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A new species of Parotocinclus with reduced adipose fin (Loricariidae: Hypoptopomatinae), from the rio Jacuípe basin, Bahia State, Brazil Neotropical Ichthyology
Silva-Junior,Dario Ernesto da; Ramos,Telton Pedro Anselmo; Zanata,Angela Maria.
ABSTRACT A new species of Parotocinclus, apparently endemic to the rio Jacuípe basin, Bahia State, Brazil, is described. The new species is distinguished from congeners, except P. bidentatus, P. cabessadecuia, P. dani, P. halbothi, P. muriaensis, P. pentakelis, P. seridoensis, and P. spilurus, by the presence of a reduced adipose fin. The new species differs from the aforementioned species by the absence of unicuspid accessory teeth, abdomen with broad naked areas between lateral and medial patches of plates, and snout tip completely covered by plates and odontodes. The adipose fin of the new species is restrict solely to the adipose-fin spine, lacking the adipose-fin membrane, a reduction pattern previously described to P. halbothi, a congener from rivers...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cascudinho; Catfishes; Northeastern Mata Atlântica freshwater ecoregion; Siluriformes; Taxonomy.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000200207
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A new species of the catfish Neoplecostomus (Loricariidae: Neoplecostominae) from a coastal drainage in southeastern Brazil Neotropical Ichthyology
Cherobim,Arieli Matheus; Lazzarotto,Henrique; Langeani,Francisco.
ABSTRACT A new species of loricariid catfish is described from the rio Perequê-Açú and surrounding basins, Parati, Rio de Janeiro State. The new species has the accessory process of ceratobranchial 1 more slender than the main body of the ceratobranchial, and a very large sesamoid ossification, markedly greater in size than the interhyal. Additionally, the new species presents a distinct dorsal color pattern consisting of a conspicuous horseshoe shaped light blotch with a central dark area posterior to the supraoccipital.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cascudos; Neoplecostomus microps; Perequê-Açú; Siluriformes; Taxonomy.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000400204
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A new spiny species of Hypostomus Lacépède (Loricariidae: Hypostominae) from thermal waters, upper rio Paraná basin, central Brazil Neotropical Ichthyology
Martins,Fernanda O.; Langeani,Francisco; Zawadzki,Cláudio H..
A new species of Hypostomus is described from the rio Quente, rio Paranaíba drainage, in the upper rio Paraná basin in central Brazil. The rio Quente is a peculiar small and shallow fast water stream with water temperatures around 34ºC. The new species is distinguished from all congeners by having the five lateral series of plates with hypertrophied odontodes not aligned in rows and more conspicuous on flanks of caudal peduncle of the larger specimens. The new species is only known from the rio Quente.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Freshwater fishes; Neotropical region; Rio Quente; Siluriformes; Taxonomy.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000400729
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Alimentação e ciclo alimentar diário de Hoplosternum littorale (Hancock) (Siluriformes, Callichthyidae) nas lagoas Guaraná e Patos da planície do alto rio Paraná, Brasil Zoologia
Hahn,Norma Segatti; Almeida,Vera Lúcia Lescano de; Luz,Karla Danielle Gaspar da.
Hoplosternum Uttorale (Hancock, 1828) is an abundant species in the lagoons of the upper Paraná river floodplain. This species was sampled in Patos and Guaraná lagoons in the flood period (November/92-May/93) and low water period (June-October/93). To analyse food contents in the diet were analysed stomach of 91 adults. Twenty seven food items were recorded, among them, Testaceae, Nematoda, microcrustaceans, quironomids and organic detritus were predominant. These items allows to characterize the species as bentivore. To study feeding activity were analized 565 adults stomach contents. Food intake was more intense during flooding. Considering diel variation, the species started to eat during dusk, increasing during night, stopping to eat during daytime.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Siluriformes; Callichthyidae; Hoplosternum Uttorale; Feeding; Diel cycle; Lagoons.
