding how fungi cause disease; (2) understanding how plants that are symbiotic with certain fungi are resistant to fungal diseases; More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — Many diseases of trout and salmon persist in our cultured fish stocks today, despite improvements in fish culture practices and years of research on vaccines and chemotherapeutants. An excellent example is bacterial kidney disease (BKD), caused by the bacterium Renibacterium salmoninarum. Infections by R. salmoninarum are considered by many to be More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — A management decision was made in 1994 to increase survival of migrating juvenile salmon by increasing the proportion of river water and fish passed via spill at Snake and Columbia river dams. One result of this action was an increase in dissolved gas supersaturation, which can lead to gas bubble disease in fish. This disease can lead to More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — Anadromous salmonids are susceptible to a variety of pathogenic microorganisms, including at least 30 bacteria and viruses. Whereas the impact of these microorganisms on salmonids in wild and natural rearing areas is difficult to measure, losses from disease among hatchery salmonids are both common and well documented. The immunology laboratory More...
Publisher: USGS | Science Center: National Wildlife Health Center (NWHC, Madison) | Format: URL
www.nwhc.usgs.gov — The ongoing pandemic of Foot-and-Mouth Disease (FMD) in Europe and other parts of the world is of great concern to the North American Agriculture Community. FMD may also pose a significant threat to North American wildlife, including white-tailed deer, other deer species, feral pigs, bison, moose, antelope, peccaries, musk ox, caribou, sheep and More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — Viral infections are common causes of disease outbreaks and mortalities in both wild and captive fish populations. Due to the long history of virus outbreaks there is a substantial body of knowledge about viruses within the field of fish pathology. This project involves research and development studies which create, modify and apply modern More...
Publisher: USGS | Science Center: Forest and Rangeland Ecosystem Science Center (FRESC, Corvallis) | Format: URL
fresc.usgs.gov — Biologists and managers on Washington's Olympic Peninsula, as throughout western Washington, are concerned about increased observations over the last several years of emaciated deer with symptoms of excessive hair-loss. This Web page describes a study to evaluate modern pellet-group survey methods, estimate abundance of deer and elk, identify More...
Publisher: USGS | Science Center: Fort Collins Science Center (FORT, Ft. Collins) | Format: URL
www.fort.usgs.gov — As one of one of the big three charismatic predators in North America, mountain lions top the list of national park management challenges that require balancing the preservation of species with protection of park visitors. In Rocky Mountain National Park and its environs, USGS Fort Collins Science Center (FORT) scientists are collaborating with More...
Publisher: USGS | Science Center: National Wildlife Health Center (NWHC, Madison) | Format: URL
www.nwhc.usgs.gov — Chronic wasting disease (CWD) is a disease of the nervous system in deer and elk that results in distinctive brain lesions. It continues to be a major issue for wildlife scientists throughout the Nation, and a key focus for research at the USGS National Wildlife Health Center (NWHC). Research is focused on understanding how the disease is More...
Publisher: USGS | Science Center: Fort Collins Science Center (FORT, Ft. Collins) | Format: URL
www.fort.usgs.gov — How do you study something that flies under cover of darkness? This question persistently troubles scientists investigating the mysterious lives of bats. The 45 bat species that occur in the continental United States play important roles in U.S. ecosystems as major predators of flying insects and pollinators of desert plants. Bats also play an More...
Publisher: USGS | Science Center: Western Fisheries Research Center (WFRC, Seattle) | Format: URL
wfrc.usgs.gov — Bacterial kidney disease (BKD) caused by Renibacterium salmoninarum has been implicated as a significant factor in the 5-year decline of the chinook salmon populations in Lake Michigan that began during 1988. In 1999, researchers at the WFRC began a multi-year study in coordination with Great Lakes fishery biologists to examine the role of BKD in More...
U.S. Department of the Interior |
U.S. Geological Survey