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A comparison of three methods to estimate variations in the relative abundance of moutain vizcachas (Lagidium viscacia) in the High Andes ecosystems Mastozool. neotrop.
Lucherini,Mauro; Reppucci,Juan I.; Luengos Vidal,Estela.
Mountain vizcachas are large rodents that constitute the main prey of the High Andes meso-carnivores. We compared the line transect pellet count, observation rate and photographic rate methods to estimate the relative abundance of Mountain vizcachas in the High Andes ecosystems. Although a more formal validation based on the comparison with true abundances is desirable, our results suggested that these simple and affordable indices are promising methods, especially if protocols and sampling efforts are carefully standardized. We recommend the use of photographic rates, which are likely to provide the most reliable estimates, especially where Mountain vizcachas are active at night.
Tipo: Info:eu-repo/semantics/report Palavras-chave: Andean cat; Camera trapping; Direct counts; Fecal pellet counts; Rodents.
Ano: 2009 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832009000100020
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A radiographic method to estimate lung volume and its use in small mammals Biol. Res.
CANALS,MAURICIO; OLIVARES,RICARDO; ROSENMANN,Mario.
In this paper we develop a method to estimate lung volume using chest x-rays of small mammals. We applied this method to assess the lung volume of several rodents. We showed that a good estimator of the lung volume is: V*L = 0.496 · V RX ≈ 1/2·V RX , where V RX is a measurement obtained from the x-ray that represents the volume of a rectangular box containing the lungs and mediastinum organs. The proposed formula may be interpreted as the volume of an ellipsoid formed by both lungs joined at their bases. When that relationship was used to estimate lung volume, values similar to those expected from allometric relationship were found in four rodents. In two others, M. musculus and R. norvegicus, lung volume was similar to reported data, although...
Tipo: Journal article Palavras-chave: Lung volume; X-ray; Method; Rodents.
Ano: 2005 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602005000100006
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Alguns aspectos sobre roedores domésticos e seu controle em construções rurais. Infoteca-e
CAJUEIRO, I.V. de M..
1989
Tipo: Circular Técnica (INFOTECA-E) Palavras-chave: Roedor; Rato; Construção rural; Controle biológico; Controle físico; Controle químico; Rodents; Mice; Biological control; Physical control; Chemical control.
Ano: 1989 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/10073
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ANTAGONISM AGAINST VIBRIO CHOLERAE BY BACTERIAL DIFFUSIBLE COMPOUND IN THE FECAL MICROBIOTA OF RODENTS Rev. Microbiol.
Silva,Simone Helena da; Vieira,Enio Cardillo; Nicoli,Jacques Robert.
In an ex vivo agar plate assay, we monitored the appearance of an inhibitory halo against Vibrio cholerae from the feces of Wistar and Fischer rats aged 10 to 42 days. The frequency of Wistar rats showing halo increased from 0% (10 days) to a maximum of 80.0% (29 days) and then decreased to 53.3% (42 days). A similar pattern was obtained with Fischer rats but with a lower intensity (maximum frequency of 50.0% by day 36). In a separate experiment, when Wistar rats were fed a low-protein diet for 7 days, the inhibitory halo decreased drastically. Three apparently different colony morphologies were isolated from the dominant fecal microbiota: a facultative anaerobe (FAN) and two strict anaerobes (SAN). The ex vivo inhibitory test showed a halo around the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vibrio cholerae; Escherichia coli; Streptococcus intermedius; Antagonism; Rodents.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141998000300016
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Arthropods and helminths assemblage in sigmodontine rodents from wetlands of the Río de la Plata, Argentina Mastozool. neotrop.
Navone,Graciela T.; Notarnicola,Juliana; Nava,Santiago; Robles,M. del Rosario; Galliari,Carlos; Lareschi,Marcela.
