915 resultados para Reptiles Amphibians


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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Bone malformation in snakes stems from inbreeding or temperature variations during gestation or incubation. Differential diagnosis are osteoarthropathy due to nutritional, metabolic and infectious diseases. For an accurate diagnosis of these changes, a radiographic exam is essential because it provides a general view of the skeleton and detects morphological abnormalities. This study aimed to report the clinical care of a rainbow boa (Epicrates cenchria crassus) with congenital kyphosis and changes in scales, from a snake pit with controlled temperature and humidity since its gestation. Multiple dorsal deviations of the column without the presence of osteoarthrosis were seen upon radiographic examination. Studies aiming to understand the cases of congenital malformation in snakes should be performed to prevent the birth of animals with this type of change.

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The leptodactylid frog Thoropa miliaris, from SE Brazil, may live on rocky marine shore, where it thrives on terrestrial and marine invertebrates, and often moves into the intertidal zone. The osmotic concentration of plasma, muscle homogenate and urine of the frogs freshly captured on the rocky shore was higher than those collected far from the sea, or kept in captivity for 6-8 months on a diet free of marine items. Increase in body urea and sodium concentrations, reported in amphibians as a response to hyperosmotic environment, was not found in T. miliaris. Osmotic concentration of the frogs from rocky shore was variable though, ranging from 400 to 980 mOsm/l. Such variation in the osmotic concentration may reflect a territorial behavior for foraging sites, which would result in higher intake of marine items by individuals living closer to intertidal zone.

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Marine turtles are reptiles that occur on the Brazilian coast and can travel very large distances between feeding and nesting grounds. Five species found in Brazil are threatened. The consumption of turtle meat and eggs is an ancient habit in many coastal communities around the world. The main causes that threaten these species are the increase in fishing and the drastic changes in the environment. The presence of turtles near the beaches and their accidental capture were reported by fishermen in the region of Cananéia, where this work was developed. This study was also made based in interviews of fishermen that living in the area and the follow up of their fishing activities. This methodology made possible to identify the turtles in the area, the behavior of the fishermen with these animals and the relation between non-commercial fishing and turtles. The fishing traps area has a direct relation with the capture of turtles. The higher incidence of turtle capture is usually next to islands, rocky coasts, low lands and bay entrances, which are areas where the most common species of the region (Chelonia mydas) normally look for food. The fishermen opinions about the critical situation of these species and their conservation has also been studied. Several programs in Environmental Education for the communities of the region have been recommended

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Hematology has a great importance in assessing the health of all animals, including reptiles, since it aids in the diagnosis of certain diseases and help to monitor patient's clinical evolution, although studies and articles in this area are rare, even with the increasing number of calls of these animals in veterinary clinics. Moreover, there are a lot of environmental and individual factors, which influence the hematological values of this group, such as age, sex, stress levels, nutrient levels and season which the exam was made, among others. For these reasons studies that aimed to evaluate the reference values of some specie, are essential to increase the knowledge in the field and to assist on the clinical approach. This paper aim’s to study the patterns of Hematology of Tortoise (Geochelone carbonaria) seeking the greater knowledge of clinical pathology of this species and increasing the possibilities for diagnosis, monitoring clinical outcome, and assessment of the general state and treatment

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The interspecific competition tends to favor the selection of divergent phenotypes minimizing the effect of this interaction. This process is termed character displacement and it is considered one of the main mechanisms promoting adaptive diversification. Brazil has the greatest diversity of amphibians on the planet and despite this great diversity; the role of character displacement in the process of Brazilian amphibian fauna diversification has not been studied. In the present study we tested the hypothesis of character displacement in four congeneric species pairs of frogs from the family Hylidae, occurring in the Atlantic Forest and Cerrado. We find evidence of character displacement for two pairs and parallel evolution for the remaining. Interestingly, the trend of character displacement was in species whose range covers less stable habitats. Since this is a pioneering study with neotropical hylid, we discussed issues considered relevant to elucidate mechanisms related to the maintenance of diversity

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Amphibians exhibit great morphological plasticity of habitat and life history. This heterogeneity contributes to the frequency of occurrence and diversity of sexual dimorphism (shape or size) is large. Dasypops schirchi is a species belonging to the subfamily and family Gastrophryninae Microhylidae and this endemic and endangered. Generally, very little is known about D. schirchi, much in part to its habit of living and cryptic small geographical distribution. In order to detect and characterize elements sexually dimorphic in this species was a survey of specimens of D. schirchi in major national zoological collections. We analyzed 16 morphometric variables were also searched and secondary sexual characters non-morphometric. Statistical analysis of the morphometric data, the results showed a clear distinction between males and females of D. schirchi, secondary sexual characters nonmorphometric were also found

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Este estudo analisou a helmintofauna presente no anfíbio anuro Thoropa taophora coletados em uma ilha do Estado de São Paulo. Foram necropsiados 16 hospedeiros e recuperados 226 parasitas, todos nematóides, pertencentes a quatro taxa de helmintos: Physaloptera sp. (Physalopteridae), encontrados no estômago; Rhabdias sp. (Rhabdiasidae), encontrados no pulmão; Oswaldocruzia sp. (Molineidae), no intestino delgado; nematóides da família Cosmocercidae, no intestino delgado e intestino grosso e uma larva de parasita identificado apenas como pertencente à Classe Nematoda. A prevalência total foi 81,25%, de animais parasitados

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Os anfíbios ocupam grande variedade de microhabitats refletindo os diversos modos reprodutivos, estilos de vida e parasitas que estes animais apresentam. Os parasitas são indicativos de muitos aspectos biológicos de seus hospedeiros, incluindo a dieta, ocupação do habitat e a filogenia, podendo também ser bons indicadores diretos do estado de qualidade ambiental. A Ilha Anchieta, parque estadual em área de Mata Atlântica, torna-se interessante para estudos biológicos devido a sua dinâmica insular e isolamento geográfico. No Brasil, a Mata Atlântica é um dos biomas mais afetados pelas atividades antrópicas e o número de helmintos recém-descobertos podem estar desaparecendo mais rapidamente do que novos organismos são descobertos. O objetivo deste estudo foi caracterizar a helmintofauna de duas espécies de anfíbios, Hypsiboas albomarginatus (n=23) e Scinax hayii (n=18), ambas pertencentes à família Hylidae, procedentes da Ilha Anchieta, São Paulo, Brasil. A helmintofauna foi composta apenas de nematoides (Rhabdias sp., Physaloptera sp.) e um espécime não identificado da família Cosmocercidae. Estudos como estes são importantes, pois os parasitas representam uma diversidade oculta, a qual contribui com a manutenção da diversidade local de hospedeiros e das funções do ecossistema

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)