Consulta: creatorFacets:"Shibatta,Oscar Akio"
Registros recuperados: 22
Data/hora: 02/06/2024 03:44:37

Development and characterization of microsatellite loci of Microglanis cottoides (Siluriformes: Pseudopimelodidae) and cross-species amplification
Provedor de dados: 83
Autores: Souza-Shibatta,Lenice; Ferreira,Dhiego Gomes; Oliveira,Claudio; Almeida,Fernanda Simões de; Shibatta,Oscar Akio; Sofia,Silvia Helena.
Thirteen microsatellite loci were isolated and characterized in Microglanis cottoides. Of these, two were monomorphic and 11 were polymorphic. These polymorphic loci tested on 24 individuals from a wild population produced a total of 108 different alleles, with levels of variability high, ranging from 2 to 20, with an average of 8.3 alleles per locus. The observed and expected heterozygosity ranged from 0.125 to 0.958 and from 0.119 to 0.931, respectively. A high combined probability of paternity exclusion value and a low probability combined genetic identity value obtained show that the set of loci described herein displays good suitability for paternity studies and differentiation of M. cottoides. Additionally, all thirteen microsatellite primers...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brazilian Eastern basin; Catfish; Enriched genomic library; Genetic marker; SSR.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000300581

Astyanax aff. fasciatus Cuvier, 1819 (Teleostei; Characidae): evidences of a species complex in the upper rio Tibagi basin (Paraná, Brazil)
Provedor de dados: 83
Autores: Artoni,Roberto Ferreira; Shibatta,Oscar Akio; Gross,Maria Claudia; Schneider,Carlos Henrique; Almeida,Mara Cristina de; Vicari,Marcelo Ricardo; Bertollo,Luiz Antonio Carlos.
Four populations of Astyanax aff. fasciatus of the upper rio Tibagi (municipal district of Ponta Grossa, Paraná State, Brazil), had their karyotypes and morphometry analyzed. The cytogenetic data show the occurrence of distinct karyotypes (cytotypes), here named cytotype A, with 2n=48 chromosomes (6m+18sm+14st+10a), cytotype B, with 2n=50 chromosomes (8m+18sm+14st+10a) and cytotype C, with 2n=50 chromosomes (8m+18sm+14st+10a). The distribution pattern of the constitutive heterochromatin was very similar between cytotypes A and B, but diverged in relation to cytotype C. Distinct cytotypes may occur in sympatry in the upper rio Tibagi region, with the exception of the Furna 2 sample, which presents cytotype A exclusively. In addition, a specimen with 2n=49...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tetra; Morphometrics; Karyotype; Sympatry; Cryptic species.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000200005

Gross morphology of the brain of Pseudopimelodus bufonius (Valenciennes, 1840) (Siluriformes: Pseudopimelodidae)
Provedor de dados: 83
Autores: Abrahão,Vitor Pimenta; Shibatta,Oscar Akio.
The gross morphology of the brain of the pseudopimelodid Pseudopimelodus bufonius is described and compared with congeners. Observations were made on removed brains after elimination of bones from the top of the skull and severing of the cranial nerves and the spinal cord. Nine morphometric characters associated with the major subdivisions of the brain were identified, seven of which revealed significant differences among the species examined. The corpus cerebelli in all examined species of the genus is the largest structure of the brain. The behavior of the species of Pseudopimelodus is still unknown, but in other teleosts that condition is typically correlated with a higher degree of motor coordination. Relative size proportions of the tectum opticum,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Behavior; Catfishes; Comparative Morphology; Neotropical fishes; Neuroanatomy.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000200255

A new species of Microglanis (Siluriformes: Pseudopimelodidae) from upper rio Paraná basin, Brazil
Provedor de dados: 83
Autores: Shibatta,Oscar Akio; Benine,Ricardo Cardoso.
Microglanis garavelloi, new species, collected in tributaries of rio Paranapanema and rio Tietê, is the first species of the genus described from upper rio Paraná basin. The new species can be distinguished from other species of Microglanis on morphometric characters, color pattern, caudal-fin shape, pectoral-spine morphology and lateral line development. Characters used specifically to distinguish M. garavelloi from M. cottoides (laguna dos Patos and rio Uruguay basins) and M. parahybae (rio Paraíba do Sul basin) include morphometrics, color pattern and pectoral-spine serration.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bumble bee catfish; Freshwater fishes; Neotropical; Rio Paranapanema; Rio Tietê.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000400015

