Eimeria spp. (Apicomplexa: Eimeriidae) from Black- and White-Tailed Prairie Dogs (Cynomys ludovicianus and Cynomys leucurus) in Central and Southeast Wyoming

1997 ◽  
Vol 83 (1) ◽  
pp. 166 ◽  
Author(s):  
R. S. Seville

Author(s):  
Kieth Severson ◽  
Glenn Plumb

The recent black-footed ferret reintroduction into the Conata Basin area of west­central South Dakota has prompted managers of USDA Forest Service, Buffalo Gap National Grasslands and National Park Service, Badlands National Park, to reassess methods of determining population size of black-tailed prairie dogs Cynomys ludovicianus. Most agencies are currently relying on a protocol developed by Biggins et al. (1993) to assess black-footed ferret habitat, a section of which deals with prey abundance. The protocol is based on population estimates derived from counting the number of active burrows. The justification for this was a set of unpublished data that reported fair and good relationships between counts of active burrows and black- and white-tailed prairie dogs C. leucurus, respectively (Biggins et al. 1993). While there is no other correlative information relative to active burrows, Powell et al. (1994) suggested that counts of active burrows alone may not be a reliable indicator of black-tailed prairie dog populations. Menkens et al. (1988) examined relationships between populations determined by mark-recapture and total burrow counts. They reported that white­tailed prairie dog density was not significantly related to burrow density and was not a useful predictor of population density. However, Fagerstone and Biggins (1986) and Menkens et al. (1990) reported high correlation coefficients when comparing visual counts of white-tailed prairie dogs with mark-recapture densities. The purpose of this study was to examine relationships among population estimates from mark-recapture techniques with visual counts, active burrow counts, and total burrow counts derived by ground and aerial surveys all within the same experimental design.



Viruses ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 606
Author(s):  
Molly D. Butler ◽  
Karen Griffin ◽  
Connie D. Brewster ◽  
Marylee L. Kapuscinski ◽  
Mark D. Stenglein ◽  
...  

As part of research and wildlife disease surveillance efforts, we performed necropsy examinations of 125 free-ranging (n = 114) and captive (n = 11) prairie dogs in Colorado from 2009 to 2017. From these cases, we identified three cases of thymic lymphoma in free-ranging Gunnison’s prairie dogs (Cynomys gunnisoni), and we identified a novel retroviral sequence associated with these tumors. The viral sequence is 7700 nucleotides in length and exhibits a genetic organization that is consistent with the characteristics of a type D betaretrovirus. The proposed name of this virus is Gunnison’s prairie dog retrovirus (GPDRV). We screened all 125 prairie dogs for the presence of GPDRV using PCR with envelope-specific primers and DNA extracted from spleen samples. Samples were from Gunnison’s prairie dogs (n = 59), black-tailed prairie dogs (Cynomys ludovicianus) (n = 40), and white-tailed prairie dogs (Cynomys leucurus) (n = 26). We identified GPDRV in a total of 7/125 (5.6%) samples including all three of the prairie dogs with thymic lymphoma, as well as spleen from an additional four Gunnison’s prairie dogs with no tumors recognized at necropsy. None of the GPDRV-negative Gunnison’s prairie dogs had thymic lymphomas. We also identified a related, apparently endogenous retroviral sequence in all prairie dog samples. These results suggest that GPDRV infection may lead to development of thymic lymphoma in Gunnison’s prairie dogs.





1927 ◽  
Vol 8 (2) ◽  
pp. 110 ◽  
Author(s):  
George Edwin Johnson


2017 ◽  
Vol 79 (6) ◽  
pp. 979-983 ◽  
Author(s):  
Isao MATSUMOTO ◽  
James Kenn CHAMBERS ◽  
Yasutsugu MIWA ◽  
Hiroyuki NAKAYAMA ◽  
Kazuyuki UCHIDA


2004 ◽  
Vol 22 (3) ◽  
pp. 204-209 ◽  
Author(s):  
K. Bly-Honness ◽  
J. C. Truett ◽  
D. H. Long


1984 ◽  
Vol 78 (2) ◽  
pp. 279-283 ◽  
Author(s):  
Garry M Wallace ◽  
Fevold H.R ◽  
E.W Pfeiffer


1988 ◽  
Vol 69 (3) ◽  
pp. 611-614 ◽  
Author(s):  
D. W. Foltz ◽  
J. L. Hoogland ◽  
G. M. Koscielny


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