Consulta: creatorFacets:"Baumgartner,Gilmar"
Registros recuperados: 15
Data/hora: 01/06/2024 00:43:39

Variação espacial e temporal dos fatores limnológicos em riachos da microbacia do rio São Francisco Verdadeiro
Provedor de dados: 70
Autores: Oliveira,Luciano C. de; Gomes,Benedito M.; Baumgartner,Gilmar; Sebastien,Nyamien Y.
Com objetivo de caracterizar espacial e temporalmente os riachos da microbacia do rio São Francisco Verdadeiro, Marechal Cândido Rondon - PR, em função de fatores limnológicos, foram estabelecidas seis estações de coleta em três riachos (Curvado, Ajuricaba e Arroio Fundo), sendo uma estação na foz e outra na nascente. As coletas de água foram obtidas entre junho de 2005 e maio de 2006, totalizando 72 amostras. Foram analisadas as seguintes variáveis: temperatura, pH, condutividade elétrica, oxigênio dissolvido, turbidez, material em suspensão, fósforo total dissolvido, ortofosfato, nitrogênio total e nitrogênio amoniacal. De acordo com a análise de variância, houve baixa variabilidade entre as estações de coleta, porém a variação temporal demonstrou a...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Variáveis físicas e químicas; Limnologia; Material alóctone.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162008000400017

Iheringichthys labrosus (Siluriformes: Pimelodidae) in the Piquiri River, Paraná, Brazil: population structure and some aspects of its reproductive biology
Provedor de dados: 83
Autores: Holzbach,Arlei J.; Gubiani,Éder A.; Baumgartner,Gilmar.
The purpose of this study was to analyze the population structure (spatial and temporal distribution, sex ratio, length distribution and length/weight relationship) and reproductive biology of Iheringichthys labrosus. This species is of importance as fisheries resource in the Paraná River basin. Fish were sampled, bimonthly, with gill and trammel nets at three sampling sites (Campina, Apertado and Altônia), located in the Piquiri River, between November 2002 and September 2003. In this study, 164 individuals were collected; the largest capture occurred in Campina site, with 209.88 individuals/1000 m² of net for 24 hours, while the shift of largest capture was night time (N) and the month was July. Females occurred in larger numbers than males in all...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish reproduction; Population dynamics; Upper Paraná River; Tributary.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000100008

Fish larvae assemblages in two floodplain lakes with different degrees of connection to the Paraná River, Brazil
Provedor de dados: 83
Autores: Daga,Vanessa Salete; Gogola,Tatiane Mary; Sanches,Paulo Vanderlei; Baumgartner,Gilmar; Baumgartner,Dirceu; Piana,Pitágoras Augusto; Gubiani,Éder André; Delariva,Rosilene Luciana.
The objective of this study was to assess the abundance, attributes of assemblages, and spatial and temporal distributions of fish larvae and their relationships with some abiotic variables in two floodplain lakes with different degrees of connection to the Paraná River in Ilha Grande National Park, PR, Brazil. Four sampling sites were chosen, two in each floodplain lake. Night samples were taken with plankton nets during three spawning seasons (monthly, from October to March) from 2001 to 2005. The highest diversity and abundance were recorded at Saraiva Lake, with 25 taxa being identified. In Xambrê Lake, only sedentary species were captured, and the most abundant species were Plagioscion squamosissimus and Hypophthalmus edentatus. The greatest abundance...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ichthyoplankton; Fish reproduction; Parque Nacional de Ilha Grande; Upper Paraná River.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000300010