A new species of the genus Pimelodus La Cépède, 1803 from the rio Iguaçu basin and a reappraisal of Pimelodus ortmanni Haseman, 1911 from the rio Paraná system, Brazil (Ostariophysi: Siluriformes: Pimelodidae)
Provedor de dados: 83
Autores: Garavello,Julio Cesar; Shibatta,Oscar Akio.
A new species, Pimelodus britskii, is described from the rio Iguaçu in the rio Paraná drainage, on the border of Paraná and Santa Catarina states, Brazil. Specimens of this species were wrongly included in the type series of Pimelodus ortmanni. Pimelodus britskii is distinguished from its congeners by color pattern, having circular dark brown blotches usually smaller than one orbital diameter, regularly and scattered along the trunk. Differs from P. ortmanni by the following characters: body depth at posterior cleithral process greater than head length; lips not prominent; and maxillary barbel reaching or surpassing vertical drawn through median of adipose fin. Pimelodus britskii represents the second species of the genus Pimelodus from the rio Iguaçu basin.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Freshwater fishes Southern Brazil Taxonomy; Rio Iguaçu Pimelodus britskii.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000300008

DNA barcoding confirms the occurrence of Rhamdia branneri and Rhamdia voulezi (Siluriformes: Heptapteridae) in the Iguaçu River Basin
Provedor de dados: 83
Autores: Ribolli,Josiane; Scaranto,Bianca Maria; Shibatta,Oscar Akio; Bombardelli,Robie Allan; Zaniboni-Filho,Evoy.
ABSTRACT DNA barcoding is a widely utilized molecular-based identification of species and taxonomic resolutions. Until recently, Rhamdia voulezi and Rhamdia branneri were considered species synonyms of Rhamdia quelen; however, morphological and cytogenetic analyses have suggested the validity of distinct species. Due to the absence of molecular taxonomy of R. voulezi and R. branneri, the objective of this study was to test its validity through traditional DNA barcoding and the GMYC (General Mixed Yule Coalescent) COI-based analyses in 19 specimens from the Iguaçu River Basin. In both methodologies, three MOTUs (Molecular Operational Taxonomic Units) were identified based on the estimated optimum threshold (OT = 0.77). The average inter-MOTU distance (NJ,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aquaculture; COI; Jundiá; MOTU; Species complex.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000100217

Reappraisal of Rhamdia branneri Haseman, 1911 and R. voulezi Haseman, 1911 (Siluriformes: Heptapteridae) from the rio Iguaçu with notes on their morphometry and karyotype
Provedor de dados: 83
Autores: Garavello,Julio Cesar; Shibatta,Oscar Akio.
ABSTRACT The species Rhamdia branneri Haseman, 1911 and the subspecies Rhamdia branneri voulezi Haseman, 1911 from rio Iguaçu are currently recognized as synonyms of Rhamdia quelen (Quoy &amp; Gaimard, 1824). However, recent karyotype and ecomorphology studies distinguish R. branneri and R. voulezi as different species. Examination of Rhamdia populations from rio Iguaçu, including type specimens, together with other congeners from rio Tibagi, allowed to properly reexamine the situation of these Haseman's taxa and references given to Rhamdia in the Iguaçu. The species R. branneri and R. voulezi have strong serrae with large basis on both margins of the pectoral-fin spine, uncommon in the remaining species of Rhamdia and different from the fine serrate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Endemism; Ostariophysi; Revision; Taxonomy.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000100211

Two new species of Microglanis (Siluriformes: Pseudopimelodidae) from the upper-middle rio Araguaia basin, Central Brazil
Provedor de dados: 83
Autores: Ruiz,William Benedito Gotto; Shibatta,Oscar Akio.
Two new species of Microglanis are described from tributaries of upper-middle rio Araguaia, States of Mato Grosso and Goiás, Brazil. Microglanis oliveirai differs from its congeners by the short supraoccipital process not reaching the small anterior nuchal plate, and reduced number of gill rakers, lateral line pores, ribs, vertebrae, and caudal-fin rays. Microglanis xylographicus differs from its congeners by the presence of melanophores surrounding the neuromasts of the superficial lines, snout length 11.4-12.9% SL and body color pattern consisting of horizontal brown stripes similar to a wooden bark pattern. An identification key of Microglanis species from the Amazon basin is presented.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ecology; Neotropical; Rio Tocantins; Taxonomy.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000400002

