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| Registros recuperados: 211 | |
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| ARAUJO,Elias da Costa; MARTINS,Lucas Pereira; DUARTE,Marcelo; AZEVEDO,Gisele Garcia. |
| ABSTRACT Rainfall is one of the most influential factors driving insect seasonality in the Amazon region. However, few studies have analyzed the temporal dynamics of fruit-feeding butterflies in the Brazilian Amazon, specially in its eastern portion. Here, we evaluated the diversity patterns and temporal distribution of fruit-feeding butterflies in a remnant of eastern Amazon forest in the Baixada Maranhense, northeastern Brazil. Specifically, we tested whether fruit-feeding butterflies are temporally structured and whether rainfall influences species richness and abundance. Butterflies were collected with baited traps in both the rainy and dry seasons for two consecutive years. In total, we captured 493 butterflies belonging to 28 species, 15 genera and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazilian Amazon; Frugivorous butterflies; Maranhão; Seasonality; Temporal diversity; Tropical forest. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000100012 |
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| Fujimoto,Rodrigo Yudi; Anjos,Ellem Cristina Silva dos; Ramos,Fabrício Menezes; Martins,Maurício Laterça. |
| The current study presents a parasitological survey of larval nematodes from freshwater ornamental fish Iguanodectes spilurus caught in the watercourse of the Caete River, in the northeast region of the State of Para, Brazil. A total of 176 specimens, 1.36±0.75 g weight and 5.53±0.98 cm total length, were analyzed. Nematode larvae were identified as Capillaria sp., Procamallanus sp. and Anisakidae, with prevalence of 70.45% and infection intensity ranging from 1.81 to 4.70 larvae. The highest prevalence 57.38% occurred in the liver, but no seasonality was observed, indicating high infection throughout the year. Seasonality was observed in fish parasitized in the stomach, intestine and caecum, with prevalence and mean intensity of 17.61% and 2.32 parasites,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Characidae; Parasitology; Seasonality; River. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672013000400013 |
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| Almeida,Ronaldo de; Bernardi,José Vicente Elias; Oliveira,Ronaldo Cavalcante; Carvalho,Dario Pires de; Manzatto,Angelo Gilberto; Lacerda,Luiz Drude de; Bastos,Wanderley Rodrigues. |
| The study was conducted in Puruzinho lake (Humaitá, AM) considering seasonal periods of rainy and dry in way to elucidate the flood pulse importance in the deposition, remobilization and distributions of mercury and organic matter in bottom sediments in the Madeira River Basin (Brazilian Amazon). Bottom sediments and soils samples were analyzed for total mercury and organic matter. Mercury concentrations obtained in bottom sediment were 32.20-146.40 ng g-1 and organic matter values were 3.5 - 18.0%. The main region for accumulation of mercury and organic matter was in the central and deepest lake area In the rainy season there was a greater distribution of Hg and organic matter, mainly controlled by means of income of the Madeira river water during... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Organic matter; Indicator kriging; Madeira river; Seasonality. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672014000100010 |
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| de CARVALHO,Denisar Paggioli; de OLIVEIRA,Harley Nonato. |
| Physic nut (Jatropha curcas L.) is an oilseed, semi-evergreen shrub or small tree of the Euphorbiaceae family, whose seeds contain oil that can be processed into a high quality biofuel. However, there have been reports of arthropods feeding from its leaves, including the green leafhopper Empoasca sp. (Hemiptera: Cicadellidae). The large numbers of this insect, observed in certain periods of the year in many regions of Brazil, are causing damage to the oilseed crops. This study aims at evaluating the fluctuation in green leafhopper population in a physic nut crop in Dourados, Mato Grosso do Sul, to assess possible correlations with rainfall, maximum, average and minimum temperatures. This evaluation was conducted between March 2011 and July 2012. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Jatropha curcas; Green leafhopper; Rainfall; Seasonality. |
| Ano: 2016 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2016000100008 |
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| Menezes,Tatiane Gomes Calaça; Rodal,Maria Jesus Nogueira; Lima,André Luiz Alves de; Lima,Lucivania Rodrigues; Pinto,Monalisa Alves Diniz S. C.; Melo,André Laurênio de. |
| ABSTRACT It is assumed that morphological traits of seedlings reflect different strategies in response to environmental conditions. The ecological significance of this has been widely documented in rainforests, where habitat structure and species interactions play an important role in community assembly. However, in seasonally dry ecosystems, where environmental filtering is expected to strongly influence community structure, this relationship is poorly understood. We investigated this relationship between functional groups of seedlings and life history traits and tested whether functional group predicts the ecological strategies employed by woody species to deal with the stressful conditions in seasonally dry ecosystems. Seedling functional groups, life... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dry forest; Environmental filtering; Functional traits; Initial establishment; Recruitment; Seasonality. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000100020 |
