A5065001790- Avian ecology and behavior
- Animal Behavior and Reproduction
- Wildlife Ecology and Conservation
- Plant and animal studies
- Species Distribution and Climate Change
- Ecology and Vegetation Dynamics Studies
- Genetic diversity and population structure
- Fish Ecology and Management Studies
- Animal Ecology and Behavior Studies
- Genetic and phenotypic traits in livestock
- Rangeland and Wildlife Management
- Bird parasitology and diseases
- Marine and fisheries research
- Aquatic Invertebrate Ecology and Behavior
- Economic and Environmental Valuation
- Climate variability and models
- Fire effects on ecosystems
- Turtle Biology and Conservation
- Ecology and biodiversity studies
- Environmental DNA in Biodiversity Studies
- Coastal wetland ecosystem dynamics
- Ancient Near East History
- Identification and Quantification in Food
- Botany, Ecology, and Taxonomy Studies
- Evolution and Genetic Dynamics
University of California, Davis
2016-2025
California Department of Fish and Wildlife
1999-2017
University of California System
2003-2010
University of Wisconsin–Eau Claire
2010
Ducks Unlimited
2005
Southern Illinois University Carbondale
2005
Natural Resources Conservation Service
2005
University of Tennessee at Knoxville
2005
University of California, Santa Cruz
2000
The Scarborough Hospital
1991-1995
Conspecific brood parasitism (CBP), whereby females lay eggs in the nests of other conspecifics, occurs over 200 species birds. As an alternative tactic to typical nesting, CBP expands and enriches classic avian clutch size problem. It is integral component a flexible life-history strategy and, consequently, many intriguing aspects this behavior—adaptive benefits parasites, host-parasite interactions, population evolutionary dynamics—can be understood best from perspective. Because parasite...
We tested the hypothesis that fish species diversity would be positively related to resource in a series of northern and southeastern Ontario lakes. At macrospatial scale (among lakes), number per lake was significantly correlated with two indices habitat heterogeneity: area shoreline development factor. microspatial habitats within detailed analyses revealed several significant correlations between heterogeneity, although some effects latitude were apparent. Fish lakes invertebrate prey...
M. Festa-Bianchet, Apollonio (eds.). 2003. Animal Behavior and Wildlife Conservation. Island Press, Washington, D.C. 380pp. ISBN 1-55963-959-8, price (paper), $35.00. Efforts to link behavioral ecology conservation biology have been ongoing for nearly a decade, including dedicated section in Oikos (Ulfstrand 1996), several reviews (Caro 1999; Curio 1996; Sutherland 1998), 3 full volumes 1998; Clemmons Buchholz 1997; Gosling 2000). Conservation is the latest contribution this rapidly growing...
Young-of-the-year largemouth bass Micropterus salmoides in Lake Opinicon, Ontario, displayed a divergence size over their first summer. The range total body lengths was 11 mm when year-0 fish were captured on June 22–25, and this increased to 26 by September 8–12. not due protracted or disrupted spawning period and, instead, appeared be underlain differences diet prey availability. Diets of small large (less than greater the cohort mean length, respectively) differed progressively Large...
Radio Frequency Identification (RFID) technology has been broadly applied in the biological sciences to yield new insights into behavior, cognition, population biology, and distributions. RFID systems entail wireless communication between small tags that, when stimulated by an appropriate radio frequency transmission, emit a weak, short-range signal that conveys unique ID number. These tags, which often operate without battery, can be attached animals such their presence at particular...
1. Recent legislation in California, USA, has restricted traditional open‐field burning of rice straw residues, leading farmers to adopt alternative methods disposal such as post‐harvest flooding fields. These changes may benefit wildlife because winter‐flooded fallow fields provide foraging habitat migratory waterfowl. In turn, the activity waterfowl help increase decomposition, providing a reciprocal farmers. We examined effects on decomposition and nitrogen mineralization following...
We develop a simple model to explore the conditions under which intraspecific brood parasitism would be evolutionarily stable in cavity-nesting bird, Barrow's goldeneye. Our results show that can maintained by negative frequency-dependent selection, is consistent with recent speculations. However, when we include effects of density dependence, find threshold below on fitness are negligible but above frequency dependence plays prominent role. Patterns either mixed strategy (ESS) or...
Acute stress response has been linked to body condition and associated with the allocation of finite energy resources in wild, free-living birds. However, relationship between individuals acute is less clear for birds kept captive settings, where are abundant readily available. We evaluated how individual variation condition, reflected as mass, relates adult Wood Ducks (Aix sponsa) hatched from eggs collected wild reared captivity while were fed ad libitum, out breeding season. determined...
Abstract: In conservation biology, researchers often want to study the reasons why an endangered population is faring poorly but are unable it directly for logistical or political reasons. Instead they a species that substitutes one of concern in hope will cast light on problem. Here we outline assumptions underlying this approach. Substitutes can be different populations and may chosen because similar biologically target representatives constellation which one. They also used develop...
Few studies have quantitatively projected changes in demography response to climate change, yet doing so can provide important insights into the processes that may lead population declines and species distributions. Using a long-term mark-recapture data set, we examined influence of multiple direct indirect effects weather on adult juvenile survival for Song Sparrows (Melospiza melodia) California. We found evidence positive, effect winter temperature survival, prior rainy season...
Density‐dependent population regulation is observed in many taxa, and understanding the mechanisms that generate density dependence especially important for conservation of heavily‐managed species. In one such system, North American waterfowl, often at continental scales, nest predation has long been implicated as a key factor driving this pattern. However, despite extensive research on topic, it remains unclear if how influences rates. Part confusion may have arisen because previous studies...
Environmental contamination is widespread and can negatively impact wildlife health. Some contaminants, including heavy metals, have immunosuppressive effects, but prior studies rarely measured disease simultaneously, which limits our understanding of how contaminants pathogens interact to influence Here, we mercury concentrations, influenza infection, antibodies body condition in 749 individuals from 11 species wild ducks overwintering California. We found that the odds infection increased...
We tested whether predation on duck nests ( Anas spp.) was density dependent at three spatial scales using artificial and natural in the Suisun Marsh, California, USA. At largest scale, we used 5 years (1998–2002) of data to examine variation nest success densities among 8–16 fields per year, each 5–33 ha size (n=62 fields). an intermediate deployed (2000, n=280) within 1‐ha plots experimental (5, 10, 20 −1 ) a complete randomized block design examined differences predation. smallest...
Avian interspecific brood parasites differ considerably in their commitment to parasitism; 87 species are obligate parasites, whereas 35 known be facultative parasites. This variation is strongly related mode of development. Obligate parasitism found almost exclusively altricial species, predominant precocial birds. We propose that the association between development and form reflects a fundamental difference birds relative benefits emancipation from parental care after laying. argue obtain...