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Sökning: WFRF:(Larkin S) > (2005-2009)

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1.
  • Elsik, Christine G., et al. (författare)
  • The Genome Sequence of Taurine Cattle : A Window to Ruminant Biology and Evolution
  • 2009
  • Ingår i: Science. - : American Association for the Advancement of Science (AAAS). - 0036-8075 .- 1095-9203. ; 324:5926, s. 522-528
  • Tidskriftsartikel (refereegranskat)abstract
    • To understand the biology and evolution of ruminants, the cattle genome was sequenced to about sevenfold coverage. The cattle genome contains a minimum of 22,000 genes, with a core set of 14,345 orthologs shared among seven mammalian species of which 1217 are absent or undetected in noneutherian (marsupial or monotreme) genomes. Cattle-specific evolutionary breakpoint regions in chromosomes have a higher density of segmental duplications, enrichment of repetitive elements, and species-specific variations in genes associated with lactation and immune responsiveness. Genes involved in metabolism are generally highly conserved, although five metabolic genes are deleted or extensively diverged from their human orthologs. The cattle genome sequence thus provides a resource for understanding mammalian evolution and accelerating livestock genetic improvement for milk and meat production.
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4.
  • Wichrowski, M.W., et al. (författare)
  • Activity and movements of reintroduced elk in Southeastern Kentucky
  • 2005
  • Ingår i: Southeastern naturalist (Steuben, Me.). - : Eagle Hill Institute. - 1528-7092 .- 1938-5412. ; 4:2, s. 365-374
  • Tidskriftsartikel (refereegranskat)abstract
    • We assessed daily and seasonal activity and movements of reintroduced elk in eastern Kentucky from March 1999 to November 2000. Elk activity was determined by monitoring radio-transmitter pulse rate changes, and movements were calculated using hourly ground locations. A total of 1469 activity bouts and 1441 locations were collected on 38 and 32 radio-collared elk, respectively. Elk exhibited a tri-modal activity pattern with peaks near dawn, dusk, and midnight. Activity did not differ between seasons, although it was influenced by gender and time of day. Peak movements corresponded with peaks in activity at dawn and dusk, and increased from spring to winter. Elk were more gregarious and visible during the fall and winter, which increased their susceptibility to human disturbance and caused longer movements.
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