Parana River
Mostrando 13-24 de 324 artigos, teses e dissertações.
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13. Redescription of Schizodon dissimilis and appraisal of the dark barred species of the genus (Characiformes: Anostomidae)
RESUMO Schizodon dissimilis é redescrita com base em síntipos e outros espécimes coletados nos rios Parnaíba, Jaguaribe e Mearim, e um lectótipo e paralectótipos são designados. Schizodon dissimilis é distinta das espécies Amazônicas e de seus congêneres do sudeste do Brasil por possuir quatro barras transversais castanho-escuras sem uma listra lo
Neotrop. ichthyol.. Publicado em: 23/09/2019
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14. [PROVISIONAL] Genetic evidence for a species complex within the piranha Serrasalmus maculatus (Characiformes, Serrasalmidae) from three Neotropical River basins based on mitochondrial DNA sequences
Abstract Mitochondrial molecular markers (DNA sequences of D-loop, cytochrome b and cytochrome c oxidase I) were employed to characterize populations of the piranha Serrasalmus maculatus from Upper Paraná, Upper Paraguay and Tocantins River basins. D-loop sequences of S. maculatus population from Paraná-Paraguay River basin exhibited tandem repeats of shor
Genet. Mol. Biol.. Publicado em: 22/08/2019
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15. Pesticide Determination in Water Samples from a Rural Area by Multi-Target Method Applying Liquid Chromatography-Tandem Mass Spectrometry
The rises of toxic effects caused by pesticides are of concern. However, Brazilian legislation still needs scientific subsides to improve the water quality requirements. This can be attributed in part to the few existing studies showing the occurrence and levels of multi-residue pesticides. Therefore, the objective of this study was to investigate the presen
J. Braz. Chem. Soc.. Publicado em: 12/08/2019
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16. Morphological sexual maturity of the freshwater anomuran crab Aegla parana (Crustacea, Decapoda, Aeglidae) from Negro River Sub-basin, Upper Iguaçu Basin, southern Brazil
RESUMO O comprimento da carapaça (CL) no início da maturidade sexual morfológica (MSM) em Aegla paranaSchmitt, 1942foi estimado em uma população que ocorre na Sub-bacia do Rio Negro, Bacia do Alto Iguaçu, sul do Brasil. Os animais foram capturados com rede Surber e com armadilhas iscadas no Rio Negro e no seu afluente Rio Totó, em dezembro/2017, junho
Iheringia, Sér. Zool.. Publicado em: 05/08/2019
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17. Factors driving seed dispersal in a Neotropical river-floodplain system
ABSTRACT Dispersal is a key process affecting the diversity of natural communities. We addressed hydrochory of wetland plant seeds in the Middle Paraná River floodplain. We first studied seed dispersal by drifting macrophytes in the Paraná River main channel (MC), in a high discharge secondary channel (HD) and in two low discharge channels (LD) during an e
Acta Bot. Bras.. Publicado em: 18/07/2019
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18. A new species of whiptail armored catfish, genus Pseudohemiodon (Siluriformes: Loricariidae) from the Orinoco River basin, Llanos region of Colombia and Venezuela
ABSTRACT A new species of whiptail armored catfish belonging to the genus Pseudohemiodon is described. The new species inhabits aquatic systems of the Orinoco River basin, mostly in the Llanos region of Colombia and Venezuela. Previously, it had identified as P. laticeps erroneously. The genus Pseudohemiodon includes seven known species inhabit Amazon and Pa
Neotrop. ichthyol.. Publicado em: 18/07/2019
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19. Changes in physicochemical and toxicological parameters of waters of Trincheira's River caused by road construction
Resumo Infraestruturas rodoviárias podem afetar áreas naturais com grande intensidade. Um trevo e uma trincheira foram construídas na cidade de Francisco Beltrão-Paraná-Brasil sobre um corpo d'água chamado Rio da Trincheira. O objetivo do presente estudo foi avaliar a qualidade de suas águas, em termos físico-químicos e toxicológicos, em quatro pon
Rev. Ambient. Água. Publicado em: 18/07/2019
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20. Ichthyofauna of lotic environments in the Ivinhema river basin, upper Paraná river, Mato Grosso do Sul state, Brazil
Resumo: Com o objetivo de inventariar a riqueza de espécies e a composição da ictiofauna ao longo da bacia do rio Ivinhema, 232 trechos de rios e riachos foram amostrados de 2000 a 2018, utilizando uma peneira retangular, rede de arrasto, rede de espera, tarrafas e pesca elétrica. Ao todo 141 espécies foram amostradas na bacia, incluindo oito ordens e 3
Biota Neotrop.. Publicado em: 15/07/2019
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21. Schistosomiasis in the Middle Paranapanema river region, state of São Paulo, Brazil: Does it matter today for public health?
Abstract INTRODUCTION: The Middle Paranapanema watershed is known for the transmission of schistosomiasis, and there have been autochthonous cases since 1952. This study aimed to describe this disease in space and time and evaluate its current importance as a public health problem. METHODS: Thematic maps showing the risk areas for transmission of schisto
Rev. Soc. Bras. Med. Trop.. Publicado em: 27/06/2019
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22. An assessment of the factors determining rotifer assemblage in river-lake systems: the effects of seasonality and habitat
ABSTRACT Zooplankton exhibit several trends of variation in space and time, and these trends can be more evident in natural environments without anthropic perturbations. Examples of anthropic factors are climate change, eutrophication and construction of reservoirs. This study evaluated the influence of three factors - seasonality, type of environment and th
Zoologia (Curitiba). Publicado em: 06/06/2019
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23. Chemical characterization of archaeological pottery of the Lower Paraná River
Resumo Este artigo analisou a composição mineralógica da cerâmica arqueológica produzida por populações de caçadores-coletores e horticultores do Holoceno tardio na parte baixa da bacia do Paraná. Para analisar a composição química dos fragmentos foi utilizado um espectrômetro de fluorescência de raios X de energia dispersiva. Os resultados obt
Cerâmica. Publicado em: 06/06/2019
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24. Temporal changes in biological traits of diatom communities in response to an oil spill in a subtropical river
Abstract: Diatom growth strategies, which are used as a proxy to analyze disturbances and environmental impacts, can also provide reliable information about environmental gradients. In this study, we used diatom communities and biological traits to assess the structure of epilithic diatoms after an oil spill in a large tributary of the Iguaçu River (Paraná
An. Acad. Bras. Ciênc.. Publicado em: 23/05/2019