Foraging behavior interactions between the invasive Nile Tilapia (Cichliformes: Cichlidae) and three large native predators
Provedor de dados: 83
Autores: Birck,Tiago; Message,Hugo José; Baumgartner,Gilmar; Sebastien,Nyamien Yahaut; Baumgartner,Dirceu.
ABSTRACT The predator-prey relationships between juvenile Nile Tilapia Oreochromis niloticus and native fish species of the Paraná River basin, Brazil, were experimentally examined. Juveniles of O. niloticus were offered to three native predator species (Salminus brasiliensis, Pseudoplatystoma corruscans, and Brycon orbignyanus) in 2,000-L tanks with four levels of habitat complexity (0%, 50%, 100% and RD (rocks and driftwood)). Predator efficiency was more variable among species (S. brasiliensis consumed 86.6% of the prey, P. corruscans 22.5% and B. orbignyanus 18.3%) than among levels of habitat complexity, and S. brasiliensis was faster than the others in detecting and consuming the prey. The higher predatory efficiency observed for S. brasiliensis can...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Invasion; Management; Oreochromis niloticus; Predation; Prey.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000300204

Effects of abiotic variables on the distribution of fish assemblages in streams with different anthropogenic activities in southern Brazil
Provedor de dados: 83
Autores: Daga,Vanessa Salete; Gubiani,Éder André; Cunico,Almir Manoel; Baumgartner,Gilmar.
Studies on fish assemblages in streams point out, that understanding the relationship between species and their environment is crucial for conservation. The present study aimed at evaluating the effects of changes in abiotic variables on the composition and structure of fish assemblages in Neotropical urban streams from southern Brazil with different levels of urbanization. The composition and structure of fish assemblages showed significant differences along the urbanization gradient observed in the streams. Tolerant and non-native species were found in more urbanized sites. A matrix correlation revealed a relationship between abiotic variables and the spatial pattern of structure and composition of fish assemblages. Abiotic variables, such as total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Abiotic variables; Anthropogenic effects; Ichthyofauna; Urbanization.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000300018

Spatial and temporal distribution patterns of ichthyoplankton in a region affected by water regulation by dams
Provedor de dados: 83
Autores: Gogola,Tatiane M; Daga,Vanessa S; Silva,Pedro R. L. da; Sanches,Paulo V; Gubiani,Éder A; Baumgartner,Gilmar; Delariva,Rosilene L.
The aim of this work was to study the occurrence of ichthyoplankton in a region affected by water regulation by dams. The study area was located in the region of Ilha Grande National Park, upper Paraná River floodplain. Specifically, we examined the temporal and spatial distribution of Ichthyoplankton, identified spawning areas and established the relationships between the abundances of fish eggs and larvae and some limnological and hydrological variables. Samples were taken monthly between October and March from 2001 to 2005 at 24 sampling sites. For analytical purposes, the sampling sites were grouped into upper, middle and lower areas. The upper area of the National Park had the highest egg density and should be considered the primary spawning area. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ichthyoplankton; Ilha Grande National Park; Fish distribution; Fish spawning.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252010000200013

Fish larvae from the upper Paraná River: do abiotic factors affect larval density?
Provedor de dados: 83
Autores: 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

Larval development of Plagioscion squamosissimus (Heckel) (Perciformes, Sciaenidae) of Itaipu reservoir (Paraná river, Brazil)
Provedor de dados: 104
Autores: Nakatani,Keshiyu; Baumgartner,Gilmar; Baumgartner,Maria do Socorro T.
The aim of the present study was to characterize the larval development of Plagioscion squamosissimus (Heckel, 1840) morphometrically, collected at Itaipu reservoir from March 1988 to April 1990. It was obtained the samples monthly, with a conic-cylindrical plankton net with 0.5mm mesh. The morphological description of the larvae of P. squamosissimus was based on different stages of development. The specimens less than 6mm long present a moderate sized head and those that are larger than this length, present a large head. The pectoral fins are in an elevated position, near the operculum bones, and the ventral fins are in thoracic positions, the body has a moderate height, the eyes are small to moderate and the mouth is large with caniniform teeth. This...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plagioscion squamosissimus; Fish larvae; Morphology; Larval development; Itaipu.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000100003

