35 Works

Shedding light on environmentally transmitted parasites: darker conditions within lakes promote larger epidemics

Clara Shaw, Spencer Hall, Erin Overholt, Carla Cáceres, Craig Williamson & Meghan Duffy
Parasite fitness depends on a successful journey from one host to another. For parasites that are transmitted environmentally, abiotic conditions might modulate the success of this journey. Here we evaluate how light, a key abiotic factor, influences spatiotemporal patterns of zooplankton disease where light varies seasonally, across lakes, and with depth in a lake. In an in situ experiment using those three sources of variation, we tested sensitivity of spores of two parasites to ambient...

Network Neuroscience Visualizer

White Matter Tracts Surface Visualizer

A Values-Based Learning Model to Impact Maturational Change: The College Fraternity as Developmental Crucible

Tim Reuter, Elgan Baker, Michael V. Hernandez & Dan Bureau

Living in Your Letters: Assessing Congruence Between Espoused and Enacted Values of One Fraternity/Sorority Community

Heather Matthews, Leigh Featherstone, Lisa Blunder, Allison J. Gerling, Sarah Lodge & Rachel B. Messenger

Data from: Volatile fatty acid and aldehyde abundances evolve with behavior and habitat temperature in Sceloporus lizards

Stephanie Campos, Jake Pruett, Helena Soini, J. Jaime Zúñiga-Vega, Jay Goldberg, Cuauhcihuatl Vital-García, Milos Novotny, Diana Hews & Emília Martins
Animal signals evolve by striking a balance between the need to convey information through particular habitats and the limitations of what types of signals can most easily be produced and perceived. Here, we present new results from field measures of undisturbed behavior and biochemical analyses of scent marks from 12 species of Sceloporus lizards to explore whether evolutionary changes in chemical composition are better predicted by measures of species behavior , particularly those associated with...

A putative telomerase activator has tissue-specific effects on telomere length in a developing songbird

Sarah Wolf, Keegan Stansberry, Kristen Content & Kimberly Rosvall
There is good evidence that telomeres predict variation in health and longevity, yet it is unclear whether these patterns are causally derived from telomeres per se, in part because relatively little research directly manipulates telomere length during early life, when telomere shortening is most dynamic. Here, we test how the telomerase activator TA-65 (i.e., cycloastrogenol) affects telomere length in five tissues during the peak of growth in the wild tree swallow (Tachycineta bicolor). Following 8...

Seasonal patterns of melatonin alter aggressive phenotypes of female Siberian hamsters

Nikki Rendon, Christopher Petersen, Kathleen Munley, Andrea Amez, Daniel Boyes, Marcy Kingsbury & Gregory Demas
Many animal species exhibit year-round aggression, a behaviour that allows individuals to compete for limited resources in their environment (e.g., food and mates). Interestingly, this high degree of territoriality persists during the non-breeding season, despite low levels of circulating gonadal steroids (i.e., testosterone [T] and oestradiol [E2]). Our previous work suggests that the pineal hormone melatonin mediates a ‘seasonal switch’ from gonadal to adrenal regulation of aggression in Siberian hamsters (Phodopus sungorus); solitary, seasonally breeding...

The plot thickens: Haploid and triploid-like thalli, hybridization, and biased mating type ratios in Letharia

Sandra Lorena Ament-Velásquez, Veera Tuovinen, Linnea Bergström, Toby Spribille, Dan Vanderpool, Juri Nascimbene, Yoshikazu Yamamoto, Göran Thor & Hanna Johannesson
The study of the reproductive biology of lichen fungal symbionts has been traditionally challenging due to their complex and symbiotic lifestyles. Against the common belief of haploidy, a recent genomic study found a triploid-like signal in Letharia. Here, we used genomic data from a pure culture and from thalli, together with a PCR survey of the MAT locus, to infer the genome organization and reproduction in Letharia. We found that the read count variation in...

Data from: Trait plasticity alters the range of possible coexistence conditions in a competition-colonization trade-off

Ranjan Muthukrishnan, Lauren L. Sullivan, Allison Shaw & James Forester
Most of the classical theory on species coexistence has been based on species-level competitive trade-offs. However, it is becoming apparent that plant species display high levels of trait plasticity. The implications of this plasticity are almost completely unknown for most coexistence theory. Here, we model a competition-colonization trade-off and incorporate trait plasticity to evaluate its effects on coexistence. Our simulations show that the classic competition-colonization trade-off is highly sensitive to environmental circumstances and coexistence only...

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  • 2020

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  • Indiana University
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  • University of Montana