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| Registros recuperados: 13 | |
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| Kipper,Darlon; Bialetzki,Andréa; Santin,Miriam. |
| Em reservatórios, são escassos os estudos que consideram as fases iniciais do ciclo de vida de peixes, sendo que informações sobre a ecologia de larvas de peixes são úteis para o entendimento da biologia das espécies, visto que os estágios iniciais representam um período crítico no ciclo de vida dos peixes. Neste contexto, o conhecimento a respeito das assembleias de larvas pode ser valioso para a predição e o entendimento do recrutamento, auxiliando desta maneira, no manejo do ambiente. Desta forma, o presente trabalho pretende verificar a composição da assembleia de larvas de peixes em diferentes regiões do reservatório. As coletas foram realizadas trimestralmente (março, junho, setembro e dezembro) no ano de 2002, nas regiões limnética e litorânea das... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Ictioplâncton; Região limnética; Região litorânea; Reservatório. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000100039 |
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| Taguti,Tatia Leika; Kipper,Darlon; Bialetzki,Andréa; Sanches,Paulo Vanderlei; Makrakis,Maristela Cavicchioli; Baumgartner,Gilmar; Fernandes,Rodrigo. |
| Este trabalho descreve o desenvolvimento inicial de Pyrrhulina australis Eigenmann & Kennedy, 1903, o único Lebiasinidae da planície alagável do Alto Rio Paraná. Para isso, foram analisados 80 indivíduos, sendo 60 larvas e 20 juvenis, coletados entre os anos de 1992 e 2005, em vários ambientes (rios, canais e lagoas). De cada exemplar, foram obtidos dados morfométricos e merísticos e, posteriormente, o padrão de crescimento entre as variáveis morfométricas foi analisado. As larvas apresentaram grande concentração de pigmentos na região superior do intestino, da cabeça e ao redor da boca. A notocorda foi caracterizada por possuir um prolongamento que, posteriormente, diferenciou-se em um raio da nadadeira caudal. A seqüência de formação das... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Charutinho; Ontogenia; Larvas; Juvenis; Rio Paraná. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032009000400006 |
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| Bialetzki,Andréa; Sanches,Paulo Vanderlei; Cavicchioli,Maristela; Baumgartner,Gilmar; Ribeiro,Ricardo Pereira; Nakatani,Keshiyu. |
| Analysis of drift of ichthyoplankton in two channels in the River Paraná, Brazil, were made. Sampling was undertaken from October 1995 to April 1996 during nychthemeral cycles. Water samples were collected to determine several environmental variables. Eggs densities largely differed to layers, times of day and months. In both the channels, highest occurrence of eggs was detected between January and March; greater concentrations at the bottom, during night. With regard to larvae, densities were significantly different in channels, times of days and months. Maximum occurrences were seen in the right channel, in both layers, with largest capture between January and March. Surface of the both channels presented highest density of larvae during night. Water... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Drift; Ichthyoplankton; Paraná River. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000100008 |
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| Oliveira,Fernando G. de; Bialetzki,Andréa; Gomes,Luiz C.; Santin,Miriam; Taguti,Tátia L.. |
| O presente estudo caracterizou o desenvolvimento inicial de Brycon hilarii (Valenciennes, 1850) através de caracteres morfométricos e merísticos e analisou as relações entre as características morfométricas das larvas ao longo do desenvolvimento usando modelos de regressão linear, quadrática e linear por partes. O material foi obtido nas bacias dos rios Cuiabá e Manso, Mato Grosso, Brasil, entre março de 2000 e março de 2004. Os indivíduos foram identificados e separados de acordo com o grau de desenvolvimento da notocorda e, posteriormente, medidos e contados os caracteres morfométricos e merísticos, respectivamente. O comprimento padrão variou entre 3,25 e 26,00 mm. Inicialmente, as larvas apresentaram maior concentração de pigmentos dendríticos ao longo... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Morfologia; Larva; Peixe; Piraputanga; Bacia do rio Paraguai. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212012000100009 |
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| Teixeira,Gabriel E.; Bialetzki,Andréa; Soares,Bruno E.; Souza,Guilherme; Caramaschi,Érica P.. |
| ABSTRACT The Paraíba do Sul River is affected by extensive water collection for supply, organic and industrial pollution, and dams. Nonetheless, the ichthyofauna maintains biodiversity and sustains artisanal fisheries. This study analyzes the composition, abundance and distribution of fish larvae, an important approach to determine the reproductive period and spawning sites. The sampling occurred from August 2011 through February 2013 in five sites at a transect between the banks on the lower reach of the Paraíba do Sul River. A total of 5,412 larvae belonging to 20 taxa was captured. The predominant order was Characiformes. Larvae of Prochilodus spp. and Leporinus spp. were the most abundant; larvae of Brycon insignis, an endangered species, were present.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Drought; Eggs and larvae; Migratory species; Reproductive period; Spawning area. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000500208 |
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| Ziober,Simoni Ramalho; Bialetzki,Andréa; Mateus,Lúcia Aparecida de Fátima. |
| Researches on ichthyoplankton seems to be an important tool to identification of spawning areas and periods for freshwater fish. Ichthyoplankton was sampled monthly in the headwaters of the Cuiabá River, upper Paraguay River basin, (Mato Grosso State, Brazil), and in four of its tributaries, between November 2007 and March 2008, to evaluate the spatial and temporal distribution of fish eggs and larvae and the influence of regional and local variables on their distribution. In total, 22,067 eggs and 1,045 larvae were collected. A significant negative correlation was found between egg density and the variables of river level and flow volume. Larval density was not significantly correlated with any of the regional variables. The egg and larval densities were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Freshwater fishes; Ichthyoplankton; Spatial-temporal distribution; Upper Paraguay basin. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000100012 |