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| Menezes,Isiara Silva; Couto-Santos,Ana Paula Lima do; Funch,Ligia Silveira. |
| ABSTRACT We compared the reproductive phenology and floral visitors of Eschweilera tetrapetala growing along the edge and in the interior of a submontane forest in the Chapada Diamantina mountains, Bahia State, Brazil. We sought to determine if there were inter-annual differences in intensity and seasonality associated with environmental conditions, and if there were differences in floral visitors between the two environmental contexts. Phenological observations were performed for three years, and included the occurrence of an El Niño event. We applied circular statistics to detect seasonal trends, performed cross correlations between phenophases and climate, Kruskal-Wallis and Wilcoxon signed-rank tests for inter-annual variation, and the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: El Niño; Eschweilera tetrapetala; Floral visitors; Linear edge effects; Phenology; Precipitation; Seasonality. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000100001 |
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| Batista,Wanessa Vieira Silva Menezes; Pôrto,Kátia Cavalcanti; Santos,Nivea Dias dos. |
| ABSTRACT The ready availability of water resources distinguishes the humid forest of Chapada do Araripe, Ceará State, Brazil, from the semiarid vegetation around it. The regional climate demonstrates a marked seasonality of rainfall that affects the ecological strategies of the species found there. We studied the bryophytes of the humid forest of Chapada do Araripe, analyzing their diversity, geographic distributions, and ecological and reproductive aspects. Bryophytes were collected from different substrates using the random-walk method. We gathered information concerning the geographic distribution, functional groups (life forms, light tolerance guilds, and habits) and reproductive aspects of each taxon. We found 76 bryophyte species, predominantly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Mosses; Liverworts; Floristics; Enclave forest; Seasonality. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000200303 |
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| Santana,Karoline Coutinho de; Souza,Isys Mascarenhas; Miranda,Lia d'Afonsêca Pedreira de; Funch,Ligia Silveira. |
| ABSTRACT We evaluated the vegetative and reproductive phenological patterns of the orchids Cattleya elongata, Cyrtopodium aliciae, Epidendrum orchidiflorum, Epistephium lucidum, and Sobralia liliastrum (Orchidaceae) growing on sandstone outcrops in the Chapada Diamantina Mountains in northeastern Brazil. Phenological events were associated with abiotic factors, leaf longevity, life form, plant growth pattern, and pollination syndrome. Phenological observations were made for 18 months and followed the phenophases of: stem/pseudobulb emission, leaf flush, leaf fall, flowering, immature fruit and mature fruit. Seasonality, synchrony, and correlations between phenophases and environmental variables were tested. The orchid species demonstrated aseasonal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Campo rupestre; Flowering overlap; Photoperiod; Seasonality; Synchrony. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000300508 |
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| Moura, Marielly Maria Almeida; Pires, Daniel Ananias de Assis; Rodrigues, José Avelino Santos; Sales, Eleuza Clarete Junqueira de; Costa, Renê Ferreira; Tolentino, Daniella Cangussú. |
| The objective was to select sorghum genotypes for silage production using its chemical characteristics. The experiment was carried out in the facilities of Embrapa Maize and Sorghum in Sete Lagoas, state of Minas Gerais, to evaluate the agronomic characteristics, and nutritional quality of silage of twelve sorghum genotypes. We used a randomized block design with three replications. In relation to the production of green matter, the genotypes SF15 Volumax and BR610 stood out (52.07; 48.00 and 41.87 ton ha-1). Regarding pH, genotypes 1015339, 1015347, 1016007, SF15, BRS655, Volumax and BR610 averaged 3.68. All genotypes were similar considering the nutritional value, ammonia nitrogen and water activity. The genotypes SF15, Volumax and BRS610 showed the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: ZOOTECNIA; NUTRIÇÃO E FORRAGICULTURA preserved food; Seasonality; Genotypes and production. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/31810 |
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| Santana, Sabrina Saraiva; Universidade Estadual Paulista “Júlio de Mesquita Filho”; Fonseca, Dilermando Miranda da; Universidade Federal de Viçosa; Santos, Manoel Eduardo Rozalino; Universidade Federal de Uberlândia; Sousa, Braulio Maia de Lana; Universidade Federal de Sergipe; Gomes, Virgílio Mesquita; Universidade Estadual de Montes Claros; Nascimento Júnior, Domicio do; Universidade Federal de Viçosa. |
