SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Souza,Sérgio F.; Sá,Nelsi C. de.

Benthic foraminifera distribution in high polluted sediments from Niterói Harbor (Guanabara Bay), Rio de Janeiro, Brazil

Ano: 2000

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652000000200017

Vilela,Claudia G.; Batista,Daniele S.; Batista-Neto,José A.; Crapez,Mirian; Mcallister,John J..

Dockyards and harbors are recognized as being important locations where sediment-associated pollutants can accumulate, which constitutes an environmental risk to aquatic life due to potential uptake and accumulation of heavy metals in the biota. The aim of this paper is to assess the concentrations and the effects of some heavy metals in the benthic foraminifera assemblage in Niterói Harbor. Low concentrations in the benthic foraminifera as well as the dominance of indicative species such as Ammonia tepida, Buliminella elegantissima and Bolivina lowmani can be associated with an environment under stress. In addition, the occurrence of test abnormalities among foraminifera may represent a useful biomarker for evaluating long-term environmental impacts in a...

Patterns of arboreal and terrestrial space use by non-volant small mammals in an Araucaria forest of southern Brazil

Palavras-chave: Benthic foraminifera; Guanabara Bay; Pollution; Heavy-metals.

Ano: 2004

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000100014

ABREU,MAURY S.L.; OLIVEIRA,LARISSA R. DE.

Despite the advances in the techniques for researching arboreal small mammals, detailed ecological data, such as habitat use patterns, are practically nonexistent for many species. Using 150 live-traps installed on the ground, understory (1.0-5.0m) and canopy (>5.0m) we investigated patterns of arboreal and terrestrial space use by small mammals in an Araucaria Forest in southern Brazil (29°29′08″S; 50°12′26″W). We also measured 19 microhabitat variables that could potentially influence the abundance of such mammals on each trap station. The results indicated that Akodon montensis and A. serrensis were mainly terrestrial. Delomys dorsalis was also terrestrial, but it also used understory (17.24% of captures). Juliomys sp. and Gracilinanus microtarsus...

Arthritic lesions and congenital fusion in foot bones of Panochthus sp. (Xenarthra, Cingulata)

Palavras-chave: Didelphimorphia; Micro-habitat; Mamíferos neotropicais; Rodentia; Estratificação vertical.

Ano: 2014

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000200807

BARBOSA,FERNANDO HENRIQUE DE S.; PORPINO,KLEBERSON DE O.; ROTHSCHILD,BRUCE M.; CABRAL,UIARA G.; BERGQVIST,LILIAN P..

ABSTRACT A set of lesions are re-described and new pathological findings in foot bones of Panochthus sp. (Xenarthra, Cingulata) are presented. The material reexamined in fact presents enthesiophytes instead of osteoartrithis, as previously interpreted. Furthermore, Calcium Pyrophosphate Deposition Disease (CPPD) was observed, a lesion absent in previous report. CPPD also was found in another set of foot bones and it was associated with a congenital fusion of two sesamoids. The material studied were collected in two natural tank deposits, one in Paraíba (material reexamined) and other in Rio Grande do Norte (new pathological findings) State.

Ontogenetic shape changes and sexual dimorphism in Aegla marginata Bond-Buckup and Buckup, 1994

Ano: 2019

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000200501

ADAM,CAROLINA L.; MAROCHI,MURILO Z.; MASUNARI,SETUKO.

ABSTRACT A study on relative growth, sexual dimorphism and ontogenetic trajectory was carried out in a population of the aeglidAegla marginata coming from Barrinha River, Iguape River Basin, Tunas do Paraná, Paraná State, Brazil. The size the of morphological sexual maturity was estimated for males and females. The analysis of sexual dimorphism and ontogenetic trajectory were performed using geometric morphometric technique. Males reach maturity with 10.58 mm of carapace length (CL) and females with 10.38 mm CL. Sexual size dimorphism was only visible among adults, with males reaching larger sizes. This is probably related to the reproductive strategy of males. However, sexual shape dimorphism was found for both juveniles and adults: the posterior region...