The assemblage of arthropods and helminths, present in sigmodontine rodents (Cricetidae) from a broad wetland area of the Río de la Plata, Argentina, was studied. A total of 250 sigmodontines were captured during a two-year sampling period: Scapteromys aquaticus and Oxymycterus rufus were the most abundant hosts, followed by Oligoryzomys nigripes, Akodon azarae, Oligoryzomys flavescens, and Deltamys kempi. There were 33102 parasites collected, corresponding with Rhopalopsyllidae fleas (Siphonaptera), Hoplopleuridae lice (Phtiraptera), Laelapidae and Macronyssidae mites, Ixodidae ticks, and Trombiculidae chiggers (Acari), the trematodes Echinostomidae, Microphallidae, and Dicrocoelidae, the flatworm Ciclophyllidea, the nematods Trichuridae, Spiruridae,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ectoparasites; Endoparasites; Río de La Plata; Rodents; Wetlands.
Ano: 2009 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832009000100011
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Canaania obesa (Platyhelminthes: Dicrocoeliidae): redescription and new hosts records Rev. Bras. Zool.
Maldonado Junior,Arnaldo; Pinheiro,Jairo; Simões,Raquel de O.; Lanfredi,Reinalda M..
The digenetic trematode Canaania obesa Travassos, 1944 (Dicrocoeliidae) was described as a parasite of the bile ducts of the rodent Akodon cursor Winge, 1887 (Cricetidae) collected in Santa Teresa, state of Espírito Santo, Brazil. In the present study, we report the occurrence of C. obesa infecting three additional sigmodontinae rodent species: Akodon montensis Thomas, 1913; Oligoryzomys nigripes Olfers, 1818 and Nectomys squamipes Brants, 1827, from three municipalities situated at Serra dos Órgãos, Rio de Janeiro, Brazil. Scanning electron microscopy showed that this helminth has a leaf-like shape with conical extremities and the ventral mid body protrudes at the acetabulum level. The microtopography of the tegument shows a heterogeneous surface with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bile ducts; Digenetic; Rodents; Sigmodontine; Trematode.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000500015
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Cardiovascular assessment in Female Spotted Paca ( Cuniculus paca ) Arq. Bras. Med. Vet. Zootec.
Almeida,V.T.; Uscategui,R.A.R.; Restan,W.A.Z.; Feliciano,M.A.R.; Ortiz,E.M.; Kawanami,A.E.; Barros,F.F.P.C.; Santos,V.J.C.; Vicente,W.R.R..
ABSTRACT Aiming to provide cardiovascular morphophysiology information on the Cuniculus paca, an important neotropical rodent, eight healthy adult females of this species were evaluated three times by echocardiography under general anesthesia with isoflurane every 15 days. The exams were performed by a single experienced evaluator with the animals positioned in right and left decubitus. Posteriorly, two expert evaluators measured the cardiac chambers, walls and flow patterns, by B-mode, M-mode, and Doppler ultrasonography. The resulting values were compared among evaluators and periods by the Bland-Altman agreement test and several descriptive statistics were presented for each parameter. Echocardiographic images were obtained between the second and fifth...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Echocardiography; Rodents; Neotropical; Wildlife.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000100061
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Community structure and population dynamics of small mammals in an urban-sylvatic interface area in Rio de Janeiro, Brazil Rev. Bras. Zool.
Gentile,Rosana; Cardoso,Thiago S.; Costa-Neto,Sócrates F.; Teixeira,Bernardo R.; D’Andrea,Paulo S..
