Artigos Científicos - CBRAG

URI Permanente para esta coleçãohttps://repositorio.ufpa.br/handle/2011/8051

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Agora exibindo 1 - 9 de 9

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Licófitas e samambaias da Serra do Itauajuri, município de Monte Alegre, Pará, Brasil
(Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 2016-12) GÓES, Julieta Pallos Pinto de Araújo; GÓES NETO, Luiz Armando de Araújo; COSTA, Jeferson Miranda; SOUZA, Filipe Soares de; SILVA, Marcio Roberto Pietrobom da
In this study we present the lycophytes and ferns inventoried in the Serra do Itauajuri, Pará state. Sixty four species distributed in 36 genera and 21 families were registered, with one family, one genus, and four species belonging to the lycophytes lineage, and 20 families, 35 genera, and 60 species belonging to the ferns lineage. The most representative families were Pteridaceae (19 spp.), Polypodiaceae (8), and Selaginellaceae (4). The genera with highest species richness were Adiantum (9 spp.) and Selaginella (4). Most species were collected as terrestrial (35 spp., ca. 55%), occurring in riparian forests (51 spp., ca. 80%), with American distribution pattern (46 spp., ca. 72%). We present two new records for the Northern Region of Brazil (Asplenium pumilum and Marsilea ancylopoda) and two for Pará state (Ophioglossum nudicaule and Selaginella minima). The studied area has distinct environmental characteristics than those commonly observed in Brazilian Amazonia, being a biologically important area. This results gathered information that can support the creation and implementation of the Serra do Itauajuri Conservation Unit, which will guarantee the preservation of its historic and natural wealth.
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Hymenophyllaceae (Polypodiopsida) na mesorregião metropolitana de Belém, Estado do Pará, Brasil
(Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 2015-09) SILVA, Gisele Teixeira da; SILVA, Marcio Roberto Pietrobom da
Hymenophyllaceae (Polypodiopsida) from the Metropolitan Mesoregion of Belém, State of Pará, Brazil. In Brazil as well as in the Brazilian Amazon, most information regarding to Hymenophyllaceae is contained in floristic surveys and there are few specific studies to the family. This work presents a floristic treatment of filmy ferns from Metropolitan Mesoregion of Belem. We recorded 19 species belonging to the genera Didymoglossum (6 spp.),Hymenophyllum (3 spp.), Polyphlebium (1 sp.) and Trichomanes (9 spp.) that correspond to about 60% of filmy ferns from Pará. Trichomanes crispum and T. vittaria are new records to the studied area. The cities of Belém and Santa Barbara do Pará have greater species richness probably due to the ecological parks and to concentrate studies in these areas. Keys to the genera and species as well as descriptions, taxonomic comments, geographic distributions data, types of vegetation, substratum and illustrations are given.
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Licófitas (Lycopodiophyta) do corredor de biodiversidade do norte do Pará, Brasil
(Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 2015-03) GÓES NETO, Luiz Armando de Araújo; ROSÁRIO, Sebastião Maciel do; SILVA, Marcio Roberto Pietrobom da; VALDESPINO, Iván Alberto
A treatment of the lycophytes of the Northern Pará Biodiversity Corridor within the Guiana Endemism Center is presented. This article is part of the project “Diagnóstico da Biodiversidade das Unidades de Conservação estaduais do Mosaico Calha Norte, Estado do Pará”. The treatment includes keys as well as species descriptions. In the study area 14 species distributed in four genera (Palhinhaea, Phlegmariurus, Pseudolycopodiella and Selaginella) were registered. The most diverse genus was Selaginella with 10 species, of which S. fragilis A. Braun and S. revoluta Baker are new records for Pará, and S. gynostachya Valdespino and S. sandwithii Alston are reported here as new to the Brazilian flora.