Redescription of Tijubina pontei, an Early Cretaceous lizard (Reptilia; Squamata) from the Crato Formation of Brazil

Palavras-chave: Allometry; Relative growth; Sexual dimorphism; Shape.

Ano: 2018

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401521

Simões,Tiago R..

The record of Gondwanan Mesozoic lizards is very poor. Among the few species described for this region there is Tijubina pontei, an Early Cretaceous lizard from the Crato Formation (late Aptian) of northeast Brazil. Its description is very brief and lacks most of its diagnostic characters and clear delimitation from other lizard species. Here, a full redescription of the holotype is provided. T. pontei is demonstrated to be a valid species and a new diagnosis is provided with reference to Olindalacerta brasiliensis, a contemporary species of the Crato Formation. It lacks the posteroventral and posterodorsal processes of the dentary; the tibial/fibular length equals the femoral length and its posterior dentary teeth are robust, cylindrically based,...

Silvopastoral system with Eucalyptus as a strategy for mitigating the effects of climate change on Brazilian pasturelands

Palavras-chave: Brazil; Crato Formation; Fossil lizard; Lower Cretaceous; Tijubina pontei; Tijubina pontei.

Ano: 2012

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000100008

BOSI,CRISTIAM; PEZZOPANE,JOSÉ RICARDO M.; SENTELHAS,PAULO CESAR.

Abstract The aim of the present study was to assess the effect of Eucalyptus trees in a silvopastoral system on the microclimate and the capacity of that to mitigate the effects of climate change on pasturelands. This study included an open pasture of Piatã palisadegrass and an adjacent pasture that contained both palisadegrass and East-to-West rows of Eucalyptus trees, with 15 m between rows, 2 m between trees within rows. The micrometeorological measurements were collected at several distances from the tree rows and in the open pasture. The silvopastoral system was associated with greater between-row shading when solar declination was high and greater near-tree shading when solar declination was around -22°. Both soil heat flux and temperature were...

High susceptibility of activated lymphocytes to oxidative stress-induced cell death

Palavras-chave: Agroforestry; Microclimate; Net radiation; Shading; Soil heat flux; Windbreak.

Ano: 2020

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652020000201001

Degasperi,Giovanna R.; Castilho,Roger F.; Vercesi,Anibal E..

The present study provides evidence that activated spleen lymphocytes from Walker 256 tumor bearing rats are more susceptible than controls to tert-butyl hydroperoxide (t-BOOH)-induced necrotic cell death in vitro. The iron chelator and antioxidant deferoxamine, the intracellular Ca2+ chelator BAPTA, the L-type Ca2+ channel antagonist nifedipine or the mitochondrial permeability transition inhibitor cyclosporin A, but not the calcineurin inhibitor FK-506, render control and activated lymphocytes equally resistant to the toxic effects of t-BOOH. Incubation of activated lymphocytes in the presence of t-BOOH resulted in a cyclosporin A-sensitive decrease in mitochondrial membrane potential. These results indicate that the higher cytosolic Ca2+ level in...

Development of an annual drought classification system based on drought severity indexes

Palavras-chave: Cell death; Free radicals; Immune response; Lymphopenia; Mitochondrial permeability transition; Spleen lymphocyte.

Ano: 2008

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000100009

LIMA,RAFAEL P.C.; SILVA,DEMETRIUS D. DA; MOREIRA,MICHEL C.; PASSOS,JÉSSICA B.M.C.; COELHO,CLÍVIA D.; ELESBON,ABRAHÃO A.A..

Abstract: In order to characterize the occurrence and intensity of droughts in the Doce River Basin, as well as to develop a system for its classification, four different drought indexes were evaluated: Percent of Normal Precipitation (PNP), Deciles Method (DM), Rainfall Anomaly Index (RAI) and Standardized Precipitation Index (SPI). The indices were calculated annually, based on precipitation data from 89 rainfall stations of the Brazilian National Water Agency (ANA). Nine analysis units (AUs) were determined in the basin and the Thiessen Polygons method was used to obtain the average precipitation in the respective drainage areas. The indices were calculated for each AU and then related to the drought intensity classes. An overall classification of the...