ABSTRACT The Atlantic Forest is one of the most disturbed Brazilian biomes, with 183 out of 298 species of mammals occurring in the state of Rio de Janeiro. In this study, we aimed to characterize the diversity, community structure, and habitat use of small mammals in the FIOCRUZ Atlantic Forest Campus (CFMA), including areas of Pedra Branca State Park (PBSP, subunit Pau da Fome), state of Rio de Janeiro. We also compared species diversity and composition between two moments 15 years apart (2001 and 2012-2015) and analyzed the population dynamics of the marsupial Didelphis aurita (Wied-Neuwied, 1826). Small mammal captures were made in different habitats: sylvatic-urban interface areas near human dwellings, disturbed forest, and preserved forest areas....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Atlantic Forest; Diversity; Habitat disturbance; Marsupials; Rodents.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702018000100323
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Comunidade de pequenos mamíferos de paisagens nativas e pastagens cultivadas no Pantanal da Nhecolândia. Repositório Alice
COELHO, A. G. DE A.; ANTUNES, P. C.; OLIVEIRA-SANTOS, L. G. R.; TOMAS, W. M.; BORDIGNON, M. O..
O Pantanal possui uma grande diversidade de habitats, compondo uma paisagem complexa que tem sido conservada pela pecuária tradicional. Mais recentemente, a implantação de pastagem cultivada, visando ao aumento da produtividade e intensificando o sistema de produção vem alterando a paisagem pantaneira. Os resultados dessa alteração é a simplificação da composição e da complexidade da paisagem, colocando em risco a biodiversidade regional. O objetivo deste estudo foi avaliar alterações na comunidade de pequenos mamíferos em diferentes fitofisionomias, inclusive área alterada, em duas Fazendas no Pantanal da Nhecolândia. The Pantanal presents a great habitat diversity composing a complex landscape which has been conserved by the traditional cattle ranching....
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Bracchiaria; Desmatamento; Extinção; Marsupiais; Pecuária; Roedores; Cattle ranching; Deforestation; Extinction; Marsupials; Rodents.
Ano: 2010 URL: http://www.alice.cnptia.embrapa.br/handle/doc/868294
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Current status of rice pests and their management in Assam, India- a discussion with extension agents International Rice Research Institute
Islam, Z.; Heong, K. L.; Bell, M.; Hazarika, L. K.; Rajkhowa, D. J.; Ali, S.; Dutta, B. C.; Bhuyan, M..
p.95-97
Palavras-chave: Pests; Insect pests; Diseases; Weeds; Rodents; Pest control; India.
Ano: 2004 URL: http://hdl.handle.net/123456789/1084
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Cytogenetics and redescription of Graomys (Rodentia, Sigmodontinae) from Chumbicha, Catamarca, Argentina Mastozool. neotrop.
Lanzone,Cecilia; Novillo,Agustina; Suárez,Natalia S.; Ojeda,Ricardo A..
The taxonomy, phylogenetic relationships and distribution of the genus Graomys are confusing. In this note we report karyotypic data for specimens of Graomys collected in Chumbicha, Catamarca Province, Argentina. Their karyotypes agree with G. centralis with 2n = 42. The individuals from Chumbicha are similar in morphology to G. griseoflavus but smaller. Our results suggest that Chumbicha's specimens are conspecific with G. medius. Moreover, we propose to synonymize G. medius with G. centralis. Other data of the genus suggest that the name G. chacoensis should be applied to specimens with 2n = 42.
Tipo: Info:eu-repo/semantics/report Palavras-chave: Chromosomes; Morphometry; Phyllotine; Rodents; Taxonomy.
Ano: 2007 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832007000200009
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Desenvolvimento de grama-tio-pedro sob sombreamento nativo e recebendo adubação líquida. Repositório Alice
SOUSA, E. L. de.; PAIVA, L. M.; FERNANDES, H. J.; DECHNES, J. P.; JANUSCKIEWICZ, E. R.; SANTOS, S. A..
O sombreamento das pastagens proporciona melhores índices zootécnicos na produção animal, ao considerar a condição ambiental onde solo, plantas e animais podem ser favorecidos em suas potencialidades. O objetivo com este trabalho foi estudar o desenvolvimento de grama-tio-pedro (Paspalum oteroi) recebendo doses de adubo líquido, sob sombreamento.