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| Baumgartner,Gilmar; Nakatani,Keshiyu; Gomes,Luiz Carlos; Bialetzki,Andréa; Sanches,Paulo Vanderlei; Makrakis,Maristela Cavicchioli. |
| The purpose of this study was to evaluate the role of abiotic factors on fish larvae occurrence. Samplings were carried out monthly at 12 stations (grouped in four areas) in the Amambaí, Ivaí and Paraná rivers and in the Itaipu Reservoir (upper Paraná River basin), from October 1994 to January 1995 (spawning season). Simultaneously, we obtained water temperature, pH, electrical conductivity, dissolved oxygen, water level, water velocity, and rainfall. Principal Component Analyses (PCA) and Detrended Correspondence Analyses (DCA) were applied to summarize abiotic and larvae density data, respectively. Amambaí River differed significantly from the other areas in relation to abiotic factors. Itaipu Reservoir differed significantly from the other areas... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Larval ecology; Spatial distribution; Floodplain; Itaipu reservoir; Larval drift. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000400002 |
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| Baggio,Rafael A.; Moretti,Caroline B.; Bialetzki,Andréa; Boeger,Walter A.. |
| ABSTRACT The production of hybrids of the 'pintado', Pseudoplatystoma corruscans (Spix & Agassiz, 1829) and 'cachara', Pseudoplatystoma reticulatum (Eigenmann & Eigenmann, 1889) in captivity has generated many concerns about the possibility of introduction of farmed hybrids into natural environments. In the last decade, hybrids between these species, known as 'pintachara' or 'cachapinta', were reported from different regions of the Upper Paraná River basin. Prospection of these hybrids is important in order to orient conservation programs for the species involved. Knowledge of the presence of these hybrids will direct conservation strategies towards prevention and/or mitigation of the effects of cross breeding in natural populations of P.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conservation genetics; Fish larvae; Interspecific hybrids; Introgression; Molecular markers. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702016000201303 |
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| Barzotto,Evelyn; Sanches,Paulo Vanderlei; Bialetzki,Andréa; Orvati,Lilian; Gomes,Luiz Carlos. |
| ABSTRACT Fish larvae and adults are morphologically distinct from each other and have different ecological requirements. Research on the dynamics of ichthyoplankton provides valuable information about the early stages of the life cycle of fish. This study analyzed the temporal and spatial distribution of the larval stages of three migratory species - Salminus brasiliensis (Cuvier, 1816), Prochilodus lineatus (Valenciennes, 1836) and Pseudoplatystoma corruscans (Agassiz, 1829) - to identify possible spawning areas in the last lotic remnant of the upper Paraná River, in the Brazilian territory. A total of 26 points were sampled monthly from October 2003 to November 2004. The PERMANOVA detected significant differences between the months only for S.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ichthyoplankton; Prochilodus lineatus; Pseudoplatystoma corruscans; Salminus brasiliensis; Upper Paraná River. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000400270 |
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| Bialetzki,Andréa; Sanches,Paulo Vanderlei; Baumgartner,Gilmar; Nakatani,Keshiyu. |
| With the purpose of characterizing morphologicaly the larvae and juveniles of Apareiodon affinis (Steindachner, 1879) and to verify their temporal distribution monthly samples were taken at Leopoldo's Inlet, upper Paraná River. The specimens were captured with a conic-cylindrical plankton net of mesh size 0,5mm from March 1991 to February 1992. Soon after identification, the specimens were separeted according to their development (prefle-xion, flexion, posflexion and juvenile) and then the moiphometric analyses were performed. The results showed that the larvae were captured from August 1991 to February 1992, with greatest densities in November 1991. The specimens occured in every timetable, however, larvae in pretlexion and flexion were captured during... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apareiodon affinis; Morphological development; Temporal distribution; Upper Paraná River. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000400021 |
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| Bialetzki,Andréa; Nakatani,Keshiyu; Baumgartner,Gilmar; Bond-Buckup,Georgina. |
| Studies on the occurrence, temporal distribution and nychthemeral variation of Macrobrachium amazonicum (Heller, 1862) were undertaken in Leopoldo's Inlet, upper Paraná River, Porto Rico, Paraná, Brazil. Seventeen thousand and sixty specimens (11,786 larvae and 5,274 juveniles) were captured with a conicalcylindrical plankton net of mesh 0.5mm in monthly samples between February 1991 and February 1992. Results show that the greatest densities of larvae (301.83 larvae/10m³) and juveniles (168.8/10m³) of this species were caught in December 1991. Largest captures were made during the night. With regard to abiotic factors water temperature ranged from 20º to 30ºC, pH ranged from 5.66 to 7.37 and electric conductivity ranged from 51.83 to 65.33µS/cm.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Decapoda; Palaemonidae; Macrobrachium amazonicum; Temporal distribution; Nychthemeral variation; Paraná River. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000200011 |
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| Registros recuperados: 13 | |
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