Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados Neotropical Ichthyology (4) BABT (1) Autor Martinez,Carlos Barreira (5) Pompeu,Paulo dos Santos (3) Santos,Hersília de Andrade e (2) Haselbauer,Matthias A. (1) Horta,Luiz Felipe Mascarenhas (1) Pompeu,Paulo Santos (1) Viana,Edna Maria de Faria (1) Mais... Palavra-chave Fishway (2) Air entrainment (1) Computational fluid dynamics (1) Critical speed (1) Dams (1) Downstream fish passage (1) Experimental apparatus (1) Fish ladders (1) Fish mortality (1) Hydro acoustic noise (1) Ichthyofauna (1) Labyrinth flow (1) Leporinus reinhardti (1) Macrozoobenthos (1) Mucuri River (1) Pimelodus maculatus (1) Pressure effects on fish (1) Prochilodus costatus (1) Prolonged speed (1) Reservoir Management (1) Mais... Tipo do documento Info:eu-repo/semantics/article (4) Info:eu-repo/semantics/report (1) Ano 2012 (1) 2009 (1) 2007 (3) País Brazil (5) Idioma Inglês (5)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 5 Primeira ... 1 ... Última Evaluation of the effects of pressure gradients on four Brazilian freshwater fish species BABT Pompeu,Paulo dos Santos; Horta,Luiz Felipe Mascarenhas; Martinez,Carlos Barreira. This work aimed to experimentally evaluate the behavior of Brazilian freshwater fish species when submitted to a gradual increase in pressure, as well as sudden decompression's effects simulating the passage through a hydroelectric turbine. Four species from the São Francisco river basin were tested: Astyanax bimaculatus, Hypostomus sp., Leporinus reinhardti and Prochilodus costatus. For all of them mortality rates due to decompression were extremely low. However, the symptoms related to decompression, such as bulged eyes and hemorrhage, were not observed only in Hypostomus sp., and were more frequent the larger the pressure values were, considering the values from which decompression was performed. All these symptoms decreased significantly after 24 h of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Downstream fish passage; Dams; Experimental apparatus; Fish mortality; Pressure effects on fish. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000100015 Swimming performance of the migratory Neotropical fish Leporinus reinhardti (Characiformes: Anostomidae) Neotropical Ichthyology Santos,Hersília de Andrade e; Pompeu,Paulo dos Santos; Martinez,Carlos Barreira. The fishways built in Latin America were mainly based on those used in the northern hemisphere for passing salmonids upstream. However, the swimming capacity in terms of speed and endurance is a major factor concerning the design of a fishway, and this information is not available for migratory neotropical fish species. Therefore, studies on swimming performance of neotropical species is fundamental. The aim of this study was to estimate the critical, sustained and prolonged speeds for the piau-três-pintas Leporinus reinhardti, and to evaluate the influence of water temperature on the swimming performance of the species. Variable (increasing) and fixed velocity tests were performed in a respirometer. When compared to other species whose critical speed data... Tipo: Info:eu-repo/semantics/article Palavras-chave: Prolonged speed; Critical speed; Sustained speed; Fishway. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000200007 Optimal swim speeds by respirometer: an analysis of three neotropical species Neotropical Ichthyology Santos,Hersília de Andrade e; Viana,Edna Maria de Faria; Pompeu,Paulo Santos; Martinez,Carlos Barreira. The swimming ability of neotropical fish species is an important aspect for fish ladder designs. Especially in Latin America, where fish ladders are highly selective, fish strategies to negotiate the passage should be studied focusing on target species. This paper shows the swimming ability of three neotropical species (Leporinus reinhardti, Pimelodus maculatus and Prochilodus costatus), from São Francisco river basin. Respirometer was employed for data collection. Regarding the critical and prolonged speeds, L. reinhardti was the fastest among the three neotropical species in relative values (body length/second). The performance of neotropical species was better when compared to critical and maximum prolonged speeds of fish species from temperate areas.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish ladders; Leporinus reinhardti; Pimelodus maculatus; Prochilodus costatus; Swimming ability. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000400013 Proposal of a sluice-type fish pass Neotropical Ichthyology Haselbauer,Matthias A.; Martinez,Carlos Barreira. One-dimensional design of fish passes often leads to an unsatisfying solution. The problems are due to insufficient, if not completely missing, collaboration between biologists and civil engineers. In the present paper, a new type of fish pass is presented. A labyrinth flux develops in a system of sequential sluices and baffles in between, which uncouple the supercritical flow of the single sluices. A series of biological, hydraulic and numerical experiments was carried out in order to investigate the optimum configuration in terms of geometric issues, regarding the biological needs and performances of organisms to be transported. Following this optimization, fish can control the prevailing flow conditions quite well. Because the air entrainment into the... Tipo: Info:eu-repo/semantics/report Palavras-chave: Air entrainment; Labyrinth flow; Computational fluid dynamics; Macrozoobenthos; Hydro acoustic noise. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000200017 Efficiency and selectivity of a trap and truck fish passage system in Brazil Neotropical Ichthyology Pompeu,Paulo dos Santos; Martinez,Carlos Barreira. The construction of fish passages has been one of the strategies adopted by the Brazilian energy sector in order to diminish the effects of barriers on fish communities. However, studies of the efficiency of these mechanisms are scarce. The present study evaluated the efficiency and selectivity of the first trap and truck fish passage system in Brazil, installed in Santa Clara Dam, Mucuri River. The species composition in the Santa Clara Dam fish lift was compared to the original composition of Mucuri River fish fauna and with the populations that gather downstream of the dam during the reproductive season. The proportion of previously tagged individuals translocated by the lift was used to estimate its efficiency. During the 2003/2004 reproductive period,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Fishway; Mucuri River; Ichthyofauna; Reservoir Management. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000200011 Registros recuperados: 5 Primeira ... 1 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco