8 Works

Spatiotemporal variation in hatching success and nestling sex ratios track rapid movement of a songbird hybrid zone

Robert Driver, Valentina Ferretti, Emily S. Burton, Michael W. McCoy, Kerri C. Duerr & Robert L. Curry
Hybridization often occurs at the parapatric range interface between closely related species, but fitness outcomes vary: hybrid offspring exhibit diverse rates of viability and reproduction when compared to their parental species. The mobile hybrid zone between two chickadee congeners ( Poecile atricapillus x P. carolinensis ) has been well studied behaviorally and genetically but the viability of hybrids, as well as the underlying mechanisms contributing to hybrid fitness, have remained unclear. To better characterize the...

Figure data and analysis for: The effect of grain size on porewater radiolysis

Joel DeWitt, Sean McMahon & John Parnell
The radiolysis of porewaters by uranium, thorium, and potassium in mineral grains is a recognised source of molecular hydrogen in rock- and sediment-hosted fluids. This radiolytic hydrogen is of geomicrobiological interest as a potential energy source (electron donor) for microbial metabolism, especially in energy-limited settings such as the marine deep biosphere or the subsurface of Mars. Previous efforts to predict the production of radiolytic hydrogen from columns of rock and sediment have tended to rely...

Perception of speaker sincerity in complex social interactions by cochlear implant users

Ning Zhou
Understanding insincere language, for example sarcasm and teasing, is a fundamental element of communication and crucial for maintaining social relationships. This can be a challenging task for cochlear implant users (CIs) who receive degraded suprasegmental information important for perceiving a speaker’s attitude. We measured perception of speaker sincerity (literal positive, literal negative, sarcasm, and teasing) in 16 adults with CIs using an established video inventory. Participants were presented with audio-only and audio-visual social interactions between...

Gene expression in male and female sticklebacks from populations with convergent and divergent throat coloration

Jeffrey McKinnon, W. Burns Newsome & Christopher Balakrishnan
Understanding of genetic mechanisms underlying variation in sexual dichromatism remains limited, especially for carotenoid-based colors. We addressed this knowledge gap in a gene expression study with threespine stickleback. We compared male and female throat tissues across five populations, including two in which female red coloration has evolved convergently. We found that the expression of individual genes, gene ontologies, and coexpression networks associated with red female color within a population differed between California and British Columbia...

Alpha: A Fortran program for simulating porewater radiolysis

Joel DeWitt
The radiolysis of porewaters by uranium, thorium, and potassium in mineral grains is a recognised source of molecular hydrogen in rock- and sediment-hosted fluids. This radiolytic hydrogen is of geomicrobiological interest as a potential energy source (electron donor) for microbial metabolism, especially in energy-limited settings such as the marine deep biosphere or the subsurface of Mars. Previous efforts to predict the production of radiolytic hydrogen from columns of rock and sediment have tended to rely...

Contact After Adoption or Guardianship: Child Welfare Agency and Family Interactions

Nancy Rolock, Kevin White, Heather Ringeisen, Rose Domanico, Rong Bai & Leyla Stambaugh
The purpose of the Understanding Postadoption and Guardianship Instability for Children and Youth Who Exit Foster Care project is to examine rates of instability, factors associated with instability, and the supports and resources that promote post-permanency stability. Ultimately, the project aims to support efforts to build the capacity of federal, state, and local agencies to get accurate information about instability for children who exit foster care to adoption or guardianship. In order to examine these...

Phenotypic correlates of pelvic spine coloration in the Threespine Stickleback (Gasterosteus aculeatus): Implications for function and evolution

Christopher Anderson & Jeffrey McKinnon
Animal color patches may be static or plastic in expression and concealable or continuously visible, yet these aspects of coloration, and their consequences, have been little studied. We address them here using the threespine stickleback (Gasterosteus aculeatus). Despite a rich history of study of stickleback nuptial color pattern evolution, disagreement persists regarding selection pressures and function. However, little research has addressed the role of pelvic spine coloration, a potentially important, and substantially concealable, color pattern...

Stranger danger: A meta-analysis of the dear enemy hypothesis

Jo Werba, Adam Stuckert, Matthew Edwards & Michael McCoy
The dear enemy hypothesis predicts that territorial individuals will be less aggressive toward known neighbors than to strangers. This hypothesis has been well studied and there is a wealth of data demonstrating its prevelance among some taxa. However, a quantitative synthesis is needed to test the generality of the phenomenon, identify key mechanisms driving the behavior, and guide future research. Here we made a comprehensive collection of Dear Enemy data from 138 studies representing 105...

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