Sloths
Mostrando 1-12 de 29 artigos, teses e dissertações.
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1. A review of the Quaternary Scelidotheriinae (Mammalia, Xenarthra, Tardigrada) from the Tarija-Padcaya basin, Bolivia
ABSTRACT The Mylodontidae Scelidotheriinae (Mammalia, Xenarthra, Tardigrada) are a diversified clade of South American fossil ground sloths, with a wide geographic distribution, especially in high and middle latitudes. According to the last revision, the Quaternary diversity includes the genera Scelidotherium, Catonyx, and Valgipes. The clade Scelidotheriina
An. Acad. Bras. Ciênc.. Publicado em: 16/04/2018
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2. Sloths of the Atlantic Forest in the sixteenth and seventeenth centuries
RESUMO Preguiças foram itens de curiosidade para os europeus nos séculos XVI e XVII e várias descrições existem em bestiários e textos daquela época. Aqui, nós trazemos as descrições e desenhos de preguiças feitas por viajantes e naturalistas daqueles séculos para a Mata Atlântica brasileira. As preguiças eram uma novidade para o público europ
An. Acad. Bras. Ciênc.. Publicado em: 15/08/2016
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3. Mammalian chromosome evolution: comparative studies by chromosome painting on two sloth species of Bradypodidae family and two marsupial species / Evolução cromossômica em mamíferos: estudos comparativos por pintura cromossômica em duas espécies de preguiças da família Bradypodidae e em duas espécies de marsupiais da família Didelphidae
In an attempt to shed additional light on mammalian karyotype evolution, we studied, by chromosome painting, the chromosomes of species from two mammalian basal groups, sloths and marsupials. We compared human chromosomes with the chromosomes of two species of three-toed sloths, Bradypus torquatus and Bradypus variegatus, establishing homologies. Analyzing t
Publicado em: 2009
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4. Novel 12S mtDNA findings in sloths (Pilosa, Folivora) and anteaters (Pilosa, Vermilingua) suggest a true case of long branch attraction
We sequenced 12S RNA mtDNA for the majority of the extant species of sloths and anteaters and compared our results with previous data obtained by our group using 16S RNA mtDNA in the same specimens and to GenBank sequences of the extinct giant sloth Mylodon. Our results suggest that pigmy-anteaters may be a case of the long-branch attraction phenomenon and a
Genetics and Molecular Biology. Publicado em: 2008
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5. Contextualização taxonômica, tafonômica e morfométrica dos remanescentes ósseos da megamastofauna da Gruta Cuvieri (MG), um sítio paleontológico do Pleistoceno tardio / Taxonomic, taphonomic and morphometric contextualization of the megamastofauna bone remains from Cuvieri Cave (MG), a Late Pleistocene Palaeontological Site.
The limited knowledge regarding the Brazilian megafauna (due to a mainly taxonomist tradition of brazilian paleontologists) and the lack of controlled stratigraphic excavations of paleontological sites in Brazil motivated the excavations of Cuvieri Cave, Minas Gerais, using an unprecedented method of excavation in the country, based on detailed exhumation of
Publicado em: 2008
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6. Ritmo biolÃgico da temperatura corporal em preguiÃas (Bradypus variegatus)
Sloths are heterothermal mammals showing a mean Body Temperature (BT) of around 33ÂC, and behavioral responses possibly related with the light-dark cycle (LD) and ambient temperature. Reports on studies regarding BT rhythmicity during the 24h period are inconclusive. The aim of the present study was to characterize the biological rhythm of BT in Bradypus va
Publicado em: 2007
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7. A simple protocol for the extraction and sequence analysis of DNA from study skin of museum collections
Museum collections have been widely used as sources of biological samples for molecular biology studies and there are several methodologies and techniques to obtain and analyze DNA from tissues archived in museums, but most of these protocols have been developed for a specific tissue or are commercial kits. We present a simple protocol for extracting and amp
Genetics and Molecular Biology. Publicado em: 2007
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8. DIETA DO GAVIÃO-REAL Harpia harpyja (Aves: Accipitridae) EM FLORESTAS DE TERRA FIRME DE PARINTINS, AMAZONAS, BRASIL
This study analyzed the diet of the Harpy Eagle (Harpia harpyja), including the influences of seasonality and land cover (forest vs. deforested) in a 3 km buffer around nests, and the frequency of occurrence and biomass of prey delivered to nestlings and fledglings. The nests were located in areas of lowland forest in settlements of Villa Amazônia (INCRA).
Publicado em: 2007
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9. Fecal estradiol and progesterone metabolite levels in the three-toed sloth (Bradypus variegatus)
The present study was carried out to assess the possibility of measuring fecal steroid hormone metabolites as a noninvasive technique for monitoring reproductive function in the three-toed sloth, Bradypus variegatus. Levels of the estradiol (E2) and progesterone (P4) metabolites were measured by radioimmunoassay in fecal samples collected over 12 weeks from
Brazilian Journal of Medical and Biological Research. Publicado em: 2006-02
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10. Perfil hematimÃtrico e identificaÃÃo da hemoglobina do bicho preguiÃa Bradypus variegatus
The objective of the present study was to carry out hematimetric profile and identify the types of hemoglobin (Hb) present in the blood of the sloth, Bradypus variegatus, evaluating the influence of sex over these parameters. The present study was carried out in ten sloths (6 male and 4 female), unanaesthetized, kept in a restricted area, weighting (XÂSD) 3
Publicado em: 2006
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11. Aspectos clínicos e de manejo de preguiça-de-garganta- marron Bradypus variegatus (Schinz, 1825) de vida livre na Mesorregião Metropolitana do Recife, Pernambuco, Brasil
Objetivou-se com este trabalho realizar alguns estudos relacionados ao manejo, fisiologia e aspectos sanitários em uma população de preguiças-de-garganta-marrom (Bradypus variegatus) de vida livre na Estação Ecológica de Caetés, Mesorregião Metropolitana do Recife, PE, Brasil. O estudo foi realizado em duas etapas distintas. A primeira consistiu na
Publicado em: 2006
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12. Electrocardiographic studies of the three-toed sloth, Bradypus variegatus
Electrocardiograms (ECG) obtained with standard limb leads and augmented unipolar limb leads were recorded from 17 unanesthetized adult sloths. The animals were held in their habitual position in an experimental chair. We determined heart rate and rhythm from the R-R intervals, the amplitude and duration of each wave, and the duration of the segments and int
Brazilian Journal of Medical and Biological Research. Publicado em: 2005-12