Ano: 1997 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000100005
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Biologia reprodutiva dos bagres marinhos Genidens genidens (Valenciennes) e Cathorops spixii (Agassiz) (Siluriformes, Ariidae), na Baía de Sepetiba, Rio de Janeiro, Brasil Zoologia
Gomes,Iracema David; Araújo,Francisco Gerson; Azevêdo,Marcia Cristina Costa de; Pessanha,André Luiz Machado.
The reproductive cycle of the marine catfishes Genidens genidens Valenciennes, 1833 and Cathorops spixii Agassiz, 1839 in the Sepetiba Bay, was assessed by an annual period of sampling from October 1993 to September 1994. The fishes were caught by standardized otter trawl and environmental parameters of temperature, salinity and transparency of water were recorded at each sampling. Five gonadal phases were described, based in macroscopic observations. Changes in the gonadosomatic index (GSI) and in the percentual of stages of gonadal development showed that G. genidens spawns in Summer/early Autumn, coinciding with low salinity and high temperature and transparency. Cathorops spixii spawns in late Spring/early Summer, coinciding with rising temperature and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Siluriformes; Ariidae; Reproduction; Marine Catfish; Sepetiba Bay.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000600017
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Biology and population features of a rare species of Pseudopimelodidae from the Upper Paraná River Basin Biota Neotropica
Esguícero,André Luiz Henríques; Arcifa,Marlene Sofia.
Streams contain an expressive fraction of the South American fish diversity, mostly composed of small-sized, endemic, and rare species. Populational, reproductive, and diet aspects of Microglanis garavelloi were studied, aiming to make a wide characterization of this species of bumblebee catfish. This is an endemic species of the Upper Paraná River Basin, and the only representative of the genus in the watershed. It is a littoral-dweller of small rivers, with asymptotic length of 34.1 mm and a population mostly composed of individuals with 20-30 mm of standard length. This species presents high fecundity and mortality rate, and low longevity and growth rate. It is a total spawner, October to February being the spawning period, and probably has brood care...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Siluriformes; Conservation; Population structure; Reproductive dynamics; Diet.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000300018
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Catfishes as prey items of Potamotrygonid stingrays in the Solimões and Negro rivers, Brazilian Amazon Biota Neotropica
Shibuya,Akemi; Zuanon,Jansen.
In spite of the fact that catfish have rarely been reported as food items in the diets of freshwater stingrays, they are commonly observed in the stomach contents of species inhabiting the Solimões and Negro rivers in the Brazilian Amazon. The stomach contents of six rays from the Solimões River and 64 from the Negro River were analyzed, and catfishes (distributed among the families Callichthyidae, Cetopsidae, Doradidae and Loricariidae) were found in the stomach contents of four and 10 of these rays, respectively, comprising a frequency of occurrence of 20%. These data indicate a relevant participation of catfishes in the diets of potamotrygonid rays in the Amazon, and may reflect the regional diversity and abundance of Siluriformes in the region.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Diet; Feeding; Freshwater stingrays; Myliobatiformes; Siluriformes.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032013000100041
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Complete mitochondrial genome from South American catfish Pseudoplatystoma reticulatum (Eigenmann & Eigenmann) and its impact in Siluriformes phylogenetic tree. Repositório Alice
VILLELA, L. C. V.; ALVES, A. L.; VARELA, E. S.; YAMAGISHI, M. E. B.; GIACHETTO, P. F.; SILVA, N. M. A. da; PONZETTO, J. M.; PAIVA, S. R.; CAETANO, A. R..
The cachara (Pseudoplatystoma reticulatum) is a Neotropical freshwater catfish from family Pimelodidae (Siluriformes) native to Brazil. The species is of relative economic importance for local aquaculture production and basic biological information is under development to help boost efforts to domesticate and raise the species in commercial systems. The complete cachara mitochondrial genome was obtained by assembling Illumina RNA-seq data from pooled samples. The full mitogenome was found to be 16,576 bp in length, showing the same basic structure, order, and genetic organization observed in other Pimelodidae, with 13 protein-coding genes, 2 rNA genes, 22 trNAs, and a control region. Observed base composition was 24.63% T, 28.47% C, 31.45% A, and 15.44% G....
