11 documents found, page 1 of 2
Responses of the zooplankton community to the formation of a small reservoir on...
Picapedra, Pablo Henrique dos Santos; Fernandes, Cleomar; Baumgartner, Gilmar; Sanches, Paulo VanderleiWe investigated changes in the species richness, abundance, and composition of the zooplankton community in response to the formation of a small reservoir in the Caveiras River, southern Brazil. Zooplankton were collected using a motor-pump and a plankton net (68 μm mesh), with 600 L of water filtered per sample. Sampling occurred during the pre- (April, August, and December 2011) and post-impoundment (July and...
Desenvolvimento inicial e distribuição temporal de larvas e juvenis de Bryconam...
Galuch, André Vieira; Suiberto, Mirian Rodrigues [UNESP]; Nakatani, Keshiyu; Bialetzki, Andréa; Baumgartner, GilmarSubmitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-27T11:20:41Z No. of bitstreams: 0Bitstream added on 2014-05-27T14:44:53Z : No. of bitstreams: 1 2-s2.0-23444433624.pdf: 468642 bytes, checksum: 0d8183499fd8d35638d2ff901a89e2c6 (MD5); Made available in DSpace on 2014-05-27T11:20:41Z (GMT). No. of bitstreams: 0 Previous issue date: 2003-07-01; The aim of this paper was to analyz...
Peixes do baixo rio Iguaçu
Baumgartner, Gilmar; Pavanelli, Carla Simone; Baumgartner, Dirceu; Bifi, Alessandro Gasparetto; Debona, Tiago; Frana, Vitor AndréO rio Iguaçu nasce na confluência dos rios Atuba e Irai, e desemboca no rio Paraná, em Foz do Iguaçu. A ictiofauna deste rio, desde os primeiros trabalhos realizados, sempre foi considerada pobre e de pequeno porte, entretanto, apresenta um elevado grau de endemismo favorecido pelo surgimento das Cataratas do Iguaçu, que exerceram um papel fundamental neste processo. Esta obra busca uma fonte aglutinadora, mas ...
Comparison between the index of biotic integrity and a method of multicriteria ...
Fernandes, Cleodimar; Volpi, Neida Maria Patias; Baumgartner, GilmarThe human activities have been exercising deep and, usually, negative influence on the water bodies. Some negative effects are due to the pollutant while others are associated to the hydrology changes of the basin, habitat modifications and energy sources alterations. In many situations the decision about the environmental involves selection of alternatives, events or actions. However, those decisions usually, ...
Early development of Hoplias aff. malabaricus (Bloch, 1794) (Osteichthyes, Eryt...
Bialetzki, Andréa; Nakatani, keshiyu; Sanches, Paulo Vanderlei; Baumgartner, Gilmar; Makrakis, Maristela Cavicchioli; Taguti, Tátia LeikaThe aim of this study was to characterize the early development of Hoplias aff. malabaricus. The sampling was conducted during the period from November 1991 through February 1995, at 42 stations distributed in different environments of the upper Paraná river floodplain, Brazil. The specimens were taken from limnetic and littoral regions. Specimens were separated according to their development in larval (preflex...
Population characterization of Steindachnerina insculpta (Fernández-Yépez, 1948...
Holzbach, Arlei José; Baumgartner, Gilmar; Bergmann, Fernando; Rezende Neto, Leontino Borges de; Baumgartner, Dirceu; Sanches, Paulo VanderleiThe objective of this work was to analyze the spatial and temporal distribution, to establish the relationship between weight and length, to analyze the reproductive development and to determine the length distribution from Steindachnerina insculpta, this specie is very important in the river for prey fishes. The fishes were obtained in 6 collections, from October 2002 to September 2003, in 3 sampling stations ...
Initial development and temporal distribution of larvae and juveniles of Brycon...
Galuch, André Vieira; Suiberto, Mirian Rodrigues; Nakatani, Keshiyu; Bialetzki, Andréa; Baumgartner, GilmarThe aim of this paper was to analyze initial development and temporal distribution of larvae and juveniles of Bryconamericus stramineus and their relationship with some environmental variables of Ressaco do Leopoldo in the Upper Paraná River floodplain. The samples were taken from February 1991 to February 1992. The larvae and the juveniles were identified and described according to the with its morphologic and...
Temperature influence on the development of juvenile of Piapara (Leporinus cf. ...
Piana, Pitagoras Augusto; Baumgartner, Gilmar; Gomes, Luiz CarlosThe aim of this study was to analyze temperature effects on the performance of juveniles Leporinus cf. obtusidens (Valencienves, 1847) (Characiformes, Anostomidae), on the variation of the total length, total body weight, weight increase, relative weight and instantaneous growth rate. For this reason, from August to September of 2001, an experiment with controlled temperature (± 1ºC) was set up at 14, 18...
Early development of Auchenipterus osteomystax (Osteichthyes, Auchenipteridae) ...
Bialetzki, Andréa; Baumgartner, Gilmar; Sanches, Paulo Vanderlei; Galuch, André Vieira; Luvisuto, Marli Aparecida; Nakatani, KeshiyuThe aim of the present study was to characterize the early development of Auchenipterus osteomystax (Ribeiro, 1918) (Osteichthyes, Auchenipteridae). Specimens were taken from plankton samples in the Upper Paraná river, Ivaí river, Upper Ivinhema river and Itaipu Reservoir. Seventy-four larvae and seven juveniles (with standard length ranging from 5.25 mm to 39.0 mm) were analyzed. Specimens were identified and ...
Early development of Leporinus friderici (Osteichthyes, Anostomidae) from Paran...
Sanches, Paulo Vanderlei; Baumgartner, Gilmar; Bialetzki, Andréa; Suiberto, Mirian Rodrigues; Gomes, Fernando Duran Canedo; Nakatani, KeshiyuThe early development of Leporinus friderici (Bloch, 1794) is characterized in this research. Eggs and larvae were obtained from artificial spawning performed in Volta Grande hatchery (CEMIG), from February to March 1995. Juveniles were taken from samples of the Upper Paraná River Basin. Thirty eggs, 114 larvae and 21 juveniles were analyzed. Eggs are sphericals, transparents and non-adhesives, mean diameter 2....