A new species of Microglanis(Siluriformes: Pseudopimelodidae) from the upper rio Tocantins basin, Goiás State, Central Brazil
Provedor de dados: 83
Autores: Shibatta,Oscar Akio.
A new species of Microglanis is described from the upper rio Tocantins basin, Barro Alto, Goiás State, Brazil. This species is distinguished from the others by presenting a unique color pattern, consisting of round spots in the flank between the larger dark brown blotches. Moreover, it can be distinguished by the combination of the following features: caudal fin emarginate, the upper lobe slightly larger than the lower, lateral line relatively long, reaching vertical through posterior margin of the pelvic fin, and light stripe on supra-occipital region absent or very narrow and with irregular shape.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bumble-bee catfish; Multivariate morphometrics; Neotropical; Systematics.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000100081

Description of a new species of Microglanis (Siluriformes: Pseudopimelodidae) from the Amazon basin, Amazonas State, Brazil
Provedor de dados: 83
Autores: Jarduli,Lucas Ribeiro; Shibatta,Oscar Akio.
The first species of Microglanis from the rio Amazonas, Amazonas State, Brazil is described. This species differs from all congeners by the forked caudal fin, and color pattern of the supraoccipital region consisting of two elliptical and juxtaposed pale spots, besides a combination of morphometrics characters.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bumble-bee catfish; Multivariate morphometrics; Systematics.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000300507

Cryptic species of the genus Pimelodella (Siluriformes: Heptapteridae) from the Miranda River, Paraguay River basin, Pantanal of Mato Grosso do Sul, Central Brazil
Provedor de dados: 83
Autores: Souza-Shibatta,Lenice; Pezenti,Larissa Forim; Ferreira,Dhiego Gomes; Almeida,Fernanda Simões de; Sofia,Silvia Helena; Shibatta,Oscar Akio.
Specimens of Pimelodellacaptured in the Miranda River, Pantanal of Mato Grosso do Sul State, present morphological features that could indicate at least four species. Therefore, karyotype analysis and molecular biology provided evidence that they were only two species, one showing 2n = 46, and the other, 2n = 52 chromosomes, with only 18% genetic similarity. The morphological analysis evidenced that the dorsal filament is a male characteristic and that the upper lobe of the caudal fin was variable and might or might not be elongated in both species. With respect to morphometric characters, the formation of two groups was evident, but with a small overlap of specimens between them. Among the species with filaments on the dorsal fin observed in the Pantanal,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cytotaxonomy; Cytogenetics; Multivariate morphometrics; RAPD.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000100101

A new genus of Neotropical rheophilic catfishes, with four new species (Teleostei: Siluriformes: Pseudopimelodidae)
Provedor de dados: 83
Autores: Shibatta,Oscar Akio; Vari,Richard P.
ABSTRACT Rhyacoglanis, a new genus of the South American freshwater catfish family Pseudopimelodidae is described from cis-Andean portions of the continent. Rhyacoglanis is distinguished from other genera of the family by three synapomorphies: presence of a light blotch on the cheek; a connection between the middle of the dark caudal-fin stripe and the dark caudal-peduncle pigmentation; and 30-35 total vertebrae. Species of Rhyacoglanis are rheophilic and strongly associated with rapids and other swift-flowing waters. A phylogenetic analysis based on 41 morphological characters yields a hypothesis of monophyly of the Pseudopimelodidae and Rhyacoglanis. Pimelodus pulcher Boulenger, 1887, from the western Amazon basin is designated as type-species of the new...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiversity; Identification key; Phylogeny; Systematics; Taxonomy.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000200208

A new species of bumblebee catfish of the genus Microglanis (Siluriformes: Pseudopimelodidae) from the upper rio Paraguay basin, Brazil
Provedor de dados: 83
Autores: Shibatta,Oscar Akio.
ABSTRACT A new species of Microglanis from upper rio Paraguay basin is described. The species differs from congeners by the following combination of characters: deeply forked caudal fin with pointed lobes, bifurcated hook between antrorse and retrorse hooks on anterior margin of pectoral-fin spine, lateral line relatively long, surpassing the vertical through end of dorsal fin but not reaching adipose fin, color pattern of dorsal region of head dark brown with a restrict thin light area between anterior nostril and eye, broad light stripe on supraoccipital region.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Microglanis carlae; Microglanis cottoides; Multivariate morphometrics; Pantanal; Systematics.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000300213