Tipo: Separatas Palavras-chave: Cachara; Peixe-gato; Mitogenome.; Filogenia; Melhoramento genético animal; Peixe de água doce; RNA; Aquicultura.; Pseudoplatystoma reticulatum; Mitochondrial genome; Siluriformes; Phylogeny; Catfish; Single nucleotide polymorphism.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1074198
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Composição da ictiofauna em função da fisiografia de um riacho costeiro de Floresta Atlântica - Brasil Biota Neotropica
Guimarães,Ana Tereza Bittencourt; Menezes,Márcia Santos de; Peret,Alberto Carvalho.
Os riachos costeiros apresentam grande diversidade de peixes, apesar dos impactos a que são submetidos. O conhecimento da estrutura e da composição da ictiofauna constitui importante esforço para levantamento de parâmetros de avaliação que possam proporcionar atitudes para a conservação destes ambientes. A composição da ictiofauna relacionada a características fisiográficas de riachos costeiros do sul do Brasil constitui-se uma contribuição para a interpretação da dinâmica destes ecossistemas. Foram realizadas coletas de peixes em cinco pontos amostrais do Rio do Pinto, localizado no município de Morretes, Paraná, Brasil. As coletas foram realizadas entre os meses de maio de 2006 a novembro de 2007, utilizando a técnica de pesca elétrica, com um esforço...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Siluriformes; Characiformes; Substratos; Distribuição longitudinal.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000200006
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Cordelia's Dilemma, Historical Bias, and General Evolutionary Trends: Catfishes as a Case Study for General Discussions on Phylogeny and Macroevolution International Journal of Morphology
Diogo,Rui.
As noted Gould in his recent and last book «The structure of evolutionary theory», discourses on the high importance and frequency of evolutionary trends have consumed a great part of the research on the history of clades. Although aware that natural selection theoretically yields adaptation to immediate environments, many authors defend such trends as generalised improvements somehow conferring advantages across most or all experienced environments. The high importance given to evolutionary trends is questioned by Gould, who considers that such a high importance given to such evolutionary trends bears no necessary relationship to the relative frequency or casual weight of these events in evolution, but mainly to a major bias: trends tell histories, and...
Tipo: Journal article Palavras-chave: Evolution; Morphology; Phylogeny; Siluriformes; Teleostei.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022006000500016
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Cytogenetic analyses of two endemic fish species from the São Francisco River basin: Conorhynchus conirostris and Lophiosilurus alexandri (Siluriformes) Genet. Mol. Biol.
Marques,Marilza Barbosa de Almeida; Moreira-Filho,Orlando; Garcia,Caroline; Margarido,Vladimir Pavan.
Two Siluriformes species endemic to the São Francisco River basin were characterized by conventional and differential cytogenetic analyses involving C-banding, Ag-nucleolar organizer region (NOR) and chromomycin A3 (CMA3) staining, and FISH (fluorescent in situ hybridization) with 18S and 5S rDNA probes. Conorhynchus conirostris presents a higher diploid number (2n = 60) than those detected in Pimelodidae representatives, whereas Lophiosilurus alexandri, with a karyotype of 2n = 54 chromosomes, presents a chromosomal constitution similar to that found in the family Pseudopimelodidae. Plesiomorphic characteristics such as single NORs at terminal positions are found in both species, as revealed by CMA3 and silver nitrate staining, and FISH with a 18S rDNA...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Incertae sedis; Pimelodidae; Pseudopimelodidae; RDNA; Siluriformes.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200008
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Cytogenetic studies in fishes of the genera Hassar, Platydoras and Opsodoras (Doradidae, Siluriformes) from Jarí and Xingú Rivers, Brazil Genet. Mol. Biol.
