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Registros recuperados: 12
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Capybara (Hydrochoerus hydrochaeris) distribution in agroecosystems: a cross-scale habitat analysis. Repositório Alice
FERRAZ, K. M. P. M. de B.; FERRAZ, S. F. de B.; MOREIRA, J. R.; COUTO, H. T. Z.; VERDADE, L. M..
Tipo: Separatas Palavras-chave: Capybara; Hydrochoerus hydrochaeris; Scale; Brasil; Agroecosistema; Distribuição espacial; Agroecosystems; Brazil; Spatial distribution.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/188254
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Detectability of capybaras in forested habitats Biota Neotropica
Pinto,Gustavo Romeiro Mainardes; Ferraz,Kátia Maria Paschoaletto Micchi de Barros; Couto,Hilton Thadeu Zarate do; Verdade,Luciano Martins.
Direct count has been commonly used as an abundance index to estimate wildlife population size. However, systematic errors in sample-based estimators are common in sampling animal populations. At this study we aimed to estimate capybara's observability, through a detectability index in forested habitats. Sampling surveys of capybaras population was obtained by direct count (abundance index) and also by complete count (census). The average detectability index of capybaras in forested habitats was 0.63 ± 0.32 for a single observer. The variability in the detectability index among habitats was due to the presence of more or less dense vegetation. This information might be useful for management purposes of the species in the agroecosystems of southeastern...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hydrochoerus hydrochaeris; Capybara; Abundance index; Direct count; Detectability index.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032006000100008
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Feeding habits of capybaras (Hydrochoerus hydrochaeris, Linnaeus 1766), in the Ecological Reserve of Taim (ESEC - Taim) - south of Brazil BABT
Borges,Lucélia do Valle; Colares,Ioni Gonçalves.
The aim of this study was to determine feeding habitats of capybaras in the ESEC-Taim (RS, Brazil), using microhistological analyses of feces. Data were analyzed seasonally. In 172 samples analyzed, 17 species were identified, with predominance of Poaceae. Zizaniopsis bonariensis was the most frequent species in winter (38%), spring (32%) and summer (26.5%) and Paspalum disthichum in fall (31.5%). A observed increase in vegetation consumption during summer might be due to the food quality. Capybaras showed an opportunistic behavior in the winter and summer and a more selective behavior in spring and fall. Capybaras from the ESEC-Taim varied diet according to the season and alimentary availability.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Capybara; Rodent; Herbivory; Diet; Poaceae.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000300007
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Gastrintestinal helminths of capybara (Hydrochoerus hydrochaeris, Linnaeus, 1766) in Cattle Breeding Farm in the area of the Ecological Reserve of Taim, Rio Grande BABT
Sinkoc,Afonso Lodovico; Brum,João Guilherme Werner; Muller,Gertrud.
The aim of this study was we observe the prevalence, intensity and mean intensity of theinfection by gastrintestinal helminths in capybaras. The helminths collected resulted in the following relationship with their respective prevalence and mean intensities of infection: Strongyloides sp. - 62.55% and 168.67; Protozoophaga obesa - 95.83% and 2698.26; Vianella hydrochoeri - 70.83% and 83.82; Hydrochoerisnema anomalobursata - 58.33% and 57.86; Capillaria hydrochoeri - 83.33% and 35.25; Trichuris spp. - 50.00% and 36.58; Hippocrepis hippocrepis - 62.50% and 22.40; Taxorchis schistocotyle - 12.50% and 2.33; Hydrochoeristrema cabrali - 45.83% and 10.73; Monoecocestus hydrochoeri - 50,00% and 28.25 and Monoecocestus jacobi - 41.67% and 5.40. The helminths M....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hydrochoerus hydrochaeris; Helminths; Capybara.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000200009
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Interbular space characterization in adult capybara (Hydrochoerus hydrochaeris) testis BABT
Paula,Tarcízio Antônio Rego de; Matta,Sérgio Luiz Pinto da; Silva Jr.,Valdemiro Amaro da; Costa,Deiler Sampaio; Fonseca,Cláudio Cesar; Neves,Marco Túlio David das.
