The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform

Michael J Conroy - One of the best experts on this subject based on the ideXlab platform.

  • tetranucleotide microsatellite loci from the black bear Ursus americanus
    Molecular Ecology Resources, 2009
    Co-Authors: Jamie S Sanderlin, Brant C Faircloth, Brian M Shamblin, Michael J Conroy
    Abstract:

    We describe primers and polymerase chain reaction conditions to amplify 21 tetranucleotide microsatellite DNA loci in black bears (Ursus americanus). We tested primers using individuals from two populations, one each in Georgia and Florida. Among individuals from Georgia (n = 29), primer pairs yielded an average of 2.9 alleles (range, one to four) and an average observed heterozygosity (HO) of 0.50 (range, 0.00 to 0.79). Among individuals from Florida (n = 19), primer pairs yielded an average of 5.7 alleles (range, one to 14) and an HO of 0.55 (range, 0.00 to 1.00). A comparison of previously developed markers with individuals from Georgia suggests that bear populations in Georgia and Florida have reduced allelic diversity relative to other populations.

Jamie S Sanderlin - One of the best experts on this subject based on the ideXlab platform.

  • tetranucleotide microsatellite loci from the black bear Ursus americanus
    Molecular Ecology Resources, 2009
    Co-Authors: Jamie S Sanderlin, Brant C Faircloth, Brian M Shamblin, Michael J Conroy
    Abstract:

    We describe primers and polymerase chain reaction conditions to amplify 21 tetranucleotide microsatellite DNA loci in black bears (Ursus americanus). We tested primers using individuals from two populations, one each in Georgia and Florida. Among individuals from Georgia (n = 29), primer pairs yielded an average of 2.9 alleles (range, one to four) and an average observed heterozygosity (HO) of 0.50 (range, 0.00 to 0.79). Among individuals from Florida (n = 19), primer pairs yielded an average of 5.7 alleles (range, one to 14) and an HO of 0.55 (range, 0.00 to 1.00). A comparison of previously developed markers with individuals from Georgia suggests that bear populations in Georgia and Florida have reduced allelic diversity relative to other populations.

J. P. Dubey - One of the best experts on this subject based on the ideXlab platform.

  • Seroprevalence of Toxoplasma gondii From Free-Ranging Black Bears (Ursus americanus) From Florida
    Journal of Parasitology, 2011
    Co-Authors: D. L. Chambers, Joseph M Guthrie, W. A. Ulrey, O. C. H. Kwok, D. S. Maehr, J. P. Dubey
    Abstract:

    Abstract: Toxoplasma gondii is a significant worldwide parasitic protozoan. In the present study, prevalence of antibodies of T. gondii was examined from 29 free-ranging black bears (Ursus americanus) from south-central Florida where the host species was listed as state threatened during this project. Overall T. gondii prevalence was found to be 44.8%, specifically 46.2% in male and 43.8% in female U. americanus, using a modified agglutination test (1∶25 titer). Seroprevalence differences between sexes were not significant (P > 0.05). Results of the present study add supportive data to the growing body of evidence suggesting that U. americanus has one of the highest T. gondii seroprevalences among all known intermediate hosts. In addition, our data emphasize the importance of understanding parasitic disease dynamics from a conservation perspective.

  • A New Species of Sarcocystis (Apicomplexa: Sarcocystidae) from the Black Bear (Ursus americanus)
    Journal of Parasitology, 2008
    Co-Authors: J. P. Dubey, J. G. Humphreys, D. Fritz
    Abstract:

    Infection with Sarcocystis species is common in herbivores but is rare in bears. Histological sections of 374 black bears (Ursus americanus) from Pennsylvania were examined for sarcocysts. In total, 3 sarcocysts were found in 3 bears, with 1 sarcocyst per section. Sarcocysts from 2 bears were considered a new species, Sarcocystis Ursusi. Sarcocysts of S. Ursusi n. sp. were microscopic and contained only bradyzoites. By light microscopy, the sarcocyst wall was thin (

  • a new species of sarcocystis apicomplexa sarcocystidae from the black bear Ursus americanus
    Journal of Parasitology, 2008
    Co-Authors: J. P. Dubey, J. G. Humphreys, D. Fritz
    Abstract:

    Infection with Sarcocystis species is common in herbivores but is rare in bears. Histological sections of 374 black bears (Ursus americanus) from Pennsylvania were examined for sarcocysts. In total, 3 sarcocysts were found in 3 bears, with 1 sarcocyst per section. Sarcocysts from 2 bears were considered a new species, Sarcocystis Ursusi. Sarcocysts of S. Ursusi n. sp. were microscopic and contained only bradyzoites. By light microscopy, the sarcocyst wall was thin (<0.5 μm thick) and had minute serrations. Ultrastructurally, the serrations on the sarcocyst wall consisted of villar protrusions (Vp) that were mostly 0.5 μm long. The Vp had bundles of electron-dense microtubules that were as wide as long; these microtubules extended deep into the ground substance layer, a feature that distinguished this species from unnamed sarcocysts from black bear. Bradyzoites were 4.8–6.0 μm long. The sarcocyst from the third bear was structurally different from S. Ursusi; its sarcocyst wall was approximately 2 μm thick ...

Christopher S Deperno - One of the best experts on this subject based on the ideXlab platform.

Ricardo G Maggi - One of the best experts on this subject based on the ideXlab platform.