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| Registros recuperados: 208 | |
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| Cunha,Rodrigo da; Blochtein,Betina. |
| A study of the life history of the solitary bee Monoeca xanthopyga, was conducted at the Araucária Plateau, at the state of Rio Grande do Sul. The study focused the seasonality, sexual behavior, females activity during nest building, the exploited plant resources and the associated parasitoids. Three nest aggregations of M. xanthopyga built in clay soil with few plant cover or none at all, were studied on the Parque Nacional dos Aparados da Serra, located in Cambará do Sul, Rio Grande do Sul State. The nests were randomly distributed in areas up to eight square meters in size and reach a maximum density of 57 nests per square meter. The only one generation occurred from January to April. The immature stayed in diapausa in the prepupa stage during eight to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Floral rewards; Monoeca xanthopyga; Nest aggregations; Parasitoids; Reproductive behavior; Seasonality; Tapinotaspidini. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000100013 |
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| Hilário,Sergio D.; Ribeiro,Márcia de F.; Imperatriz-Fonseca,Vera L.. |
| Flight activity of foragers of four colonies of Plebeia remota (Holmberg, 1903) was registered from December 1998 to December 1999, using an automated system (photocells and PLC system). The colonies originated from two different regions: Cunha, state of São Paulo, and Prudentópolis, state of Paraná, Brazil. Flight activity was influenced by different climatic factors in each season. In the summer, the intensity of the correlations between flight activity and climatic factors was smaller than in the other seasons. During the autumn and winter, solar radiation was the factor that most influenced flight activity, while in the spring, this activity was influenced mainly by temperature. Except in the summer, the various climatic factors similarly influenced... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stingless bees; Foraging; Climatic factors; Seasonality; Geographic distribution. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000300004 |
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| Silva,Edilane Aparecida da; Silva,Wilson Jesus da; Barreto,Antônio Carlos; Oliveira Junior,Antonio Barbosa de; Paes,José Mauro Valente; Ruas,José Reinaldo Mendes; Queiroz,Domingos Sávio. |
| The present study aimed to estimate the photosynthetically active radiation of tropical forage grasses in ten cutting dates, under irrigation. The following treatments were used: Brachiaria decumbens grass (Brachiaria decumbens cultivar Basilisk), Marandu grass (Brachiaria brizantha cultivar Marandu), Xaraes grass (Brachiaria brizantha, cultivar Xaraes), Mombaça grass (Panicum maximum cultivar Mombaça), Tanzania grass (Panicum maximum, cultivar Tanzania) and Tifton 85 grass (Cynodon spp cultivar Tifton 85). The weather parameters were collected by an automatic meteorological station installed in the location and used for irrigation management. The experiment was arranged in a split-plot completely randomized block design, considering the grasses as plots... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forage production; Growth; Seasonality; Vegetation dynamics; Weather. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000300015 |
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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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| Picinin,L.C.A.; Toaldo,I.M.; Hoff,R.B.; Souza,F.N.; Leite,M.O.; Fonseca,L.M.; Diniz,S.A.; Silva,M.X.; Haddad,J.P.A.; Cerqueira,M.M.O.P.; Bordignon-Luiz,M.T.. |
| ABSTRACT The present study aimed to identify the climate condition parameters that are associated with the occurrence of antimicrobial and macrocyclic lactone residues in bulk tank milk using a multivariate principal components analysis (PCA). A total of 132 raw milk samples were collected at dairy farms in Minas Gerais State in Brazil and analyzed for 35 analytes, comprising macrocyclic lactones and antibacterials, using liquid chromatography coupled with mass spectrometry in tandem mode spectrometry. Of the 132 samples, 34 (25.76%) bulk tank milk samples were positive for at least one analyte. PCA showed that antimicrobial residues in bulk tank milk occurred less frequently on days with a higher average temperature, maximum temperature and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anthelmintic; Antibiotic; Veterinary drug; Seasonality; Raw milk. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352017000200474 |
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| Picinin,L.C.A.; Toaldo,I.M.; Hoff,R.B.; Souza,F.N.; Leite,M.O.; Fonseca,L.M.; Diniz,S.A.; Silva,M.X.; Haddad,J.P.A.; Cerqueira,M.M.O.P.; Luiz,M.T.B.. |