This study aimed at the qualitative and quantitative characterization of the different intertubular tissue components in adult male capybara. Testes of 15 adult capybaras from a commercial slaughterhouse of wild animals were used. The average percentage of Leydig cells was 32.95 ± 10.03 %, whereas in the other components of the intertubular space it was 14.95 ± 4.79 %, thus the whole intertubular space totalized 47.91 ± 11.48 %. The average weight of the testes were 32.83 ± 4.78g, while the animals' body weight were around 52.37 kg and the gonadosomatic and leydigosomatic indexes were 0.125 ± 0.02% and 0.0411 ± 0.0148% respectively. It was concluded that the leydigosomatic index of the capybaras was lower than the one observed in rats, as well as the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Intertubular space; Leydig cell; Testis; Capybara; Hydrochoerus hydrochaeris.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000200014
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Life cycle of female ticks of Amblyomma cooperi Nuttal & Warburton, 1908 (Acari: Ixodidae) under laboratory conditions Arq. Bras. Med. Vet. Zootec.
Almeida,A.T.S.; Daemon,E.; Faccini,J.L.H..
The biological cycle of female ticks of Amblyomma cooperi was studied under controlled conditions. The study has begun with two engorged females collected in a naturally infested wild capybara. The larvae originated from the oviposition of these two females were used for collecting young adults through artificial infestations in rabbits. The female parasitic and free living phases were evaluated using artificial infestation of ticks in a capybara. The average body weight of females was 958.2± 175.6mg, the average pre-egg laying period was 8.5± 1.4 days, the reproductive efficiency index was 59.5± 4.2 and the nutritional efficiency index was 77.3± 4.8. The incubation and eclosion periods were 41.9 and 5.9 days, respectively, and the rate of eclosion was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tick; Amblyomma cooperi; Life cicle; Capybara.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352001000300008
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MANDIBULAR ALLOMETRY IN HYDROCHOERUS HYDROCHAERIS (LINNAEUS, 1766) (HYDROCHERINAE, CAVIIDAE) Pap. Avulsos de Zool. (São Paulo)
PARÉS-CASANOVA,PERE MIQUEL.
ABSTRACT The mammalian masticatory apparatus is a highly plastic region of the skull and thus subjected to singular ontogenetic trajectories. Here we present the first descriptive allometric pattern study of mandible among the capybara (Hydrochoerus hydrochaeris), based on the study of 37 specimens. Allometric changes in shape were analyzed using geometric morphometrics techniques and the pattern of allometry was visualized. A multivariate regression of the shape component on size, estimated by the logarithm of centroid size, appeared as highly significant. Therefore, a major component of shape variation in these mandibles is related to the attainment of adult size (i.e., growth).
Tipo: Info:eu-repo/semantics/article Palavras-chave: Capybara; Jaw; Ontogeny; Rodentia; Scaling.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492017003500451
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Natural infections with filarioidea nematodes in Hydrochaerus hydrochaeris in the floodplain of Mato Grosso do Sul, Brazil Braz. J. Vet. Res. Anim. Sci.
NASCIMENTO,Adjair Antonio do; BONUTI,Marcos Roberto; TEBALDI,José Hairton; MAPELI,Elaine Bernardo; ARANTES,Isaú Gouveia.
From 36 capybaras, slaughtered between 1989 and 1996, 11 young, less than 6 months old, and 25 adults, in the floodplain region of Mato Grosso do Sul, 570 Filarioidea nematodes were collected. Three hundred and ninety-four specimen of Cruorifilaria tuberocauda were collected from the renal arteries (380) and from pulmonary arteries (14) and 176 specimen of Yatesia hydrochoerus from the fasciae of skeleptical muscles, mainly from the obliquus externus abdominis region and from the internal faces of hind limbs.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nematoda; Filarioidea; Capybara; Hydrochaerus hydrochaeris.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962000000200003
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Seasonal Spatial Distribution Patterns Of A Capybara (Hydrochoerus Hydrochaeris) Population In The Flooded Savannas Of Colombia Mastozool. neotrop.