Morphological description of larvae of the Mapará Hypophthalmus edentatus (Spix) (Osteichthyes, Hypophthalmidae) in the Itaipu reservoir (Parana River, Brazil)
Provedor de dados: 104
Autores: Nakatani,Keshiyu; Baumgartner,Gilmar; Latini,João Dirço.
The ontogenetic aspects of larvae of Hypophthalmus edentatus (Spix, 1829) from the ichthyoplankton samples collected in the Itaipu reservoir between March 1988 and April 1990 were analysed. Sample were caught by 0.5 mm mesh conic-cylindrical plankton net. Larvae of H. edentatus were identified and described as Siluriforms from the morphological and morphometric development series. They have a small to medium-sized head, long body, small eyes, little pigmentation, mandibular barbules and 53 to 56 myomeres. High values obtained with correlation coefficient (r &gt; 0.97; p &lt; 0.001) show that growth was proportional in different parts of the body.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hypophthalmus edentatus; Fish larvae; Itaipu reservoir; Larval development; Paraná River.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000300013

Occurrence of Macrobrachium amazonicum (Heller) (Decapoda, Palaemonidae) in Leopoldo's inlet (Ressaco do Leopoldo), upper Paraná River, Porto Rico, Paraná, Brazil
Provedor de dados: 104
Autores: 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

Some aspects of the ecology of fish larvae in the floodplain of the high Paraná river, Brazil
Provedor de dados: 104
Autores: Baumgartner,Gilmar; Nakatani,Keshiyu; Cavicchioli,Maristela; Baumgartner,Maria do Socorro Tenório.
The spatial and temporal distribution and nychthemeral variation of fish larvae in six stations (Ivinhema, Patos, Paraná, Cortado, Baía and Guaraná) in the floodplain of the high Paraná river are provided. The paper also provides the relationship of this distribution to some environmental factors. From March 1992 to February 1993 ichthyoplanktonic samples were collected by conic cylindrical nets, with 0.5mm of mesh size and fluxometer attached, in 10-minute hauls at the surface and bottom during nychthemeral cycles. At the same time water samples were taken to determine environmental factors. During the above period 5,672 larvae were collected: 57,6% from Cortado station and 13,2% from Ivinhema and Paraná stations. The greatest densities were recorded...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish larvae; Ecology; Distribution; Floodplain; Paraná river.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000300005

Caracterização morfológica e distribuição temporal de larvas e juvenis de Apareiodon affinis (Steindachner) (Osteichthyes, Parodontidae) no alto rio Paraná, Paraná
Provedor de dados: 104
Autores: 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

Fish fauna of the Pelotas River, Upper Uruguay River, southern Brazil
Provedor de dados: 49
Autores: Delariva,Rosilene Luciana; Neves,Mayara Pereira; Baumgartner,Gilmar; Baumgartner,Dirceu.
Abstract: The fish fauna of the Pelotas River, in the Upper Uruguay ecoregion of southern Brazil was inventoried. Samplings were performed quarterly between August 2013 and May 2014 at 14 sites in the Pelotas River and its tributaries, using gill nets of different mesh sizes, sein nets, cast nets and electrofishing. In total, 7,745 specimens were recorded, comprising 46 species, belonging to 13 families and five orders. Approximately 80% of the species belonged to the orders Characiformes and Siluriformes, as well as the families Characidae and Loricariidae, which included a greater number of species. Of the total species, 24% were endemic to the Upper Uruguay River, four were identified only at the genus level and none was considered non-native....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Freshwater; Upland river; Ichthyofauna; Inventory; Species richness.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000300308

Desenvolvimento inicial de Pyrrhulina australis Eigenmann &amp;amp; Kennedy, 1903 (Characiformes, Lebiasinidae)
Provedor de dados: 49
Autores: 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 &amp;amp; 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

Drift of ichthyoplankton in two channels of the Paraná River, between Paraná and Mato Grosso do Sul states, Brazil
Provedor de dados: 52
Autores: 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