A5022670238- Animal Vocal Communication and Behavior
- Wildlife Ecology and Conservation
- Avian ecology and behavior
- Rangeland and Wildlife Management
- Species Distribution and Climate Change
- Genetic and phenotypic traits in livestock
- Bird parasitology and diseases
- Animal Behavior and Reproduction
- Plant and animal studies
- Genetic diversity and population structure
- Ecology and Vegetation Dynamics Studies
Oregon State University
2018-2022
Oregon Department of Fish and Wildlife
2019-2022
Abstract Interspecific hybridization is recognized as an important process in the evolutionary dynamics of both speciation and reversal speciation. However, our understanding spatial temporal patterns that erode versus promote species boundaries incomplete. The endangered, endemic koloa maoli (or Hawaiian duck, Anas wyvilliana ) thought to be threatened with genetic extinction through ongoing introduced congener, feral mallard ( A. platyrhynchos ). We investigated variation hybrid prevalence...
Abstract The mottled duck ( Anas fulvigula ) is nonmigratory and a priority species for regional conservation management because of its limited range declining population trajectory in the western Gulf Coast (WGC) Louisiana Texas, USA. We developed multistate dead‐recovery models banding recovery data (1997–2020) to evaluate potential drivers survival, recovery, post‐summer movements WGC ducks Texas. Annual survival was most strongly associated with sex year, females having lower ± = 0.544...
ABSTRACT An important component for developing effective habitat management plans the endangered, island‐endemic Hawaiian duck (koloa maoli; Anas wyvilliana ) involves gaining a better understanding of how birds are using and characteristics that may influence those behaviors. We conducted year‐round behavioral surveys to determine ducks allocate their time different activities throughout annual cycle in managed natural wetlands wetland taro ( Colocasia esculenta agriculture evaluate...
Year-round behavioral observations and surveys were used to investigate the temporal dynamics of life history events associated variation in activities endangered, island-endemic Hawaiian Duck (Anas wyvilliana) on Kaua‘i, Hawai‘i, USA. Although breeding activity occurred throughout year, backdated brood (n = 67) revealed that birds initiated 94% nests during 9-month period from September through May, their peak nesting season. A greater proportion females 149) paired season (75%) than...
ABSTRACT Surgical implantation of transmitters into the coelomic cavity is a common attachment technique for ducks and geese. Although retention rates are assumed to be high, most studies utilizing this method involve tracking in system where low recapture, resight, or recovery limit ability researchers assess tag loss. We describe extrusion loss radiotransmitters with percutaneous antennas from adult Hawaiian ( Anas wyvilliana ; n = 117) monitored throughout entire annual cycle on Kaua‘i,...
Abstract Adult survival is the most important demographic parameter influencing population dynamics for many bird taxa. Thus, understanding how probabilities and causes of mortality vary throughout annual cycle critical developing informed effective management strategies. In this study, we used radio-telemetry data to evaluate effects biotic (e.g., sex, peak [September–April] vs. off-peak [May–August] nesting seasons) abiotic factors rainfall, year, bi-monthly interval) on adult survival,...