A new subterranean species of Phreatobius Goeldi, 1905 (Siluriformes, Incertae sedis) from the Southwestern Amazon basin
Provedor de dados: 84
Autores: Shibatta,Oscar Akio; Muriel-Cunha,Janice; Pinna,Mário C.C. de.
A new species of the previously monotypic catfish genus Phreatobius is described from an artificial well in the village of Rio Pardo, located 90 km south of the city of Porto Velho, State of Rondônia, Brazil, in the drainage area of the Rio Branco (Rio Madeira system, Amazon basin). Phreatobius dracunculus n. sp. differs from its only congener, P. cisternarum, by the absence of eyes (vs. present), the lack of dark integumentary pigmentation (vs. faint dark pigment always present), the presence of five pectoral-fin rays (vs. four), ventral procurrent rays 11-13 (vs. 22 to 26), dorsal procurrent rays 29-31 (vs. 42 to 50), fewer vertebrae (52 or 53 vs. 59 to 64) and the larger pseudotympanus. The new species shows all diagnostic characters so far proposed for...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Blind catfish; Subterranean fishes; Madeira basin; Habitat; Taxonomy.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492007001700001

Gross brain morphology of Rhamdia quelen (Quoy &amp;amp; Gaimard 1824) (Ostariophysi: Siluriformes: Heptapteridae)
Provedor de dados: 84
Autores: Abrahão,Vitor Pimenta; Pupo,Fábio Müller dos Reis de Salles; Shibatta,Oscar Akio.
Abstract The brain gross morphology of Rhamdia quelen is described and compared with seven species of six genera of Heptapteridae. Interspecific variation in shape, size, and position of brain subdivisions was observed in all examined species. The posterior position of the hypophysis on the hypothalamus and presence of a lateral subdivision on the lobus facialis are shared by all examined heptapterids. Rhamdia quelen and Pimelodella gracilis, currently considered closely related within the family Heptapteridae, exhibit the anterior and posterior area of the telencephalon with equivalent widths, and the lateral line lobe reaching the anterior area of the lobus vagi. Members of the so called Nemuroglanis sub-clade (Cetopsorhamdia iheringi, Heptapterus...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Central nervous system; Anatomy; Catfish; Neotropical region.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492018000100240

Crescimento de Schizodon Intermedius Garavello &amp;amp; Britski (Ostheichthyes, Anostomidae) do Rio Tibagi (Sertanópolis, Paraná)
Provedor de dados: 104
Autores: Orsi,Mário Luís; Shibatta,Oscar Akio.
This work consists of age, growth, and circuli formation period determination and the relation of reproduction, temperature, and pluviosity on the growth of S. intermedius Garavello &amp;amp; Britski, 1990. The growth curve was adjusted by the Bertalanfy's expression and the relationship between weight and size was made by the minimum square method to determine the conditioning factor. Gonadossomatic index (IGS) was used to study the reproduction. The assintotic values for length were 33,94 cm and 44,81 cm for males and females, respectively. The circulus were formed annually and the growth was slow and the maximum age was determined to be nine years. The formation of the circuli was influenced by the reproduction, probably allied to other abiotic factors...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Schizodon intermedius; Age; Growth; Tibagi river.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000300009

Plasticidade alimentar em Rivulus pictus Costa (Osteichthtyes, Cyprinodontiformes, Rivulidae) de uma pequena lagoa em Brasília, Distrito Federal, Brasil
Provedor de dados: 104
Autores: Shibatta,Oscar Akio; Bennemann,Sirlei Terezinha.
Rivulus pictus has a wide distribution in Distrito Federal and lives in different environments, including small lakes. The analysis of gastric and intestinal contents showed that most of the 21 ingested food items were from autochthonous origin and characterized the diet of an omnivorous fish with a trend to planktivory. Five feeding items were important in the composition of the alimentary spectrum and revealed that food resources are explored near water surface (Acari), in the water column (Copepoda, Cladocera and Closterium sp.) and also in the bottom (Chironomidae). The varied diet and the capacity to explore all levels of the environment evidenced that feeding flexibility is one of the factors that facilitates the survival of this species in different...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diet; Feeding spectrum; Ecology.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752003000400009

Alimentação em machos e fêmeas do pirá-brasília, Simpsonichthys boitonei Carvalho (Cyprinodontiformes, Rivulidae)
Provedor de dados: 104
Autores: Shibatta,Oscar Akio; Rocha,Antônio José Andrade.
Simpsonichthys boitonei Carvalho, 1959 has an evident sexual dimorphism, easily observed in the color pattern and body proportions. In order to know the differences in the diet between males and females, the stomach contents of 28 individuals was examined. The Sorensen's index of similarity showed 90.9% of food items in common between sex. The main food in this species is Cladocera as evidenced in terms of average number, abundance and frequency of occurrence. The presence of vegetable is evidence of a high flexibility of this species in relation to the feeding behavior. Maybe the differences in the social behavior between sex are important in the total amount of ingested food.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Simpsonichthys boitonei; Diet; Anual fish; Distrito Federal; Brasil.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000200007