| ABSTRACT The present study attempted to identify climate conditions that are associated with the occurrence of pyrethroid residues using a multivariate principal component analysis (PCA). A total of 132 raw milk samples were collected from dairy farms in Minas Gerais State - Brazil and analyzed for seven analytes using gas chromatography with electron capture detection. Of the 132 milk samples, pyrethroid residues were identified in 14 (10.6%) milk samples, of which 12 (9.1%) and two (1.5%) milk samples had the identification of cypermethrin and deltamethrin, respectively. From those samples, nine (6.8%) milk samples were regarded as non-compliant for cypermethrin with this analyte concentration above the maximum residue limits set by Brazilian... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Veterinary drug; Pesticide; Raw milk; Seasonality; Dairy cow. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352016000601721 |
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| Barraquand, F.; Picoche, C.; Maurer, Daniele; Carassou, L.; Auby, Isabelle. |
| Phytoplanktonic communities maintain a high diversity in a seemingly homogeneous environment, competing for the same set of resources. Many theories have been proposed to explain this coexistence despite likely competition, such as contrasted responses to temporal environmental variation. However, theory has developed at a faster pace than empirical evaluation using field data, which requires inferring drivers of community dynamics from observational time series. Here, we combine autoregressive models with a data set spanning more than 20 years of phytoplankton counts every two weeks, together with nutrients and physical variables. By comparing models dominated by nutrients or physical variables (hydrodynamics and climate), we first explore which abiotic... |
| Tipo: Text |
Palavras-chave: Competition; Diatoms; Dinoflagellates; Hydrodynamics; Interactions; MAR; Mutualism; Network; Population dynamics; Seasonality; Time series. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00461/57257/59285.pdf |
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| Bragança,Marcos A L; Lima,Jefferson D. |
| This first survey of the ant fauna in a children's hospital in the city of Palmas, state of Tocantins, compares species composition, abundance and infestation rate of ants between rainy and dry seasons, day and night periods, and among 15 hospital sectors. Forty-eight collections, being 12 diurnal and 12 nocturnal in each season using five attractive baits distributed per sector, maintained for 3h per sampling. A total of 34,309 ants were collected, distributed in 12 species: Acromyrmex sp., Brachymyrmex sp., Camponotus spp. (four morphospecies), Dorymyrmex sp., Tetramorium sp., Solenopsis globularia (Creighton), Solenopsis saevissima Smith, Tapinoma melanocephalum (Fabricius) and Paratrechina longicornis (Latreille). The hospital presented an average... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nosocomial infection; Diurnal activity; Nocturnal activity; Seasonality; Hospital sector. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2010000100017 |
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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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| Hernandez Farinas, Tania; Ribeiro, Lourenco; Soudant, Dominique; Belin, Catherine; Bacher, Cedric; Lampert, Luis; Barille, Laurent. |
| Suspended marine benthic microalgae in the water column reflect the close relationship between the benthic and pelagic components of coastal ecosystems. In this study, a 12-year phytoplankton time-series was used to investigate the contribution of benthic microalgae to the pelagic system at a site along the French-Atlantic coast. Furthermore, all taxa identified were allocated into different growth forms in order to study their seasonal patterns. The highest contribution of benthic microalgae was observed during the winter period, reaching up to 60% of the carbon biomass in the water column. The haptobenthic growth form showed the highest contribution in terms of biomass, dominant in the fall-winter period when the turbidity and the river flow were high.... |
| Tipo: Text |
Palavras-chave: Co-inertia; Dynamic linear models; Epipelon; Epiphyton; Haptobenthos; Microphytobenthos growth forms; Seasonality; Tychoplankton. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00392/50345/51035.pdf |
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| CHAVES,MARCIO F.; TENÓRIO,FERNANDA C.M.A.; SANTOS,IGOR L.V.L.; J.C.L. NETO,CLOVIS; TEXEIRA,VALERIA W.; MOURA,GERALDO J.B.; TEXEIRA,ÁLVARO A.C.. |
| ABSTRACT The objective of this study was to assess variations of the condition factor (K1) in relation to the gonadosomatic- RGS and energy reserves (hepatosomatic - RWL and liposomatic - RFB relations) of Leptodactylus macrosternum and their relationship to climate variation in the Northeast of Brazil, Caatinga area, state of Paraiba. The animals were captured fortnightly through active collecting, between January and December 2013. Significant differences were observed in the monthly variations of K1, RGS and RFB indices in male and female L. macrosternum over the months of collection. In males, K1 showed no significant relationship with the other variables. In females, RGS values only show notable correlations with RWF and K1 values. K1 values showed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anurans; Fatty bodies; Northeast; Reproduction; Seasonality. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401591 |
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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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| Registros recuperados: 208 | |
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