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Showing 1 to 15 of 15 for “"Sigmodon hispidus"”.
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Photoperiodic Control of Reproduction in Male Hispid Cotton Rats, Sigmodon Hispidus
The hispid cotton rat, Sigmodon hispidus, has been shown to have a seasonal reproductive cycle and may use photoperiod to regulate this cycle. Male Sigmodon were placed in differing photoperiods, and serum prolactin, testicular size, testicular mass and spermatogenic activity were measured as …
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Metabolic and Thyroidal Effects of Vinclozolin on Cotton Rats (Sigmodon Hispidus)
… were measured in wild cotton rats (Sigmodon hispidus) while being treated with a commonly used fungicide, vinclozolin. Treatments included two dosages (2.8 mg/m² and 281 mg/m²) and three treatment periods (pregnancy, lactating, and post-lactating) for a total of seven treatment …
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Investigating the Effects of Vinclozolin on Reproduction in Three Generations of Sigmodon Hispidus
Sigmodon hispidus (n=48) were trapped from four locations in Southwest Missouri. They were housed in cages in environmental chambers so that seasons could be simulated, inducing breeding. Their offspring (the PG eneration) were given the same food, but their water bottles were "spiked" with …
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Flea and Louse Infestations of Cotton Rats (Sigmodon Hispidus) In The Southeastern United States
<p>Ectoparasites were collected from cotton rats (Sigmodon hispidus) in 20 sites in the Southeastern United States (FL, GA, MS, NC and SC). Prevalence and mean intensity of parasitism by sucking lice (Anoplura) and fleas (Siphonaptera) of cotton rats were recorded at all sites. The geographical …
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An Examination of Seasonal Growth and Survivorship of <i>Sigmodon hispidus</i> in Southeastern Virginia
… of specific population dynamic aspects of <em>Sigmodon hispidus</em>, the hispid cotton rat, is necessary in order to gain additional knowledge and perspective on this species in its northernmost distribution on the east coast of the United States. Previous studies of Virginia cotton rats were …
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Life Cycle Studies of Physaloptera Hispida N. Sp. (Nematoda: Spirurata) From the Cotton Rat, Sigmodon Hispidus Littoralis, Chapman
Made available in DSpace on 2014-12-04T22:45:42Z (GMT). No. of bitstreams: 1 0001668.pdf: 3255633 bytes, checksum: bac9f41e23735ab6d29426e55e922fce (MD5) Previous issue date: 1950
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The Relationship of Small Mammal Species to Habitat Variables in West-Central Georgia and East-Central Alabama
… Peromyscus polionotus, Ochrotomys nuttalli, Sigmodon hispidus, Neotoma floridana, and Mus musculus with respect to the the sand to clay ratio, percent slope, elevation, distance to water, number of burns, number of evergreen and deciduous species, number of grass species, number of forb …
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Seasonal Energetics of the Cotton Rat (Sigmon Hispidus) From Southwest Missouri
To determine what strategies the cotton rat (Sigmodon hispidus) may employ to survive harsh winters, monthly (June, 1988 through January, 1990) measurements of metabolic rates, nonshivering thermogenesis (NST), thermal conductance, and body mass were made. In addition, serum thyroxine (T₄) levels …
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Small Mammal Habitat Associations in a Fragmented Agricultural Landscape
… mammals were captured. Peromyscus gossypinus and Sigmodon hispidus were captured most often, while shrew species and (Reithrodontomys humulis) were captured rarely. Relative species abundance per trapping effort was highest for old field and longleaf pine-wiregrass habitats. Pine plantation and …
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The Ontogeny of Thermoregulatory Abilities in Neonatal Cotton Rats and Montane Voles
… temperatures 20, 25, 30 and 35°C for cotton rat (Sigmodon hispidus) neonates and at temperatures 25, 30 and 35°C for montane vole (Microtus montanus) neonates to determine the response to cold, and to estimate the thermal neutral zone (TNZ) of each species. TNZ for cotton rats was 33-35°C and for …
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Mucosal and systemic immune responses induced by immunisation of cotton rats with recombinant adenoviruses
… against BHV-1 infection, a cotton rat (Sigmodon hispidus) model for intranasal BHV-1 challenge was developed. I used this model to assess the ability of different routes of immunisation with the recombinant adenoviruses to elicit gD-specific systemic and mucosal immunity and confer …
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Experimental studies of the ecology and evolution of eastern equine encephalitis virus and implications for its emergence and classification
… vertebrate host species. Wild cotton rats (Sigmodon hispidus) and house sparrows (Passer domesticus) were collected in Galveston and Houston, Texas, respectively, and evaluated for their potential to serve as amplification and/or reservoir hosts for NA and SA EEEV. Juvenile cotton rats …
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Entwicklung alternativer Vakizinierungsstrategien gegen Masernvirusinfektionen im Tiermodell
… Dissertation wurde gezeigt, daß Baumwollratten (Sigmodon hispidus) alternativ zum Affen ein hervorragendes Tiermodell sind, um die Immunogenität potentieller Impfstoffvektoren und ihre Effektivität in Gegenwart maternaler Antikörper zu testen. Baumwollratten sind das einzige Nagetiermodell, in …