Atividade alimentar de espécies de peixe do rio Tibagi, relacionada com o desenvolvimento de gordura e das gônadas
Provedor de dados: 104
Autores: Bennemann,Sirlei Terezinha; Orsi,Mário Luís; Shibatta,Oscar Akio.
The fish assemblage in a stretch of Tibagi river was studied during the period of one year, throught monthly sampling. It was observed that four fish species (Schizodon intermedius Garavello &amp;amp; Britski, 1990, Acestrorhynchus lacustris Reinhardt, 1874, Pimelodus maculatus Lacépède, 1803 and Steindachnerina insculpta Fernandez-Yepez, 1948) were very frequent and they represent all the main trophic groups. In order to characterize feeding activity, fat storage and reproduction the means degree of repletion, fat and maturation, obtained for each species in each month were compared among the four fish species. Steindachnerina insculpta, a detritivovous species was the one with the highest feeding activity while A. lacustris, a piscivorous fish, showed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fish; Feeding activity; Gonadal development; Tibagi river; Paraná.
Ano: 1996
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751996000200018

Diversidade da ictiofauna do Alto Rio Paraná: composição atual e perspectivas futuras
Provedor de dados: 49
Autores: Langeani,Francisco; Castro,Ricardo Macedo Corrêa e; Oyakawa,Osvaldo Takeshi; Shibatta,Oscar Akio; Pavanelli,Carla Simone; Casatti,Lilian.
É apresentada uma síntese sobre os peixes do Alto Paraná, com base em dados de coleções, dados de literatura e novas coletas. Trezentas e dez espécies, de 11 ordens e 38 famílias, são referidas para a drenagem, aumentando significativamente números anteriores. Dentre as espécies da área, 236 (76,1%) são autóctones, 67 (21,6%) alóctones e sete (2,3%) exóticas. As principais causas de ocorrência de espécies não nativas (alóctones e exóticas) foram a dispersão a partir do baixo Paraná, após a construção do Reservatório de Itaipu e o escape de pisciculturas. A maior parte das espécies referidas (65%) tem porte pequeno, sendo menor que 21 cm de comprimento; dentre essas, a maioria ocorre apenas em riachos e cabeceiras. Apesar da ictiofauna do Alto Paraná ser...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Peixes; Água doce; Sudeste brasileiro; Inventário; Transposição.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032007000300020

Peixes como indicadores da qualidade ambiental do ribeirão Esperança, município de Londrina, Paraná, Brasil
Provedor de dados: 49
Autores: Vieira,Daniel Bartolomei; Shibatta,Oscar Akio.
Com o objetivo de se avaliar a qualidade do ambiente e os padrões de diversidade das espécies de peixes de um riacho urbano alterado, foram feitas avaliações da qualidade de hábitats, análises da velocidade da água e levantamento da distribuição das espécies de peixes. Para abranger uma quantidade maior de ambientes, cinco trechos ao longo do ribeirão foram escolhidos para quatro coletas sazonais da ictiofauna, em função de suas diferentes características físicas e influência da ação humana. Um total de 5.426 espécimes, de 12 espécies e 6 ordens, foi coletado. Através da análise da diversidade de hábitats e da velocidade da água, foi possível determinar qual a situação de alteração ambiental de cada trecho de coleta. Os trechos intermediários apresentaram...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Diversidade de hábitats; Diversidade de peixes; Qualidade da água; Região urbana; Riachos.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032007000100008

Ictiofauna dos trechos alto e médio da bacia do rio Tibagi, Paraná, Brasil
Provedor de dados: 49
Autores: Shibatta,Oscar Akio; Gealh,Ana Maria; Bennemann,Sirlei Terezinha.
A ictiofauna de quatro trechos da bacia hidrográfica do rio Tibagi foi amostrada mensalmente de maio de 2001 a abril de 2002, com redes de espera (totalizando 1.000 m²) para analisar a dominância, constância e similaridade. Um total de 68 espécies (32 Characiformes, 32 Siluriformes, 2 Gymnotiformes e 2 Perciformes) e 2.758 exemplares foram capturados. O trecho com maior riqueza de espécies foi Tibagi abaixo (50 espécies), seguido por Tibagi acima (40 espécies), Iapó (35) e Fortaleza (14). No Fortaleza ocorreu o menor número de espécies, mas foi verificada a maior abundância, com 508 dos 877 exemplares capturados pertencentes à espécie Astyanax paranae, o que elevou o índice de dominância desse local para 37,9%. As dez espécies mais abundantes...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Conservação; Alto rio Paraná; Ictiofauna; Rios; Bacia do rio Tibagi.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032007000200014