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Dryopteridaceae e Lomariopsidaceae (Polypodiopsida) do Campo Experimental da Embrapa Amazônia Oriental, Moju, Pará, Brasil
(Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 2010-09) ROSÁRIO, Sebastião Maciel do; SILVA, Marcio Roberto Pietrobom da
This study presents the species of the families Dryopteridaceae and Lomariopsidaceae recorded at Embrapa's Eastern Amazonia Field Station. Dryopteridaceae is represented in the area by Cyclodium heterodon (Schrad.) T. Moore var. abbreviatum (C. Presl) A.R. Sm., C. inerme (Fée) A.R. Sm., C. meniscioides (Willd.) C. Presl var. meniscioides, Elaphoglossum discolor (Kuhn) C. Chr., E. flaccidum (Fée) T. Moore, E. laminarioides (Bory ex Fée) T. Moore, E. luridum (Fée) H. Christ, E. obovatum Mickel and E. styriacum Mickel. Lomariopsidaceae is represented by Lomariopsis prieuriana Fée, Nephrolepis biserrata (Sw.) Schott, N. brownii (Desv.) Hovenkamp & Miyam. and N. rivularis (Vahl) Mett. ex Krug. Identification keys for genera and species, descriptions, illustrations, geographical distributions and habitat data are presented.
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Samambaias e licófitas do Parque Ecológico do Gunma, município de Santa Bárbara do Pará, estado do Pará, Brasil
(Instituto de Pesquisas Jardim Botânico do Rio de Janeiro, 2010-06) COSTA, Jeferson Miranda; SILVA, Marcio Roberto Pietrobom da
The Gunma Ecological Park - PEG (Santa Bárbara do Pará, Pará state, Brazil) is one of the few preserved forest remnants in the metropolitan region of Belém. The PEG has a rich phanerogamic flora with rare species, but nothing is known about its seedless vascular-plant flora. Our aim is to present a floristic survey of ferns and lycophytes from Gunma Ecological Park. The 56 recorded species belong to 28 genera and 15 families. This is the first record for Lellingeria suspensa (L.) A.R. Sm. & R.C. Moran in Pará state and also for Polyphlebium diaphanum (Kunth) Ebihara & Dubuisson in the Brazilian Amazon. The richest families were Hymenophyllaceae (15 spp.), Dryopteridaceae (8 spp.), Polypodiaceae (7 spp.) and Pteridaceae (6 spp.). The genera with highest number of species were Trichomanes (7 spp.) and Elaphoglossum (6 spp.). The majority of the species were herbaceous (52 spp.), with epiphytic (30 spp.) and terrestrial (23 spp.) habitat, occurred exclusively in the understory (35 spp.) and presented American distribution (34 spp.). This result demonstrates the importance of Gunma Ecological Park for local/regional seedless vascular-plant flora preservation.
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First occurrence of Quadrigyrus nickoli (Acanthocephala) in the ornamental fishHyphessobrycon eques
(Colégio Brasileiro de Parasitologia Veterinária, 2013-03) FUJIMOTO, Rodrigo Yudi; ALMEIDA, Edilene Santos de; DINIZ, Daniel Guerreiro; MARTINS, Maurício Laterça; EIRAS, Jorge Costa
The objective of this work was to report the first seasonal occurrence of the acanthocephalan Quadrigyrus nickoliSchmidt & Hugghins, 1973(Quadrigyridae), in the “Mato Grosso”Hyphessobrycon eques (Characidae) (Steindachner, 1882), collected from the Chumucuí River, state of Pará, Brazil. The fish were collected between July 2006 (rainy season) and June 2007 (dry season) and were examined for parasites using pattern techniques. A total of 75 parasites were found in the stomach and intestine. Among 83 fish examined (50 in the dry season and 33 in the rainy season), 22 were parasitized by cystacanths of Q. nickoli. The importance of H. eques as a paratenic host for Q. nickoli is discussed. This is the first study on the biology of and infection by Q. nickoli occurring in the eastern Amazon region.