Tipo: Artigo em anais de congresso (ALICE) Palavras-chave: Paspalum Oteroi; Forrageira nativa; Sombreamento de pastagens; Roedor; Comportamento Animal; Morfogênese; Rodents; Animal behavior; Pantanal.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1090670
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Diversity and habitat preference of medium and large-sized mammals in an urban forest fragment of southwestern Amazon Iheringia, Sér. Zool.
Borges,Luiz H. M.; Calouro,Armando. M.; Botelho,André L. M.; Silveira,Marcos.
We assessed the species composition and abundance of medium and large-sized mammals in an urban forest fragment in the Brazilian Amazon, and recorded the preference of some species for particular phytophysiognomies. We placed nine transects with 20 sand plots each in three phytophysiognomies: open rainforest with a dominance of bamboos (OFB), open rainforest with palm trees (OFP), and dense rainforest (DF). We calculated species abundance as the number of records/plot.day, in a total of 2,700 plots.day. We recorded twelve mammal species; Sylvilagus brasiliensis (Linnaeus, 1758) and Dasyprocta fuliginosa (Wagler, 1831) were the most abundant. The results differed among phytophysiognomies: DF presented the highest mammal diversity, whereas the species...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Acre; Sand plot; Rodents; 'tapiti'; Palm tree.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212014000200006
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Dustbathing and intra-sexual communication of social degus, Octodon degus (Rodentia:Octodontidae) RChHN
EBENSPERGER,LUIS A..
I observed the behavior of captive male and female Octodon degus to assess if dustbathing behavior plays a role in social communication among unfamiliar, same-sex conspecifics. Degus of a first group (control responders) were individually exposed during 10-min tests to an arena containing loose, clean soil. I compared the latency to first dustbathing as well as the overall frequency of dustbathing events recorded to control responders with the corresponding figures recorded to a second group of degus (experimental responders) after they were individually introduced into the same arena but with soil previously used for dustbathing by a same-sex conspecific (depositor). I also compared the location of dustbathing events by experimental responders with that...
Tipo: Journal article Palavras-chave: Sandbathing; Scent communication; Rodents.
Ano: 2000 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000200011
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Ecology of small mammals in a Brazilian rural area Zoologia
D'Andrea,Paulo Sergio; Gentile,Rosana; Cerqueira,Rui; Grelle,Carlos Eduardo V; Horta,Claudia; Rey,Luis.
A small mammal study was carried out in Pamparrão valley, Sumidouro, State of Rio de Janeiro, Brazil, from June 1991 to July 1996. The area was characterised by small rural properties with vegetable plantations, pasture lands and small forest fragments. Small mammals were captured in seven line transects along the valley. Eleven small mammal species were captured: the didelphid marsupials Didelphis aurita, Philander frenata and Monodelphis americana, and the rodents Nectomys squamipes, Akodon cursor, Oligoryzomys nigripes, Bolomys lasiurus, Oecomys concolor (Sigmodontinae), Rattus ratlus (Murinae), Proechimys iheringi and Euryzygo-matomys guiara (Echimyidae). The heterogeneous habitat configuration probably allowed the occurrence of marsupials and more...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Marsupials; Rodents; Cultivated areas; Brazil.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000300002
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Efficacy of anticoagulant drugs as rodenticides and genetic variation on Vkorc1 of Mus musculus from Buenos Aires province (Argentina) JBAG
Espinosa,M.B.
The relationship between anticoagulant rodenticides and the gene for vitamin K epoxide reductase has been extensively studied The significance of mutations in Vkorc1 on the degree of response to anticoagulants is controversial. The implication of the VKORC1 function in pest control drives the attention to a wide range of factors that may be influencing the resistance to rodenticides, an issue that will be discussed in this article. Anticoagulants are used as rodenticides as well as to improve human health. The interactions between VKORC1 and CYP4F18 (cytochrome P450) are complex. It is likely that the coagulation response may be due to a diverse expression of the Vkorc1 gene and its interaction with the expression of Cyp4f18, and to the polymorphisms...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vitamin K epoxide reductase; Rodenticides; Rodents.
