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Showing 1 to 20 of 43 for “"rodentia"”.
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Experimental trichinosis in Octodon degus (Rodentia)
Octodon degus occurs abundantly in an endemic trichinosis area of Chile. However, Trichinella spiralis, the etiologic agent for trichinosis has not been reported as a natural or laboratory parasite of O. degus. In this study, degus were found to be susceptible to doses of T. spiralis as low as 20 …
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Um estudo de Proechimys (Rodentia, Echimyidae) do Amapá
Proechimys cuvieri with a caryotype of 2N = 28 from Amapá Territory was studied comparatively with a sample from the same location. The morphometric univariate and multivariate analysis done for the samples showed an ocurrence of another morphospecies in the region. The study indicates the …
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The Analysis of a Substrate Preference of PEROMYSCUS (Rodentia: Cricetidae)
<p>The preference for a rocky situation was analyzed under laboratory conditions. In three-compartmented choice boxes, Peromyscus californicus and P. eremicus chose a compartment with rocks and a sandy floor over a compartment with just a sandy floor but P. maniculatus did not show a preference. In …
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Chromosomal Evolution of the Cotton Rats, Genus Sigmodon (Rodentia, Muridae)
Made available in DSpace on 2014-12-14T16:11:16Z (GMT). No. of bitstreams: 1 7820925.pdf: 5076424 bytes, checksum: 08c88bb7fa626ece254c9e6aa5182594 (MD5) Previous issue date: 1978
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Delimitating Species Boundaries within the Liomys Pictus- Spectabilis Complex (Rodentia: Heteromyidae)
Previous studies based on morphological, allozymic and mitochondrial sequence data have indicated that Liomys pictus is paraplyletic relative to L. spectabilis. The purpose of this study was to determine the species boundaries that exist within this complex. I estimated phylogenetic relationships …
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Variação morfométrica e citogenética em Kerodon rupestris (Wied, 1820) (Rodentia: Caviidae)
Kerodon rupestris Wied, 1820) is a specie of caviídeo bearer of great corporal proportions and considered a habitat specialist inside of the group. Since the Pleistocene this specie has had its space distribution restricted to the Brazilian semi-arid area where is confined to rock islands. Three …
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A Taxonomic Review of the Mantled Ground Squirrels (Rodentia: Spermophilus: Callospermophilus)
Made available in DSpace on 2014-12-12T01:27:42Z (GMT). No. of bitstreams: 1 7317482.pdf: 5532948 bytes, checksum: 0e1ed774ec704302d7755edb362835cb (MD5) Previous issue date: 1972
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Variabilidade morfológica e status taxonômico das amostras populacionais do gênero Clyomys (Rodentia: Echimyidae)
The genus Clyomys has included two living species, C. laticeps (Thomas, 1909) and C. bishopi Avila-Pires & Wutke, 1981. The first nominal form would range from the Paraguayan Chaco to the states of Minas Gerais and Bahia throughout the Brazilian Cerrado, while the second is known only for regions …
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Biochemical investigations of the evolution and systematics of certain pocket mice (Rodentia: Heteromyidae)
Several of the twenty or more species of pocket mice of the subfamily Perognathinae are questionable as to their systematic status and relationship to other species. In this study, three such species are examined. Perognathus amplus and P. longimembris are so similar in morphology and karyotype …
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Diferenciação craniana infraespecífica em Proechimys iheringi Thomas e Proechimys dimidiatus (Guenter) (Mammalia: Rodentia: Echimyidae)
The genus Proechimys is one of the most diversified groups among the neotropical rodents, and also one of the most poorly understood. This genus was subdivided by Moojen (1948) into two subgenera , namely the subgenus Proechimys and the subgenus Trinomys on the basis of the length of the main fold …
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Disminución en tamaño poblacional y asimetría fluctuante en OCTODON BRIDGESI (RODENTIA), TAXÓN ESPECIALISTA DE HÁBITAT
Doctora en Ciencias Biológicas con mención en Ecología y Biología Evolutiva
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Intraspecific and Interspecific Agonistic Behavior in Chipmunks, TAMIAS MERRIAMI, T. OBSCURUS, and T. SPECIOSUS (Rodentia: Sciuridae)
<p>Agonistic behavior in three species of chipmunks, Tamias merriami, T. obscurus, and T. speciosus, was compared at seven locations in the San Bernardino and San Jacinto Mountains of southern California. The study was conducted during the post-breeding periods in the summers of 1983 and 1984. …
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Biosystematics and Life Histories of the PEROMYSCUS GUARDIA Group of Mice and PEROMYSCUS EREMICUS (Rodentia: Cricetidae)
<p>The purpose of this project was to investigate the taxonomic relationship and the biology of Peromyscus eremicus, and the Peromyscus guardia group of mice from islands in the Gulf of California.</p> <p>Hybridization experiments were conducted between P. eremicus and P. interparietalis ryckmani. …
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Restricciones dietarias y digestivas sobre la tasa metabólica basal en un herbívoro pequeño, Octodon degus (Rodentia: octodontidae)
La calidad energética y nutricional del alimento, afecta los mecanismos de adquisición y gasto de energía. El objetivo de esta tesis, es someter a prueba estas hipótesis en forma experimental y a un nivel intraespecifico, utilizando como modelo al roedor caviomorfo herbívoro (octodon degus)
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Pup ontogeny and factors influencing behavioural and morphological variation in naked mole-rats, Heterocephalus glaber (Rodentia, Bathyergidae)
A long term behavioural study was undertaken on laboratory-reared naked mole-rats. The main objective of the study was to provide a detailed qualitative and quantitative description of the behavioural and morphological development of naked mole-rats from birth through to adulthood. This study laid …
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Estrutura da variação craniana em populações de Bolomys lasiurus (Lund, 1841) (Rodentia: Cricetidae) do Nordeste do Brasil
Cranial variability within and among populations of the akodont rodent Bolomys lasiurus from Northeastern Brazil is investigated. ln a first step, the correlation structures between tooth wear and suture ossification indexes are evaluated to access possible effects of sex, vegetation, season and …
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Functional anatomy, osteogenesis and bone microstructure of the appendicular system of African mole-rats (Rodentia: Ctenohystrica: Bathyergidae)
In comparison to their ecophysiological and behavioral aspects, the skeletal system of African mole-rats (Bathyergidae) has been relatively understudied. Only a few studies have assessed their skeletal system, but these have mostly focused on their cranial and dental systems, with little attention …
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Small mammal community structure (Rodentia: Muridae) in Punda Maria, Kruger National Park, South Africa : Causes and consequences
The population dynamics of small mammal populations in Punda Maria, Kruger National Park, South Africa was investigated with respect to community size and structure, seed predation and dispersal of several trees. Species populations, community structure and habitat attributes were measured at six …
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