8 Works

Data from: Oxidative damage increases with reproductive energy expenditure and is reduced by food-supplementation

Quinn E. Fletcher, Colin Selman, Stan Boutin, Andrew G. McAdam, Sarah B. Woods, Arnold Y. Seo, Christiaan Leeuwenburgh, John R. Speakman & Murray M. Humphries
A central principle in life-history theory is that reproductive effort negatively affects survival. Costs of reproduction are thought to be physiologically-based, but the underlying mechanisms remain poorly understood. Using female North American red squirrels (Tamiasciurus hudsonicus), we test the hypothesis that energetic investment in reproduction overwhelms investment in antioxidant protection, leading to oxidative damage. In support of this hypothesis we found that the highest levels of plasma protein oxidative damage in squirrels occurred during the...

Data from: Maintaining functional major histocompatibility complex diversity under inbreeding: the case of a selfing vertebrate

A. Ellison, J. Allainguillaume, S. Girdwood, J. Pachebat, K. M. Peat, P. Wright, Sofia Consuegra Del Olmo & S. Consuegra
Major histocompatibility complex (MHC) genes encode proteins that present pathogen-derived antigens to T-cells, initiating the adaptive immune response in vertebrates. Although populations with low MHC diversity tend to be more susceptible to pathogens, some bottlenecked populations persist and even increase in numbers despite low MHC diversity. Thus, the relative importance of MHC diversity versus genome-wide variability for the long-term viability of populations after bottlenecks and/or under high inbreeding is controversial. We tested the hypothesis that...

Data from: A unified anatomy ontology of the vertebrate skeletal system

Wasila M. Dahdul, James P. Balhoff, David C. Blackburn, Alexander D. Diehl, Melissa A. Haendel, Brian K. Hall, Hilmar Lapp, John G. Lundberg, Christopher J. Mungall, Martin Ringwald, Erik Segerdell, Ceri E. Van Slyke, Matthew K. Vickaryous, Monte Westerfield & Paula M. Mabee
The skeleton is of fundamental importance in research in comparative vertebrate morphology, paleontology, biomechanics, developmental biology, and systematics. Motivated by research questions that require computational access to and comparative reasoning across the diverse skeletal phenotypes of vertebrates, we developed a module of anatomical concepts for the skeletal system, the Vertebrate Skeletal Anatomy Ontology (VSAO), to accommodate and unify the existing skeletal terminologies for the species-specific (mouse, the frog Xenopus, zebrafish) and multispecies (teleost, amphibian) vertebrate...

Data from: Glacial cycles as an allopatric speciation pump in North Eastern American freshwater fishes

Julien April, Robert H. Hanner, Anne-Marie Dion-Côté & Louis Bernatchez
Allopatric speciation may be the principal mechanism generating new species. Yet, it remains difficult to judge the generality of this process because few studies have provided evidence that geographic isolation has triggered the development of reproductive isolation over multiple species of a regional fauna. Here, we first combine results from new empirical data sets (7 taxa) and published literature (9 taxa) to show that the eastern Great Lakes drainage represents a multispecies suture zone for...

Data from: Testing models of sex ratio evolution in a gynodioecious plant: female frequency covaries with the cost of male fertility restoration

Christina Marie Caruso & Andrea L. Case
In many gynodioecious species, cytoplasmic male sterility genes (CMS) and nuclear male fertility restorers (Rf) jointly determine whether a plant is female or hermaphrodite. Equilibrium models of cytonuclear gynodioecy, which describe the effect of natural selection within populations on the sex ratio, predict that the frequency of females in a population will primarily depend on the cost of male fertility restoration, a negative pleiotropic effect of Rf alleles on hermaphrodite fitness. Specifically, when the cost...

Data from: Lobelia siphilitica plants that escape herbivory in time also have reduced latex production

Amy L. Parachnowitsch, Christina M. Caruso, Stuart A. Campbell & Andre Kessler
Flowering phenology is an important determinant of a plant’s reproductive success. Both assortative mating and niche construction can result in the evolution of correlations between phenology and other reproductive, functional, and life history traits. Correlations between phenology and herbivore defence traits are particularly likely because the timing of flowering can allow a plant to escape herbivory. To test whether herbivore escape and defence are correlated, we estimated phenotypic and genetic correlations between flowering phenology and...

Data from: Mitochondrial DNA (COI) analyses reveal that amphipod diversity is associated with environmental heterogeneity in deep-sea habitats

Matthew Knox, Ian Hogg, Conrad Pilditch, Anne-Nina Lörz, Paul Hebert, Dirk Steinke, Matthew A. Knox, Ian D. Hogg, Conrad A. Pilditch & Paul D. N. Hebert
The relationship between species diversity and environmental parameters is poorly understood for the mobile macrofauna of deep-sea habitats due to under-sampling and subsequent lack of accurate taxonomic information. To redress this, cytochrome oxidase c subunit I (COI) DNA sequences were used to estimate species diversity and to compare phoxocephalid amphipod assemblages among 20 stations encompassing a range of environmental conditions. Two regions, east (Chatham Rise) and west (Challenger Plateau) of New Zealand were sampled to...

Data from: Three decades of cultural evolution in Savannah sparrow songs

Heather Williams, Iris I. Levin, D. Ryan Norris, Amy E. M. Newman, Nathaniel T. Wheelwright & Amy E.M. Newman
Cultural evolution can result in changes in the prevalence not only of different learned song types within bird populations but also of different segments within the song. Between 1980 and 2011, we examined changes within different segments of the single songs of male Savannah sparrows, Passerculus sandwichiensis, in an island population. Introductory notes did not change. The buzz segment showed similar stability; although a rare low-frequency variant appeared and then disappeared, the buzz segments from...

Registration Year

  • 2012

Resource Types

  • Dataset


  • University of Guelph
  • National Evolutionary Synthesis Center
  • University of South Dakota
  • Oregon Health & Science University
  • University of North Carolina
  • University of Waikato
  • Aberystwyth University
  • University of Alberta
  • University of Aberdeen
  • Dalhousie University