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Estudo comparativo de comunidades de briófitas sujeitas a diferentes graus de inundação no município de São Domingos do Capim, PA, Brasil
(Universidade Federal do Pará, 2016-06) LOPES, Moisés Oliveira; SILVA, Marcio Roberto Pietrobom da; CARMO, Dimas Marchi do; PERALTA, Denilson Fernandes
(Comparative study of communities of bryophytes in different degrees of flooding in the municipality of São Domingos do Capim, Pará State, Brazil). Third-five transects were analyzed (10 × 10 m) for the floristic survey and eighteen transects (six for each vegetation type: Igapó Forest (IG), Várzea Forest (VA), and Terra Firme Forest (TE)) were randomly analyzed in order to compare the bryophyte communities. We found 118 species: 37 mosses and 82 liverworts Lejeuneaceae (63 species) was the richest among the liverwort families to liverworts and Calymperaceae (eight species) among mosses. The estimated species richness was lower than expected, but the collector’s curve was stabilized. The most colonized substrate was live bark (101 spp., 45 exclusive) followed by decomposing bark (66 spp., 16 exclusive). The results show that the vegetation types analyzed have has differences in bryophyte community richness (IG > TF > VA) and composition, due to the occurrence of exclusive species. The cluster (UPGMA) and ordination (NMDS) analyses indicated the presence of community structure among the three phytophysiognomy.
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Molecular analyses reveal the occurrence of three new sympatric lineages of velvet worms (Onychophora: Peripatidae) in the eastern Amazon basin
(Universidade Federal do Pará, 2017-03) CUNHA, Williana Tamara Rocha da; SANTOS, Rita de Cassia Oliveira dos; SILVA, Juliana Araripe Gomes da; SAMPAIO, Maria Iracilda da Cunha; SCHNEIDER, Horacio; RÊGO, Péricles Sena do
In the present study, we investigated the possible existence of new lineages of peripatids through comparisons between known Neotropical species and specimens obtained from two locations in Pará, a state in eastern Brazilian Amazonia using a molecular approach based on sequences of the mtDNA genes COI, 16Sr RNA, and 18S RNA. The analyses included also sequences of Asian and African taxa for a more systematic understanding of the phylogenetic relationships within the group. The analysis of the COI, 16S rRNA and 18S RNA sequences permitted the identification of three distinct lineages (A, B and C) based on two different phylogenetic approaches (Bayesian methods and ML). The three lineages presented here are completely distinct from all other peripatid taxa so far defined by molecular data. The presence of specimens of three independent onychophoran lineages occurring in sympatry in the Amazon basin was confirmed in all the analyses, providing consistent support for the phylogenies presented in this study. These findings reinforce the importance of the Amazon region in the diversification of Neotropical peripatids, and indicate that onychophoran diversity is much greater than previously thought, given that the number of taxa found at a single site was equivalent to the total number of allopatric species described for the entire region.
Acesso aberto (Open Access)
Selectivity curves of the capture of mangrove crab (Ucides cordatus) on the northern coast of Brazil using bayesian inference
(Instituto Internacional de Ecologia, 2016-06) FURTADO JUNIOR, Ivan; ABRUNHOSA, Fernando Araujo; HOLANDA, Francisco Carlos Alberto Fonteles; TAVARES, Marcia Cristina da Silva
Fishing selectivity of the mangrove crab Ucides cordatus in the north coast of Brazil can be defined as the fisherman's ability to capture and select individuals from a certain size or sex (or a combination of these factors) which suggests an empirical selectivity. Considering this hypothesis, we calculated the selectivity curves for males and females crabs using the logit function of the logistic model in the formulation. The Bayesian inference consisted of obtaining the posterior distribution by applying the Markov chain Monte Carlo (MCMC) method to software R using the OpenBUGS, BRugs, and R2WinBUGS libraries. The estimated results of width average carapace selection for males and females compared with previous studies reporting the average width of the carapace of sexual maturity allow us to confirm the hypothesis that most mature individuals do not suffer from fishing pressure; thus, ensuring their sustainability.

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