Seasonal Fluctuation
Mostrando 1-12 de 32 artigos, teses e dissertações.
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1. Propriedades Multifractais da Temperatura do Ar Diária no Nordeste do Brasil
Resumo A investigação da dinâmica das variáveis climáticas fornece informações importantes sobre a sua variabilidade espaço-temporal. Compreender esses processos é fundamental para o desenvolvimento de modelos climáticos que sirvam de base para a análise de cenários futuros e para a previsão das mudanças climáticas. Neste trabalho, analisaram-
Rev. bras. meteorol.. Publicado em: 30/05/2019
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2. Influence of seasonal variation on the hydro-biogeochemical characteristics of two upland lakes in the Southeastern Amazon, Brazil
ABSTRACT Limnological characteristics of the Violão and Amendoim lakes, in the Serra dos Carajás, Amazon, were studied interannually (2013-2014). Climate data indicate anomalous conditions during the 2013 rainy period with higher rainfall and lower temperature in the beginning (November). Lake levels were influenced after the first and second hour of each
An. Acad. Bras. Ciênc.. Publicado em: 2016-12
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3. Reproductive biology of the coypu, Myocastor coypus (Rodentia: Myocastoridae) in western Japan
We describe the reproductive biology of the coypu, Myocastor coypus (Molina, 1782), in western Japan, as an attempt to contribute to an efficient population control program of the coypu population. A total of 212 specimens (113 males and 99 females) were collected in the Tottori prefecture from February 2010 to January 2012. From the age estimation based on
Zoologia (Curitiba). Publicado em: 2013-04
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4. Barley yellow dwarf virus-PAV in Brazil: seasonal fluctuation and biological characteristics
The yellow dwarf disease in winter cereal crops is caused by species of Barley yellow dwarf virus (BYDV) and Cereal yellow dwarf virus (CYDV) (Luteoviridae). These viruses are transmitted to grasses (Poaceae) by aphids (Aphididae) and the frequency of virus population is affected by oscillations in the vector and host populations. Seasonal fluctuations of BY
Trop. plant pathol.. Publicado em: 2013-02
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5. Temporal distribution of blood donations in three Brazilian blood centers and its repercussion on the blood supply
BACKGROUND: Seasonal distribution of blood donation hinders efforts to provide a safe and adequate blood supply leading to chronic and persistent shortages. This study examined whether holidays, geographical area and donation type (community versus replacement) has any impact on the fluctuation of donations. METHODS: The numbers of blood donations from 2
Rev. Bras. Hematol. Hemoter.. Publicado em: 2013
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6. Seasonal fluctuation in the population of Harmonia axyridis (Pallas, 1773) (Coleoptera: Coccinellidae) and co-occurrence with other Coccinellids in the Federal District of Brazil
A joaninha asiática, Harmonia axyridis (Pallas, 1773), foi primeiramente registrada no Brasil em 2002 no Estado do Paraná, sendo posteriormente registrada nos estados de São Paulo e Minas Gerais. Essa espécie pode colonizar novas áreas e tornar-se dominante na comunidade local, reduzindo a densidade e diversidade de espécies nativas, principalmente de
Papéis Avulsos de Zoologia (São Paulo). Publicado em: 2012
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7. Spatial patterns of zooplanktivore Chirostoma species (Atherinopsidae) during water-level fluctuation in the shallow tropical Lake Chapala, Mexico: seasonal and interannual analysis
This study addresses the influence of water-level fluctuations on fish distribution at two temporal scales: seasonal (dry and rainy) and interannual (low and high volume conditions). The analysis of abundance relationships among three zooplanktivore Chirostoma species at fifteen sites in Lake Chapala, Mexico, revealed the significant influence of contrasting
Neotropical Ichthyology. Publicado em: 2011
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8. Influência dos fatores climáticos na flutuação sazonal da mosca-do-chifre no município de Presidente Médici, Rondônia.
No período de outubro de 1996 a novembro de 1997 realizou-se um estudo para evidenciar a influência dos fatores climáticos, como temperatura, precipitação e umidade relativa sobre a flutuação sazonal da mosca-do-chifre, Haematobia irritans, no campo experimental da Embrapa Rondônia no município de Presidente Médici, Rondônia. As moscas foram captu
Porto Velho: Embrapa Rondônia. Publicado em: 2011
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9. Fatores determinantes do ataque de Coccus viridis ao cafeeiro / Determinants factors of the attack of Coccus viridis to coffee plants
A cochonilha-verde Coccus viridis Green (Hemiptera: Sternorrhyncha: Coccidae) é uma espécie cosmopolita, que é praga do café e outras culturas. Devido a sua importância há necessidade de se conhecer os fatores que influenciam seu ataque. Assim, este trabalho teve como objetivo estudar os efeitos da fase da cultura do café, dos elementos climáticos, d
Publicado em: 2010
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10. Análise faunística e flutuação populacional de cigarrinhas (Hemiptera: Cicadellidae) potenciais vetoras de Xylella fastidiosa em pomares de ameixeira nos estados do Rio Grande do Sul e São Paulo, Brasil / Faunistic analysis and seasonal fluctuation of sharpshooters (Hemiptera:Cicadellidae) that are potential vectors of Xylella fastidiosa in plum orchards in Rio Grande do Sul and São Paulo states, Brazil
The plum leaf scald (PLF) is a major threat for plum production in Brazil. PLF is caused by the bacteria Xylella fastidiosa which is transmitted by sharpshooter leafhoppers (Hemiptera: Cicadellidae, Cicadellinae). In this investigation, we surveyed the Cicadellinae species associated with plum orchards located in Rio Grande do Sul (RS) and São Paulo (SP) st
Publicado em: 2009
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11. Análise estatística da influência da precipitação e de características do solo na variação do nível d´água em área de recarga do aquífero Guarani / Statistical analysis about the influence of precipitation and soil characteristics on the water level fluctuation on recharge area of the Guarani aquifer system recharge
The increasing of water use to different consumes have generated the growing of researches related about groundwater resources. The recharges quantification is a indispensible requirement to management of these resources. The main objective of this research is to analyze the influence of precipitation and soil characteristics on the water level fluctuations
Publicado em: 2009
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12. Accounting earnings properties and determinants of earnings response coefficient in Brazil / Propriedades do lucro contábil e determinantes do coeficiente de resposta ao lucro no Brasil
A fundamental issue at the interface of economics, finance, and accounting involves the relation between a firms reported earnings and its stock returns. The lack of research in this field using Brazilian data and the limitations of previous research in terms of time-series data (small length available) motivates the present research. In addition, the practi
Publicado em: 2009