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Full-Text Articles in Life Sciences
Genetic And Environmental Drivers Of Migratory Behavior In Western Burrowing Owls And Implications For Conservation And Management, Kelly Barr, Christen M. Bossu, Rachel A. Bay, Eric C. Anderson, Jim Belthoff, Lynne A. Trulio, Debra Chromczak, Colleen L. Wisinski, Thomas B. Smith, Kristen C. Ruegg
Genetic And Environmental Drivers Of Migratory Behavior In Western Burrowing Owls And Implications For Conservation And Management, Kelly Barr, Christen M. Bossu, Rachel A. Bay, Eric C. Anderson, Jim Belthoff, Lynne A. Trulio, Debra Chromczak, Colleen L. Wisinski, Thomas B. Smith, Kristen C. Ruegg
Biology Faculty Publications and Presentations
Migration is driven by a combination of environmental and genetic factors, but many questions remain about those drivers. Potential interactions between genetic and environmental variants associated with different migratory phenotypes are rarely the focus of study. We pair low coverage whole genome resequencing with a de novo genome assembly to examine population structure, inbreeding, and the environmental factors associated with genetic differentiation between migratory and resident breeding phenotypes in a species of conservation concern, the western burrowing owl (Athene cunicularia hypugaea). Our analyses reveal a dichotomy in gene flow depending on whether the population is resident or migratory, …
Patterns And Mechanisms Of Heterogeneous Breeding Distribution Shifts Of North American Migratory Birds, Hanna M. Mccaslin, Julie A. Heath
Patterns And Mechanisms Of Heterogeneous Breeding Distribution Shifts Of North American Migratory Birds, Hanna M. Mccaslin, Julie A. Heath
Biology Faculty Publications and Presentations
There is widespread evidence that species distributions are shifting in response to climate change. Warming temperatures and climate niche constraints are hypothesized drivers of northward shifts in temperate migratory bird breeding distributions, but heterogeneity in the direction of distribution shifts suggests that the climate niche hypothesis does not explain all changes in distributions. We propose that: 1) changes in migration costs and benefits related to dampened seasonal differences between breeding and winter areas, 2) sensitivity to supplemental cues that affect duration of migration and onset of reproduction, 3) a latitudinal mismatch-driven fitness gradient, or a combination of these drivers may …
Patterns Of Genetic Structure In The American Kestrel (Falco Sparverius): Influence Of Distance And Migration And Implications For Monitoring And Management, Michaela Brinkmeyer
Patterns Of Genetic Structure In The American Kestrel (Falco Sparverius): Influence Of Distance And Migration And Implications For Monitoring And Management, Michaela Brinkmeyer
Boise State University Theses and Dissertations
Genetic structure is useful for inferring patterns of selection, gene flow and connectivity, and can define management units that aid in interpretation of spatially-specific trends and species management. American kestrels (Falco sparverius) are a widespread, generalist species with fully migratory, partial migrant, and resident populations. In many parts of their range, kestrels show evidence of declining population trends; however, it has been difficult to identify threats to kestrels because of differences in regional trends. We used a genome-wide sequencing approach to investigate the genetic structure of American kestrels, test hypotheses about the processes that influence genetic structuring of …
Migration Patterns, Use Of Stopover Areas, And Austral Summer Movements Of Swainson's Hawks, Michael N. Kochert, Mark R. Fuller, Linda S. Schueck, Laura Bond, Marc J. Bechard, Brian Woodbridge, Geoff L. Holroyd, Mark S. Martell, Ursula Banasch
Migration Patterns, Use Of Stopover Areas, And Austral Summer Movements Of Swainson's Hawks, Michael N. Kochert, Mark R. Fuller, Linda S. Schueck, Laura Bond, Marc J. Bechard, Brian Woodbridge, Geoff L. Holroyd, Mark S. Martell, Ursula Banasch
Biology Faculty Publications and Presentations
From 1995 to 1998, we tracked movements of adult Swainson’s Hawks (Buteo swainsoni), using satellite telemetry to characterize migration, important stopover areas, and movements in the austral summer. We tagged 46 hawks from July to September on their nesting grounds in seven U.S. states and two Canadian provinces. Swainson’s Hawks followed three basic routes south on a broad front, converged along the east coast of central Mexico, and followed a concentrated corridor to a communal area in central Argentina for the austral summer. North of 20°N, southward and northward tracks differed little for individuals from east of the …
Estimating The Latitudinal Origins Of Migratory Birds Using Hydrogen And Sulfur Stable Isotopes In Feathers: Influence Of Marine Prey Base, Casey A. Lott, Timothy D. Meehan, Julie A. Heath
Estimating The Latitudinal Origins Of Migratory Birds Using Hydrogen And Sulfur Stable Isotopes In Feathers: Influence Of Marine Prey Base, Casey A. Lott, Timothy D. Meehan, Julie A. Heath
Julie Heath
Hydrogen stable isotope analysis of feathers is an important tool for estimating the natal or breeding latitudes of nearctic-neotropical migratory birds. This method is based on the latitudinal variation of hydrogen stable isotope ratios in precipitation in North America (iDp) and the inheritance of this variation in newly formed feathers (iDf). We hypothesized that the typically strong relationship between iDp and iDf would be decoupled in birds that forage in marine food webs because marine waters have relatively high iD values compared to iD values for local precipitation. Birds that forage on marine prey bases should also have feathers with …