2 Works

Data from: Early breeding females experience greater telomere loss

Jessica L. Graham, Carolyn M. Bauer, Britt J. Heidinger, Ellen D. Ketterson & Timothy J. Greives
Annual reproductive success is often highest in individuals that initiate breeding early, yet relatively few individuals start breeding during this apparently optimal time. This suggests that individuals, particularly females who ultimately dictate when offspring are born, incur costs by initiating reproduction early in the season. We hypothesized that increases in the aging rate of somatic cells may be one such cost. Telomeres, the repetitive DNA sequences on the ends of chromosomes, may be good proxies...

Data from: Seasonally sympatric but allochronic: differential expression of hypothalamic genes in a songbird during gonadal development

Carolyn M. Bauer, Adam M. Fudickar, Skylar Anderson-Buckingham, Mikus Abolins-Abols, Jonathan W. Atwell, Ellen D. Ketterson & Timothy J. Greives
Allochrony, the mismatch of reproductive schedules, is one mechanism that can mediate sympatric speciation and diversification. In songbirds, the transition into breeding condition and gonadal growth is regulated by the hypothalamic-pituitary-gonadal (HPG) axis at multiple levels. We investigated whether the difference in reproductive timing between two, seasonally sympatric subspecies of dark-eyed juncos (Junco hyemalis) was related to gene expression along the HPG axis. During the sympatric pre-breeding stage, we measured hypothalamic and testicular mRNA expression...

Registration Year

  • 2018
    2

Resource Types

  • Dataset
    2

Affiliations

  • Adelphi University
    2
  • Indiana University Bloomington
    2
  • North Dakota State University
    2