Analysis of an alternative method for the study of bromeliad-associated fauna in plants with different foliar organization

Palavras-chave: Climatic condition; Doce river; Precipitation; Rainfall season; River basin.

Ano: 2019

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100852

Müller,Gerson A.; Name,Fernando T.; Pacheco,Frederico C.L.; Marcondes,Carlos B..

The efficiency of an alternative method of collection (by suction of water) for the study of Culicidae and Chironomidae (Diptera), Scirtidae (Coleoptera) and Coenagrionidae (Odonata) in bromeliads with different foliar architecture in a restinga at Florianópolis, SC, Brazil, was studied. The alternative method was less efficient to collect Culicidae and Chironomidae (Wilcoxon test p < 0.05) and was more efficient to Scirtidae and Coenagrionidae (Wilcoxon test p > 0.05) from Aechmea lindenii. This method was less efficient to collect insects of all groups from Vriesea friburgensis (Wilcoxon test p < 0.05). The alternative method was efficient to estimate the diversity of these insects in both species of bromeliads. The higher mobility of...

Palavras-chave: Chironomidae; Collecting method; Culicidae; Odonata; Phytotelmata; Scirtidae.

Ano: 2010

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000400012

Advances in bioacoustics

Vielliard,Jacques M.E..

Graphs with constant mean curvature in the 3-hyperbolic space

Ano: 2004

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000200001

HINOJOSA,PEDRO A..

In this work we will deal with disc type surfaces of constant mean curvature in the three dimensional hyperbolic space which are given as graphs of smooth functions over planar domains. From the various types of graphs that could be defined in the hyperbolic space we consider in particular the horizontal and the geodesic graphs. We proved that if the mean curvature is constant, then such graphs are equivalent in the following sense: suppose that M is a constant mean curvature surface in the 3-hyperbolic space such that M is a geodesic graph of a function rho that is zero at the boundary, then there exist a smooth function f that also vanishes at the boundary, such that M is a horizontal graph of f. Moreover, the reciprocal is also true.

Technical efficiency analysis of marine shrimp farming (Litopenaeus vannamei) in biofloc and conventional systems: A case study in northeastern Brazil

Palavras-chave: Hyperbolic space; Geodesic and horizontal graphs; Constant mean curvature; Elliptic partial differential equations.

Ano: 2002

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000300001

REGO,MARCELO A.S.; SABBAG,OMAR J.; SOARES,ROBERTA B.; PEIXOTO,SILVIO.

Abstract Shrimp farming has a great ecological, economic, and social importance in northeastern Brazil. Although the conventional farming system is widely used, biofloc technology (BFT) system has been developed to reduce environmental impacts and optimizing the production. Thus,the present study evaluated the technical efficiency of production cycles of Litopenaeus vannamei in conventional and BFT systems.We analyzed 48 production cycles in the conventional system in 2013 and 2014 and 9 cycles in the BFT system in 2014 through data envelopment analysis (DEA). The inputs corresponded to the population density (post-larvae m-2), amount of feed (kg ha-1 cycle-1), labor (man ha-1) and power supply (HP ha-1), whereas the yield (kg ha-1 cycle-1) was considered...

Clinical studies: generic medicines

Palavras-chave: Data envelopment analysis; Inefficiency; Productive systems; Shrimp farming.

Ano: 2018

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703705

ALVES,ANTONIO J..

Bird diversity along a gradient of fragmented habitats of the Cerrado

Ano: 2002

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652002000300040

JESUS,SHAYANA DE; PEDRO,WAGNER A.; BISPO,ARTHUR A..