Ano: 2013 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1852-62332013000100004
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Efficiency of four trap types in sampling small mammals in forest fragments, Mato Grosso, Brazil Mastozool. neotrop.
Santos-Filho,Manoel; da Silva,Dionei J.; Sanaiotti,Tânia M..
We sampled the small mammal community inhabiting semi-deciduous forest fragments in Mato Grosso, Brazil, using 4 different types of traps, Tomahawk, Sherman, snap, and pitfall, in order to evaluate the efficiency of different trap types in sampling efforts. During our study, we captured a total of 984 individuals of 27 species over 33 800 trap/nights. Sherman traps captured a significantly greater abundance of individuals and higher species richness than the other 3 types of traps. The Tomahawk and snap traps exhibited similar capture rates, in both the number of individuals and species captured. Pitfall traps captured the fewest numbers of individuals and species and were the only trap type to have different, although not significant, capture rates...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Marsupials; Mato Grosso; Rodents; Semi-deciduous forest fragments; Traps.
Ano: 2006 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-93832006000200005
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Efficiency of small mammal trapping in an Atlantic Forest fragmented landscape: the effect of trap type and posiiton, seasonality and habitat. Repositório Alice
VIEIRA, A. L. M.; PIRES, A. S.; NUNES-FREITAS, A. F.; OLIVEIRA, N. M.; RESENDE, A. S. de; CAMPELLO, E. F. C..
2014
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Armadilha de queda; Roedores; Marsupiais; Pitfall traps; Rodents; Marsupials.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/999894
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Environmental and dam effects on cannibalism in Wistar rat litters Biological Sciences
Tarôco, Graziela; Gaya, Leila de Genova; Resende, Daniela Regina; Santos, Ivan Carlos dos; Madureira, Ana Paula.
The factors related to cannibalistic behavior of dams in a Wistar rat colony are identified and analyzed. The maternal genetic effects were tested as a random effect by the method of generalized linear models. The season at parturition, the dam´s age at parturition and the density of the room at parturition were tested as fixed effects, whereas the litter size at birth was tested as a co-variable. The genetic effect of the dam was significant for the number of cannibalized pups. Although the season at parturition, the dam´s age and room density on the day of parturition were not individually significant (p > 0.05), most of the interactions between the variation sources were significant (p < 0.05). Cannibalism occurred mostly in dams aged over 241...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Laboratory animals; Maternal behavior; Infanticide; Rodents laboratory animals; Maternal behavior; Infanticide; Rodents.
Ano: 2015 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/23015
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ENVIRONMENTAL ENRICHMENT DURING EARLY POSTNATAL DEVELOPMENT DECREASES PARVALBUMIN EXPRESSION IN THE RAT SOMATOSENSORY CORTEX International Journal of Morphology
Inzunza,Oscar; Bravo,Hermes; Fernández,Víctor.
In the rat brain, parvalbumin (PV) expression starts on postnatal day 8 and comprises a heterogeneous population of nonpyramidal GABAergic neurons. In the present work, an immunohistochemical study was done on control and experimental rats submitted to enriched environmental conditions between postnatal days 3 to 18 or 3 to 24. Counts of PV+ neurons were made in the dorsomedial and in the ventrolateral regions of the somatosensory cortex. In control animals, PV+ neurons reached a peak on day 24 declining towards day 120. In these rats a peculiar distribution pattern was detected in which immunoreactive neurons are more numerous in the dorsomedial than ventrolateral regions as well in infragranular than supragranular layers and in posterior regions than...
Tipo: Journal article Palavras-chave: Neuropeptide PV; Cerebral cortex; Polysensorial stimulation; Rodents; Immunohistochemistry.
Ano: 2003 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022003000300001
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