9 Works

There is No Away: Where Do People Go When They Avoid an Interpersonal Conflict?

Dale Hample & Jessica Marie Hample

Boardman River 2019 eDNA metabarcoding water sample data

Rebecca Gehri, Wesley Larson, Kristen Gruenthal, Nicholas Sard & Yue Shi
Understanding biodiversity in aquatic systems is critical to ecological research and conservation efforts, but accurately measuring species richness using traditional methods can be challenging. Environmental DNA (eDNA) metabarcoding, which uses high-throughput sequencing and universal primers to amplify DNA from multiple species present in an environmental sample, has shown great promise for augmenting results from traditional sampling to characterize fish communities in aquatic systems. Few studies, however, have compared exhaustive traditional sampling with eDNA metabarcoding of...

Data from: Comparison of fish detections, community diversity, and relative abundance using environmental DNA metabarcoding and traditional gears

Nicholas M. Sard, Seth J. Herbst, Lucas Nathan, Genelle Uhrig, Jeannette Kanefsky, John D. Robinson & Kim T. Scribner
Background Detecting species at low abundance, including aquatic invasive species (AIS), is critical for making informed management decisions. Environmental DNA (eDNA) methods have become a powerful tool for rare or cryptic species detection; however, many eDNA assays offer limited utility for community‐level analyses due to their use of species‐specific (presence/absence) ‘barcodes’. Metabarcoding methods provide information on entire communities based on sequencing of all taxon‐specific barcodes within an eDNA sample. Aims Evaluate measures of fish species...

On What States Do Prices Depend? Answers from Ecuador

Craig Benedict, Mario J. Crucini & Anthony Landry
In this paper, we argue that differences in the cost structures across sectors play an important role in firms’ decisions to adjust their prices. We develop a menu-cost model of pricing in which retail firms intermediate trade between producers and consumers. An important facet of our analysis is that the labor-cost share of retail production differs across goods and services in the consumption basket. For example, the price of gasoline at the retail pump is...

Data for sperm numbers as a paternity guard in a wild bird

Melissah Rowe, Annabel Van Oort, Lyanne Brouwer, Jan T. Lifjeld, Michael S. Webster, Joseph F. Welklin & Daniel T. Baldassarre
Sperm competition is thought to impose strong selection on males to produce competitive ejaculates to outcompete rival males under competitive mating conditions. Our understanding of how different sperm traits influence fertilization success, however, remains limited, especially in wild populations. Recent literature highlights the importance of incorporating multiple ejaculate traits and pre-copulatory sexually selected traits in analyses aimed at understanding how selection acts on sperm traits. However, variation in a male’s ability to gain fertilization success...

Data from: The microbiota influences the Drosophila melanogaster life history strategy

Amber Walters, Rachel C Hughes, Tanner B. Call, Carson J. Walker, Hailey Wilcox, Samara C. Petersen, Seth M. Rudman, Peter D. Newell, Angela E. Douglas, Paul S. Schmidt & John M. Chaston
Organisms are locally adapted when members of a population have a fitness advantage in one location relative to conspecifics in other geographies. For example, across latitudinal gradients, some organisms may trade off between traits that maximize fitness components in one, but not both, of somatic maintenance or reproductive output. Latitudinal gradients in life history strategies are traditionally attributed to environmental selection on an animal's genotype, without any consideration of the possible impact of associated microorganisms...

eDNA metabarcoding in lakes to quantify influences of landscape features and human activity on aquatic invasive species prevalence and fish community diversity

Lilian Pukk, Jeannette Kanefsky, Amanda Heathman, Ellen Weise, Lucas Nathan, Seth Herbst, Nicholas Sard, Kim Scribner & John Robinson
Aim: Our goal was to use eDNA metabarcoding to characterize fish community diversity, detect aquatic invasive species (AIS), and assess how measures of community (or AIS) diversity are influenced by lake physical and environmental covariates, measures of hydrological connectivity, and human accessibility. Location: Michigan, USA. Methods: eDNA samples collected from 22 lakes were sequenced using two mitochondrial gene regions (12S and 16S rRNA). Metabarcoding data were compared to traditional fisheries survey data for a subset...

Data from: The anatomy, taphonomy, taxonomy and systematic affinity of Markuelia: Early Cambrian to Early Ordovician scalidophorans

Xi-Ping Dong, Stefan Bengston, Neil J. Gostling, John A. Cunningham, Thomas H. P. Harvey, Artem Kouchinsky, Anatoly K. Val'kov, John E. Repetski, Marco Stampanoni, Federica Marone & Philip C. J. Donoghue
Markuelia is a vermiform, annulated introvertan animal known as embryonic fossils from the Lower Cambrian to Lower Ordovician. Analysis of an expanded and revised dataset for Introverta shows that the precise position of Markuelia within this clade is dependent on the taxa included. As a result, Markuelia is assigned to the scalidophoran total group to reflect uncertainty as to whether it is a stem-scalidophoran or a stem-priapulid. The taxonomy of the genus is revised to...

Data from: Parallel genome-wide fixation of ancestral alleles in partially outcrossing experimental populations of Caenorhabditis elegans

Christopher H. Chandler
Experimental evolution studies, coupled with new advances in DNA sequencing technology, have become a powerful tool for exploring how populations respond to selection at the genomic level. Recent experiments in microbes typically have found evidence for multiple novel mutations, which are usually fixed. In contrast, in animal model systems, evolutionary responses seem to involve more modest changes in the frequencies of pre-existing alleles, probably because these populations outcross and are usually initialized with greater levels...

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