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| Registros recuperados: 11 | |
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| Durães,Renata; Pompeu,Paulo dos Santos; Godinho,Alexandre Lima. |
| The study reports the changes ocurred in feeding ecology of fish species during a tropical river reservoir formation. It was analysed the stomachal contents of 399 individuals belonging to four species of genus Leporinus (L. elongatus Valenciennes, 1849, n=157; L.friderici (Bloch, 1794), n=87; L. octofasciatus Steindachner, 1917, n=107; L.amblyrhynchus Garavello & Britski, 1987, n=48) during formation of Nova Ponte reservoir, State of Minas Gerais, Brazil, in 1993 and 1994. Specimens were separated by sampling period, according with the rate of filling of the reservoir, and standard lenght classes. The species had included in diet vegetal and animal items of autochtone and alochtone origin in several proportions. L. amblyrhynchus fed on basically... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leporinus; Diet; Trophic overlap; Reservoir; Southeast Brazil. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212001000100019 |
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| Pompeu,Paulo dos Santos; Alves,Carlos Bernardo Mascarenhas. |
| Lagoa Santa is a shallow permanent lake, located in Belo Horizonte metropolitan region, Brazil. In this study, the loss in fish diversity of the lake over the past 150 years is evaluated. Local extinction of almost 70% of the original fish fauna is described. Probably, the main causes of this richness loss were: obstruction of natural communication with rio das Velhas, non-native species introduction, change in the water level, organic pollution, and elimination of littoral and submerged vegetation. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rio das Velhas; Lagoa Santa; Urbanization; Habitat destruction; Species introduction; Historical diversity loss. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252003000200008 |
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| Pompeu,Paulo dos Santos; Godinho,Hugo Pereira. |
| In the Neotropics, a large proportion of fish communities of large rivers use floodplain as habitats for feeding, reproduction, and refuge. An evaluation was made of the effects of extended dry periods on the species richness, abundance and local extinction of fish species in three marginal lagoons in the middle São Francisco River, southeastern Brazil. The studied lagoons fail to receive river floods during the study period (1994-1996). A gradual reduction in richness and abundance was observed in all lagoons. Migratory fish species had the highest probability to become extinct in the two lagoons that remained with large water volume. Species tolerant to low levels of dissolved oxygen had the lowest probability of local extinction in the lagoon showing an... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Floodplain; Migratory fish; Extended drought; Hypoxia. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000400006 |
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| Pompeu,Paulo dos Santos; Reis,Liana Sisi dos; Gandini,Cíntia Veloso; Souza,Rafael Couto Rosa de; Favero,Jana Menegassi del. |
| Although the rio Capivari basin is recognized as an area of great importance for the ichthyofauna, it lacks virtually every basic requirement for the definition of appropriate conservation strategies, since not even its species composition is known. The objective of this work is to determine the composition and distribution of fish species in the upper rio Capivari basin, relating them to the local physical features, and to evaluate the effectiveness of proposed conservations units, delimited based on areas of native vegetation remains, on the conservation of local ichthyofauna. During 2007, 50 different watercourses were sampled with gillnets, cast nets and kick nets. A total of 1308 individuals belonging to 41 species were captured. Degree of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conservation units; Altitudinal gradients; Rio Grande; Reserve design. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000400015 |
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| Pompeu,Paulo dos Santos; Godinho,Alexandre Lima. |
| Two piscivorous fishes, peacock bass (Cichla monoculus Spix & Agassiz, 1831) (Perciformes) and piranha (Pygocentrus nattereri Kner, 1860) (Characiformes), were introduced in some Rio Doce valley lakes (19º50'S, 42º40'W) for sport fisheries enhancement. As a consequence, small individuals and species were practically vanished in the host lakes. In this study, the effects of peacock bass and piranha introductions on the diet of a native piscivorous fish, the trahira - Hoplias malabaricus (Bloch, 1794) are presented. Trahira's diet from three lakes were was compared with the stomach contentsdiet of trahira's living in another between three lakes with and three withoutstocked with the piscivorous species peacock bass and piranha. In the lakes with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cichla; Pygocentrus; Hoplias malabaricus; Diet; Species introduction. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000400016 |
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| Favero,Jana Menegassi del; Pompeu,Paulo dos Santos; Prado-Valladares,Ana Carolina. |
| Com o principal objetivo de fornecer ferramentas para auxiliar na implementação do manejo sustentável de peixes ornamentais na Reserva de Desenvolvimento Sustentável Amanã, Amazonas, foi realizado o estudo da biologia reprodutiva de Heros efasciatus Heckel, 1840, um ciclídeo com potencial ornamental e com poucos trabalhos sobre a sua biologia e ecologia, apesar de já ser comercializado em algumas regiões amazônicas. Coletas bimestrais foram realizadas de fevereiro de 2006 a janeiro de 2007 em dez igarapés contribuintes do Lago Amanã e Urini, sendo utilizados três aparelhos de pesca (rede de arrasto, rapiché e armadilha tipo matapi) e ainda galhadas artificiais nas amostragens realizadas próximas aos lagos. Foram capturados 140 exemplares de H. efasciatus,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazonas; Cichlidae; Peixe ornamental; Reprodução de peixes. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672010000200015 |
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| Fagundes,Daniela Cristina; Leal,Cecília Gontijo; Carvalho,Débora Reis de; Junqueira,Nara Tadini; Langeani,Francisco; Pompeu,Paulo dos Santos. |
| This study aimed to conduct an inventory of fish assemblages in small streams that are tributaries of large reservoirs in three previously unstudied regions of the Upper Paraná River basin. We sampled 117 streams from 1st to 3rd order in Araguari (Nova Ponte hydropower plant reservoir), Paranaíba (São Simão reservoir) and Grande (Volta Grande reservoir) drainages. In total, 20,696 specimens belonging to 100 species, 53 genera, 20 families and six orders were collected. Of these, 11,530 specimens and 41 species were recorded in Araguari, whereas 17 were exclusive to this drainage. In Grande drainage, 3,537 individuals belonging to 41 species (11 exclusive) and in Paranaíba, 5,629 specimens and 67 species (38 exclusive) were sampled. The mean richness per... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish; Species inventory; New species. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032015000200203 |
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| 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 |
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| Registros recuperados: 11 | |
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