ABSTRACT Understanding the factors that affect biodiversity is of central interest to ecology, and essential to species conservation and ecosystems management. We sampled bird communities in 17 forest fragments in the Cerrado biome, the Central-West region of Brazil. We aimed to know the communities structure pattern and the influence of geographical distance and environmental variables on them, along a gradient of fragmented habitats at both local and landscape scales. Eight structural variables of the fragments served as an environmental distance measurement at the local scale while five metrics served as an environmental distance measurement at the landscape scale. Species presence-absence data were used to calculate the dissimilarity index. Beta...

Multicomponent training with different frequencies on body composition and physical fitness in obese children

Palavras-chave: Beta diversity; Environmental distance; Forest fragments; Landscape scale; Turnover.

Ano: 2018

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100123

ALVES,ANA SOFIA R.; VENÂNCIO,TELMA L.; HONÓRIO,SAMUEL ALEXANDRE A.; MARTINS,JÚLIO MANUEL C..

Abstract: Introduction: The aim of the study was to compare the effects of ten-week multicomponent training with different exercise frequencies on body composition (BC) and physical fitness (PF) in overweight and obese young children. Methods: 40 children, aged 12-15 (14.77±1.49), were randomly selected and assigned to experimental groups to train three times/week (EG1) or two times/week (EG2) for 10 weeks and a CG group (no training program). Results: It was shown that experimental groups (EG1 and EG2) improved similarly aerobic capacity (3.8% and 3.5%, respectively), muscular strength (29.7% and 25.2%), flexibility (6.1% and 9.9%), body mass index (5.0% and 4.6%), and body fat (6.4% and 5.6%) from pre- to post-training. CG group showed no significant...

Geochronology of ore deposits: new trends about age and lifetime of the hydrothermal systems

Palavras-chave: Aerobic; Health; Obesity; Strength; Youth; Program.

Ano: 2019

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700802

TASSINARI,COLOMBO C.G..

Lizard assemblages on sandy coastal plains in southeastern Brazil: An analysis of occurrence and composition, and the role of habitat structure

Ano: 2001

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652001000300036

OLIVEIRA,JANE C.F.; PEREIRA-RIBEIRO,JULIANE; WINCK,GISELE R.; ROCHA,CARLOS F.D..

Abstract Data on the structure of lizard communities in the different biomes and ecosystems of Brazil are still limited. In this study, we related the species richness, abundance and the spatial occurrence of lizards to the structure of the vegetation found on the coast of the state of Espírito Santo, southeastern Brazil, to determine whether habitat influences the structure of lizard communities. We conducted fieldwork in 2012, 2013 and 2014, collecting data in standardized samples. We analyze whether variables of vegetation structure influenced species richness and abundance, using Generalized Linear Models (GLMs). We recorded 12 lizard species from eight families. In general, species richness and abundance were similar among sites. Locally, we recorded...

Contributions of the complexity paradigm to the understanding of Cerrado's organization and dynamics

Palavras-chave: Community ecology; Community structure; Mesohabitat; Squamata.

Ano: 2019

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100602

MATTOS,SÉRGIO H.V.L. DE; VICENTE,LUIZ E.; PEREZ FILHO,ARCHIMEDES; PIQUEIRA,JOSÉ R.C..

ABSTRACT The Brazilian Cerrado is a vegetation mosaic composed of different physiognomies. Discussions remain open regarding the factors and processes responsible for the dynamic and spatial organization of the Cerrado - in its different physiognomies. The contributions of the complexity paradigm in this context are still less exploited, despite its great potential for explanations and predictions presented in previous diverse dynamic systems of complex behavior researches, a category in which the Cerrado can be included. This article has the intention of contributing to the construction of this new perspective, discussing - from theoretical concepts - the paradigm of complexity for the understanding of the organization and the dynamics of the Cerrado.

Some devonian Chonetoidea (Brachiopoda) from the Amazon and Parnaíba Basins, Brazil, and their stratigraphic and paleogeographic implications

Palavras-chave: Cerrado; Complexity; Complex system; Dynamics; Self-organized criticality.

Ano: 2016

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000602417

FONSECA,VERA M.M.; MACHADO,DEUSANA M.C..