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Articles 91 - 97 of 97
Full-Text Articles in Life Sciences
Persistence And Conspecific Observations Improve Problem-Solving Abilities Of Coyotes, Julie K. Young, Laura Touzot, Stacey P. Brummer
Persistence And Conspecific Observations Improve Problem-Solving Abilities Of Coyotes, Julie K. Young, Laura Touzot, Stacey P. Brummer
USDA Wildlife Services: Staff Publications
Social learning has important ecological and evolutionary consequences but the role of certain factors, such as social rank, neophobia (i.e., avoidance of novel stimuli), persistence, and task-reward association, remain less understood. We examined the role of these factors in social learning by captive coyotes (Canis latrans) via three studies. Study 1 involved individual animals and eliminated object neophobia by familiarizing the subjects to the testing apparatus prior to testing. Studies 2 and 3 used mated pairs to assess social rank, and included object neophobia, but differed in that study 3 decoupled the food reward from the testing apparatus (i.e., altered …
Analysis Of Iophenoxic Acid Analogues In Small Indian Mongoose (Herpestes Auropunctatus) Sera For Use As An Oral Rabies Vaccination Biological Marker, Are R. Berentsen, Robert T. Sugihara, Cynthia G. Payne, Israel Leinbach, Steven F. Volker, Ad Vos, Steffen Ortmann, Amy T. Gilbert
Analysis Of Iophenoxic Acid Analogues In Small Indian Mongoose (Herpestes Auropunctatus) Sera For Use As An Oral Rabies Vaccination Biological Marker, Are R. Berentsen, Robert T. Sugihara, Cynthia G. Payne, Israel Leinbach, Steven F. Volker, Ad Vos, Steffen Ortmann, Amy T. Gilbert
USDA Wildlife Services: Staff Publications
The small Indian mongoose (Herpestes auropunctatus) is a reservoir of rabies virus (RABV) in Puerto Rico and comprises over 70% of animal rabies cases reported annually. The control of RABV circulation in wildlife reservoirs is typically accomplished by a strategy of oral rabies vaccination (ORV). Currently no wildlife ORV program exists in Puerto Rico. Research into oral rabies vaccines and various bait types for mongooses has been conducted with promising results. Monitoring the success of ORV relies on estimating bait uptake by target species, which typically involves evaluating a change in RABV neutralizing antibodies (RVNA) post vaccination. This …
No Detection Of Brodifacoum Residues In The Marine And Terrestrial Food Web Three Years After Rat Eradication At Palmyra Atoll, Central Pacific, A. Wegmann, G. Howald, S. Kropidlowski, N. Holmes, A.B. Shiels
No Detection Of Brodifacoum Residues In The Marine And Terrestrial Food Web Three Years After Rat Eradication At Palmyra Atoll, Central Pacific, A. Wegmann, G. Howald, S. Kropidlowski, N. Holmes, A.B. Shiels
USDA Wildlife Services: Staff Publications
Invasive alien species represent one of the greatest threats to native plants and animals on islands. Rats (Rattus spp.) have invaded most of the world’s oceanic islands, causing lasting or irreversible damage to ecosystems and biodiversity. To counter this threat, techniques to eradicate invasive rats from islands have been developed and applied across the globe. Eradication of alien rats from large or complex island ecosystems has only been successful with the use of bait containing a rodenticide. While effective at eradicating rats from islands, rodenticide can persist in the ecosystem longer than the time required to eradicate the target rat …
Wildlife Management Practices Associated With Pathogen Exposure In Non-Nativewild Pigs In Florida, U.S., Amanda N. Carr, Michael P. Milleson, Felipe A. Hernandez, Hunter R. Merrill, Michael L. Avery, Samantha M. Wisely
Wildlife Management Practices Associated With Pathogen Exposure In Non-Nativewild Pigs In Florida, U.S., Amanda N. Carr, Michael P. Milleson, Felipe A. Hernandez, Hunter R. Merrill, Michael L. Avery, Samantha M. Wisely
USDA Wildlife Services: Staff Publications
Land use influences disease emergence by changing the ecological dynamics of humans, wildlife, domestic animals, and pathogens. This is a central tenet of One Health, and one that is gaining momentum in wildlife management decision-making in the United States. Using almost 2000 serological samples collected from non-native wild pigs (Sus scrofa) throughout Florida (U.S.), we compared the prevalence and exposure risk of two directly transmitted pathogens, pseudorabies virus (PrV) and Brucella spp., to test the hypothesis that disease emergence would be positively correlated with one of the most basic wildlife management operations: Hunting. The seroprevalence of PrV- …
Potential Role Of Wildlife In The Usa In The Event Of A Foot-And-Mouth Disease Virus Incursion, Vienna R. Brown, Sarah N. Bevins
Potential Role Of Wildlife In The Usa In The Event Of A Foot-And-Mouth Disease Virus Incursion, Vienna R. Brown, Sarah N. Bevins
USDA Wildlife Services: Staff Publications
Foot-and-mouth disease (FMD) is caused by foot-and-mouth disease virus (FMDV) which affects domestic and wild cloven-hoofed species. The FMD-free status of the USA and the tremendous economic impact of a virus incursion motivated the development of this evaluation of the potential role of wildlife in the event of a virus introduction. Additionally, this manuscript contains a summary of US vulnerabilities for viral incursion and persistence which focuses specifically on the possible role of wildlife. The legal movement of susceptible live animals, animal products, by-products and animal feed containing animal products pose a risk of virus introduction and spread. Additionally, the …
A Bioeconomic Model For The Optimization Of Local Canine Rabies Control, Aaron Anderson, Johann Kotze, Stephanie A. Shwiff, Brody Hatch, Chris Slootmaker, Anne Conan, Darryn Knobel, Louis H. Nel
A Bioeconomic Model For The Optimization Of Local Canine Rabies Control, Aaron Anderson, Johann Kotze, Stephanie A. Shwiff, Brody Hatch, Chris Slootmaker, Anne Conan, Darryn Knobel, Louis H. Nel
USDA Wildlife Services: Staff Publications
We present a new modeling tool that can be used to maximize the impact of canine rabies management resources that are available at the local level. The model is accessible through a web-based interface that allows for flexibility in the management strategies that can be investigated. Rabies vaccination, sterilization, chemo-contraception, and euthanasia can be specified and limited to specific demographic groups. Additionally, we allowed for considerable complexity in the specification of management costs. In many areas, the costs of contacting additional dogs increases as management effort increases, and this can have important strategic implications. We illustrated the application of the …
Black Bear Use Of Forest Roads In Western Washington, Gary W. Witmer
Black Bear Use Of Forest Roads In Western Washington, Gary W. Witmer
USDA Wildlife Services: Staff Publications
Radiolocations (108) of 20 black bears were used to assess use or avoidance of 3 forest road types in western Washington. Distances of bears to each type of road were compared to distances of 108 random points using t-tests. Females and males avoided 2-lane roads, while only males avoided 1-lane roads, the most common road type in the area. Females, but not males, were located closer to overgrown, spur roads than expected. This road type has substantial cover of grasses, forbs, and berry-producing shrubs along with protective tree cover. This situation may provide easy travel for females along with security …