Navegando por Palavras-chave "natural history"

Agora exibindo 1 - 3 de 3
  • Imagem de Miniatura
    Item
    Acesso aberto (Open Access)
    On the habitat use of the Neotropical whip spider Charinus asturius (Arachnida: Amblypygi)
    (Soc Brasileira Zoologia, Univ Federal Parana, 2018) Segovia, Julio M. G.; Neco, Lucia C.; Willemart, Rodrigo H. [UNIFESP]
    The non-random occupation of habitats is termed habitat selection. Some species of whip spiders select trees with burrows at their base, while others use substrates such as rocks. Here, we investigated the habitat use by Charinus asturius Pinto-da-Rocha, Machado & Weygoldt, 2002, an endemic species of Ilhabela Island in Brazil. We found that C. asturius is more likely to be found under rocks that cover larger areas of substrate. Our results also suggest the existence of territorialism in C. asturius and show that C. asturius adults may be found again on the same rock a week later. Additionally, our data show that C. asturius is present in a greater area of Ilhabela than previously documented.
  • Nenhuma Miniatura disponível
    Item
    Somente Metadadados
    Rebiopsy in patients with untreated hepatitis C: A useful procedure
    (Lippincott Williams & Wilkins, 2006-04-01) Khouri, Sandra Tuma [UNIFESP]; Perez, R. M.; Oliveira, P. M. de; Figueiredo, V. M.; Barbosa, D. V.; Lanzoni, V. P.; Silva, AEB; Ferraz, M. L.; Universidade Federal de São Paulo (UNIFESP); Universidade Federal do Rio de Janeiro (UFRJ)
    Background: the progression of fibrosis in the early stages of chronic hepatitis C virus is variable, and the ideal interval to perform a new biopsy in untreated patients is still unknown.Aims: We evaluated the histologic progression of patients with untreated hepatitis C virus with two liver biopsies and correlated disease progression with demographic, epidemiologic, biochemical, and histologic variables.Patients and Methods: Untreated hepatitis C virus-infected patients with two liver biopsies at a minimum interval of 1 year were studied. Gender, age, parenteral risk factors, duration of infection, alcohol intake, alanine aminotransferase, aspartate aminotransferase, gamma-glutamyltransferase, and histologic findings were analyzed.Results: Fifty-five patients were included. the first biopsy showed low grades of fibrosis and periportal necroinflammatory activity in 93%. A second biopsy was performed after 39 +/- 14 months; 40% of patients showed a progression of fibrosis and/or periportal necroinflammation. Comparison between groups with and without histologic worsening revealed no differences in demographic, epidemiologic, biochemical, or histologic data.Conclusions: Histologic worsening occurred in 40% of untreated patients after 3.2 years. No factor could be established at the first biopsy to predict which patients are at risk of progression. Thus, histologic reassessment between 3 and 5 years seems to be the only approach to document disease progression and establish treatment indication.
  • Nenhuma Miniatura disponível
    Item
    Somente Metadadados
    Some aspects of the natural history of the casque-headed tree frog Corythomantis greeningi Boulenger (Hylidae)
    (Elsevier B.V., 1999-07-01) Jared, C.; Antoniazzi, M. M.; Katchburian, E.; Toledo, R. C.; Freymuller, E.; Inst Butantan; Universidade Federal de São Paulo (UNIFESP)
    Corythomantis greeningi, a casque-headed tree frog, was studied in the field and in captivity. This species belongs to a monotypic genus, and together with other species of anurans, possesses a differentiated head which is flat, very rough and presenting cranial co-ossification with the skin. These are characteristics that are usually associated with phragmotic behaviour which is supposed to have a role in water saving and protection against predators. Observations were focused on the characteristics of the species which make it adapted to life in the Brazilian semi-arid (caatinga). Data about the body and external anatomy of the head, integument morphology, life, reproduction, interest for sheltering and defense against desiccation is presented. Finally, it is proposed that adaptation of this species to the dry environment is probably the result of the synergism of a number of different strategies against water loss, including phragmosis. (C) 1999 Editions scientifiques et medicales Elsevier SAS.