Time filter

Source Type

Nossa Senhora das Dores, Brazil

Santos P.S.,Federal University of Minas Gerais | da Silva E.T.,Centro Universitario Of Caratinga | Fehlberg B.H.B.,Federal University of Minas Gerais | Santos M.T.T.,Federal University of Minas Gerais | And 2 more authors.
Check List

We report new records for the poorly known species Hylodes babax (fourth record), Dendropsophus ruschii (fourth record) and Bokermannohyla ibitipoca (fifth record), from an Atlantic Forest fragment in the eastern region of the Mantiqueira mountain range in Minas Gerais, Brazil. © 2012 Check List and Authors. Source

Rocha L.L.V.,Federal University of Vicosa | Rocha L.L.V.,Centro Universitario Of Caratinga | Neves C.A.,Federal University of Vicosa | Zanuncio J.C.,Federal University of Vicosa | Serrao J.E.,Federal University of Vicosa
Comptes Rendus - Biologies

Triatoma vitticeps (Stal, 1859) is a hematophagous Hemiptera that, although being considered wild, can be found in households, being a potential Chagas' disease vector. This work describes the histology and ultrastructure of the midgut of T. vitticeps under different starvation periods. Fifteen adults of both sexes starved for 3, 7, 20 and 25 days were studied. In general, digestive cells had apical microvilli, basal plasma membrane infoldings and central nucleus. The perimicrovillar membrane was found in all insects examined. Digestive cells of anterior midgut had lipid droplets, glycogen granules, developed basal labyrinth associated with mitochondria suggesting their role in nutrient storage and in fluid and ion transport. The cells ofmedian and posterior regions of the midgut were rich in rough endoplasmic reticulum, lysosomes, vesicles and granules with different electrondensities. Moreover, cells of the posterior portion of the midgut had hemozoyn granules and mitochondria in the apical cytoplasm close tomicrovilli, suggesting their role in blood digestion and active nutrient absorption. The midgut of T. vitticeps showed differences in digestive cells associated with the time after feeding, and the increase of vesicles amount in long starvation periods, which suggests enzyme storage, which is readily used after a blood meal. © 2010 Académie des sciences. Source

Santos P.S.,Federal University of Minas Gerais | da Silva E.T.,Centro Universitario Of Caratinga | Felhberg B.H.B.,Federal University of Minas Gerais | Santos M.T.T.,Federal University of Minas Gerais | Garcia P.C.A.,Federal University of Minas Gerais
Check List

In this study we report the first record of the giant torrent frog Megaelosia apuana in the state of Minas Gerais, southeastern Brazil. The finding of this species at Reserva Particular do Patrimônio Natural (RPPN) Mata do Sossego, municipality of Simonésia, east of Minas Gerais extends its geographic distribution by 120 km from the type locality, and 45 km northwest from its westernmost known record. A geographic distribution map is presented. © 2011 Check List and Authors. Source

Brandao P.C.,Centro Universitario Of Caratinga | Soares V.P.,Federal University of Vicosa | Simas F.N.B.,Federal University of Vicosa | Schaefe C.E.G.R.,Federal University of Vicosa | And 2 more authors.
Revista Arvore

The lack of basic studies for the elaboration of management plans has delayed the effective implementation of conservation units in the Amazon region. In this work, the interpretation of orbital and sub-orbital images, together with field surveys were used for the geoenvironmental characterization of the Purus National Forest (PNF). A georreferenced digital database composed of thematic maps was produced and constitutes the base of a GIS for the PNF. Four geoenvironments were identified and mapped: Dissecated Plateaux with forest vegetation on Latosols and Argisols; Forested slopes on Argisols; Alluvial plains with eutric soils; Alluvial plains with dystric soils. The holocenic alluviums influenced by the Purus River are eutric, and receive sub-Andenean sediments. On the other hand, most of the PNF has extremely poor and acid soils related to the Solimões Formation. Since the nutrient levels in the mineral substrate are very low, the management of these areas should seek the increment of biomass in the system, which would enhance nutrient cycling by the vegetation since the nutrient levels in the mineral substrate are very low. Source

Silva S.O.,Centro Universitario Of Caratinga | Ferreira R.L.C.,University of Pernambuco | da Silva J.A.A.,University of Pernambuco | Lira M.A.,EMBRAPA - Empresa Brasileira de Pesquisa Agropecuaria | And 3 more authors.
Revista Arvore

The objective of this work was to compare a natural regeneration of two areas with Caatinga vegetation with different histories of use in the Agreste of Pernambuco. These studies were carried out in two areas: Area l, native forest, with no historical evidences of deforestation for agriculture purposes; and Area ll, which was previously occupied with the cultivation of forage cactus and was abandoned about 30 years ago at the stage of secondary succession. For data collection, it was used a total of 24 plots of 5 x 5 m dimensions, 12 plots in each area, and considering the plants with circumference at breast height (CBH) of 1.30 m from ground (CAP) < 6.0 cm and height ≥1.0 m as individuals in natural regeneration. It was identified in the structure survey of regenerating individuals structural survey in both areas, 581 plants of 14 botanical families, 26 genus and 30 species. The total densities obtained in this study were 11,200 and 8,116 individuals.ha-1 in Area l and ll, respectively. The species with the greatest densities of natural regeneration in Area l were the following: Croton argyrophyllus, Senegalia bahiensis, Croton blanchetianus and Coutarea hexandra and in the Area ll: Senegalia bahiensis, Poincianella pyramidalis, Zanthoxyllum sp, Croton blanchetianus and Croton argyrophyllus. Source

Discover hidden collaborations