Maldonado-Chaparro,Adriana; Sánchez Palomino,Pedro.
Little is known about spatial induced processes regulating population dynamics in capybara (Hydrochoerus hydrochaeris), a social rodent from the lowlands of South America, an aspect that may explain the causative mechanism involved in a spatial density-dependent process like mortality and dispersal. We investigated and compared the spatial pattern of herds in a capybara population in the eastern savannas of Colombia. Herd locations were mapped during two contrasting periods of the year and changes in herd spatial distribution were measured using scale-dependent point pattern analyses, pair correlation function g(r) and the normalize K-function, (L(r)). Our results show that 1) herd size increases during the dry season; 2) herd spatial distribution followed...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Capybara; L-function; Pair Correlation Function; Point Pattern Analysis; Spatial distribution patterns.
Ano: 2010 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832010000200004
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Serological identification of Rickettsia spp from the spotted fever group in capybaras in the region of Campinas - SP - Brazil Ciência Rural
Souza,Celso Eduardo de; Souza,Savina Silvana Lacerra de; Lima,Virgília Luna Castor; Calic,Simone Berger; Camargo,Maria Cecilia Gibrail Oliveira; Savani,Elisa San Martin Mouriz; D'Auria,Sandra Regina Nicoletti; Linhares,Arício Xavier; Yoshinari,Natalino Hajime.
Diseases transmitted by ticks have been an important health problem all over the world. Brazilian Spotted Fever (BSF) stands for a serious epidemiological concern due to the high mortality rates pointed out. Capybaras are commonly incriminated as possible reservoirs in the BSF transmission cycle. In the last decades the numbers of these animals raised sharply and they have invaded human areas. They intensify the contact between ticks and humans beings. This study aim is to contribute to the possible role performed for this rodent in the BSF epidemiology in some areas located in Campinas region, São Paulo. Cabybaras infected by rickettsiae of BSF group were studied through the analysis of the frequencies of BSF-group rickettisae antibodies titer = 64 by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Rickettsia; Amblyomma; Hydrochoerus hydrochaeris; Capybara; Spotted Fever.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782008000600031
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Testosterone level, nasal gland volume and Leydig cell morphometry in capybaras (Hydrochoerus hydrochaeris) Arq. Bras. Med. Vet. Zootec.
Costa,D.S.; Paula,T.A.R..
The testosterone levels with nasal gland volume and Leydig cell morphometry in sexually mature capybaras were compared using 10 adult capybaras, aging 28 months. Body and testicular weight were 50kg and 28g, respectively. The gonadosomatic index was 0.11±0.02%, while nasal gland volume was 34.12±13.04ml. Serum testosterone concentration was 25.07±14.73ng/ml. Leydig cell volume density and leydigosomatic index were, respectively, 28.8±8.3% and 0.030±0.007%. Total and individual Leydig cell volumes were 6.88±1.92ml and 2,228.14±272.59x10-12ml, respectively. Leydig cell numbers per testis and per gram of testis were, respectively, 3,079.4±719.9x10(6) and 115.09±31.78x10(6) cells. These results show that increase in serum testosterone concentration is...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Capybara; Testosterone; Morphometry; Leydig cells; Nasal gland.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352006000600017
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The population ecology of capybaras (Hydrochaeris hydrochoeris) and their management for conservation in brazilian Amazonia. Repositório Alice
MOREIRA, J. R.; MAcDONALD, D. W..
Presented at Meeting held London, 1993. Resumo.
Tipo: Separatas Palavras-chave: Preservação; Capybara; Management; Preservation.; Capivara; Ecologia; Manejo; População.; Amazonia; Ecology; Population..
Ano: 1993 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/396472
Registros recuperados: 12
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