4 Works

Data from: Nuclear and mitochondrial sequence data reveal and conceal different demographic histories and population genetic processes in Caribbean reef fishes

Ron I Eytan & Michael E Hellberg
Mitochondrial and nuclear sequence data should recover historical demographic events at different temporal scales due to differences in their effective population sizes and substitution rates. This expectation was tested for two closely related coral reef fish, the tube blennies Acanthemblemaria aspera and A. spinosa. These two have similar life histories and dispersal potentials, and co-occur throughout the Caribbean. Sequence data for one mitochondrial and two nuclear markers were collected for 168 individuals across the species'...

Data from: A test of the chromosomal rearrangement model of speciation in Drosophila pseudoobscura

Kirsten M. Brown, Lisa M. Burk, Loren M. Henagan & Mohamed A. F. Noor
Recent studies suggest that chromosomal rearrangements play a significant role in speciation by preventing recombination and maintaining species persistence despite interspecies gene flow. Factors conferring adaptation or reproductive isolation are maintained in rearranged regions in the face of hybridization, while such factors are eliminated from collinear regions. As a direct test of this rearrangement model, we evaluated the genetic basis of hybrid male sterility in a sympatric species pair, Drosophila pseudoobscura pseudoobscura and D. persimilis,...

Data from: Ecological partitioning among parapatric cryptic species

Alice Dennis & Michael Hellberg
Geographic range differences among species may result from differences in their physiological tolerances. In the intertidal zone, marine and terrestrial environments intersect to create a unique habitat, across which physiological tolerance strongly influences range. Traits to cope with environmental extremes are particularly important here because many species live near their physiological limits and environmental gradients can be steep. The snail Melampus bidentatus occurs in coastal salt marshes in the western Atlantic and the Gulf of...

Data from: Genetic evidence for high propagule pressure and long-distance dispersal in monk parakeet (Myiopsitta monachus) invasive populations

Anders Gonçalves Da Silva, Jessica Eberhard, Timothy Wright, Michael Avery & Michael Russello
The monk parakeet (Myiopsitta monachus) is a successful invasive species that does not exhibit life history traits typically associated with colonizing species (e.g., high reproductive rate or long-distance dispersal capacity). To investigate this apparent paradox, we examined individual and population genetic patterns of microsatellite loci at one native and two invasive sites. More specifically, we aimed to evaluate the role of propagule pressure, sexual monogamy, and long-distance dispersal in monk parakeet invasion success. Our results...

Registration Year

  • 2010
    4

Resource Types

  • Dataset
    4

Affiliations

  • Louisiana State University
    4
  • New Mexico State University
    1
  • United States Department of Agriculture
    1
  • University of British Columbia
    1