| Tillering dynamics during regrowth in the spring (September to December 2009) on signal grass (Brachiaria decumbens cv. Basilisk) pastures deferred in the beginning of April 2009 is evaluated. Four pasture heights were evaluated at the beginning of deferment (10, 20, 30 and 40 cm). The experimental design consisted of completely randomized blocks with two replications. Rise in pasture height at the beginning of deferment decreased the appearance rate, increased the mortality rate and reduced the survival rate, the balance between appearance and mortality and the stability index of the tiller population at the beginning of the spring. Pastures deferred at initial height of 30 and 40 cm presented relatively stable tiller appearance rate between the beginning... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria decumbens; Pasture deferment; Plant ecophysiology; Seasonality. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/20463 |
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| Vitorino Júnior, Oscar Barroso; Lopes, Kelven Stella; Pelicice, Fernando Mayer. |
| Brycon nattereri is a threatened fish species restricted to small headwater rivers of the Paraná, São Francisco and Tocantins rivers. This species has been extirpated from many sites, and little is known about its ecology. In this sense, the present study investigated temporal variations in the occurrence, abundance and length structure of B. nattereri in the Dois Irmãos river, a small headwater river from the Tocantins river basin. Samples were taken monthly between January and November of 2009 and 2010. The studied site comprised a 4.5 km river stretch, sampled with an active fishing method (fly fishing). Individuals caught were counted, measured and returned immediately to the river. We caught 302 individuals along two years. Brycon nattereri was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 2.05.03.00-8 Ecologia Aplicada fish population; Seasonality; Conservation; Headwater; Tocantins river Ecologia. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/23857 |
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| Souza, Geza Thais Rangel e; UEM; Machado, Marion Haruko; UEM; Dias, Maria Luiza Gaspar Goulart; UEM; Yamada, Fábio Hideki; UEM; Pagotto, João Paulo Alves; UEM; Pavanelli, Gilberto Cezar; UEM. |
| Este trabalho analisa a composição e a sazonalidade das espécies de moluscos potenciais hospedeiros intermediários de trematódeos digenéticos, bem como fornece informações a respeito das possíveis infecções por diplostomídeos nesta comunidade, em ambientes lênticos da planície de inundação do alto rio Paraná. Foram coletadas e analisadas dez espécies de moluscos, e houve nítida sazonalidade na densidade e abundância dos moluscos, correlacionada significativamente com a temperatura da água. Os maiores valores observados foram entre os meses de novembro de 2002 a fevereiro de 2003. Apenas Biomphalaria peregrina caracterizou-se como hospedeiro para Diplostomidae, pois nesta espécie foram encontradas 32 cercárias de Hysteromorpha triloba em março de 2003. |
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Palavras-chave: 2.00.00.00-6 Ciências Biológicas moluscos; Diplostomidae; Composição; Sazonalidade; Rio Paraná. mollusks; Diplostomidae; Composition; Seasonality; Paraná river. |
| Ano: 2008 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5018 |
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| Oliveira, Fábio Henrique Portella Corrêa de; Silva, Joanne D'Arc Bezerra da; Costa, Anapaula Nunes Silvestre Fernandes; Ramalho, Waldemir Pimentel; Moreira, César Henrique Pinto; Calazans, Tiago Luiz Santana. |
| This study investigated the effect of seasonality on the Cyanobacteria community in two tropical eutrophic reservoirs in northeastern Brazil. Monthly samplings were conducted in the sub-surface of reservoirs. The following abiotic variables were analyzed: apparent color, turbidity, conductivity, alkalinity, calcium, magnesium, sodium, potassium, sulfate, total phosphorous, ammonia, nitrate, nitrite, chlorides, total hardness and chlorophyll-a, according to APHA (2012). Cyanobacteria density was quantified through biomass. Data were analyzed using one-way ANOVA and Redundancy Analysis (RDA). Higher mean values of Cyanobacteria biomass occurred in the dry (9.9mm3 L-1) and rainy (19.0mm3 L-1) season in Jucazinho and Carpina reservoirs, respectively,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abiotic parameters; Phytoplankton; Seasonality. |
| Ano: 2015 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/26418 |
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| Nabout, João Carlos; UFG; Nogueira, Ina Souza; UFG. |
| O objetivo desse trabalho foi averiguar a mudança sazonal e o sincronismo temporal de atributos da comunidade fitoplanctônica (diversidade e a densidade) de quatro reservatórios urbanos eutróficos (lago do Jardim Botânico, lago do parque Vaca Brava, lago das Rosas e lago do bosque dos Buritis) do município de Goiânia, Estado de Goiás. A diversidade foi estimada pelo índice de Shannon-Winner (H’) e a densidade foi pelo método de Utermöhl. Todos os quatro lagos apresentaram elevada diversidade fitoplanctônica, variando de H’ = 0,97 (bosque dos Buritis) a H’ = 4,29 (lago do Jardim Botânico), além disso, a diversidade foi significativamente distinta entre os quatro lagos estudados (F = 4,74; p < 0,001, n = 4). A densidade fitoplanctônica foi elevada, sendo... |
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Palavras-chave: Ecologia; Botanica; Taxonomia de criptógamos Densidade; Diversidade; Sincronismo; Lagos artificiais; Fatores locais; Sazonalidade Density; Diversity; Synchronism; Artificial lakes; Local factors; Seasonality. |
| Ano: 2011 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5955 |
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| Registros recuperados: 211 | |
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