Milhomem,Susana Suely Rodrigues; Souza,Augusto Cesar Paes de; Nascimento,Aline Lira do; Carvalho Jr.,Jaime Ribeiro; Feldberg,Eliana; Pieczarka,Julio Cesar; Nagamachi,Cleusa Yoshiko.
We studied the karyotypes of Hassar cf. orestis and an undescribed Hassar species from the Jarí River and Opsodoras ternetzi, H. orestis and Platydoras cf. costatus from the Xingú River, all with 2n = 58. Constitutive heterochromatin is located in the centromere in most metacentric pairs; in some chromosomes this banding is not present, or it is located on the whole chromosome arm or in the distal regions. The NOR is located on a single biarmed pair at a distal region of the short arm in H. cf. orestis, H. orestis and P. cf. costatus at a distal region of the long arm in O. ternetzi and at a proximal region of the long arm in the Hassar species. In all species (except for Hassar sp.) the CMA3 analysis revealed a rich G-C region coincident with the NOR....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chromosomes; Amazon; Biodiversity; Siluriformes; Banding; Fluorochromes.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572008000200017
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Descripción de una nueva especie de bagre marino fósil (Teleostei, Siluriformes, Ariidae) del Mioceno de la provincia de Río Negro, Argentina Pap. Avulsos de Zool. (São Paulo)
Bogan,Sergio; Agnolin,Federico L..
En este trabajo se describen dos cráneos de la familia Ariidae procedentes del miembro Saladar de la Formación Gran Bajo del Gualicho, ubicados en las Salinas del Gualicho, provincia de Río Negro, Argentina. La edad de los depósitos del Miembro Saladar se remonta al Mioceno Temprano alto/Mioceno Medio bajo. Los materiales son asignados a una nueva especie extinta del género viviente Genidens. Este nuevo taxón se distingue de todas las especies actuales por presentar un proceso supraoccipital muy corto, ancho y redondeado, extraescapular subcircular y mesetmoides amplios con una conspicua escotadura mesial, frontales prácticamente planos en vista lateral y margen lateral de los huesos esfenóticos rectilíneo. Genidens sp. nov., representa el registro más...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Siluriformes; Ariidae; Genidens; Formación Gran Bajo del Gualicho; Patagonia.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492011002500001
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Desempenho e coeficiente intestinal de alevinos puros e híbridos de pintados em condicionamento alimentar R. Bras. Zootec.
Barbosa,Osvaldo Nunes; Raizer,Josué; Gonda,Mario Fabiano; Silva,Jesiel Mamedes.
Avaliou-se neste estudo o desempenho de alevinos de pintado puros Pseudoplatystoma corruscans e híbridos em treinamento alimentar. O coeficiente intestinal (CI = comprimento do intestino/comprimento total do animal) foi relacionado à massa e ao volume e comparado por meio de análise de variância multivariada e de componentes principais. Conforme a rotina da estação de piscicultura, a duração do condicionamento alimentar é de aproximadamente 60 dias, quando os animais são condicionados a alimentação com ração seca extrusada durante a fase clara do dia. Foram coletados cerca de 100 animais por grupo nas etapas inicial, intermediária e final. No início, os animais receberam coração bovino triturado e gradativamente foi adicionada ração moída até a aceitação...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Adaptação intestinal; Condicionamento alimentar; Crescimento; Peixes carnívoros; Peixes neotropicais; Siluriformes.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001200001
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Dimorfismo sexual em Siluriformes e Gymnotiformes (Ostariophysi) da Amazônia Acta Amazonica
Py-Daniel,Lúcia H. Rapp; Fernandes,Cristina Cox.
No presente trabalho é feito um levantamento dos casos de dimorfismo sexual em Siluriformes e Gymnotiformes. Este levantamento se restringe às formas Neotropicais, com ênfase mais especificamente, às da Amazônia. Peixes dessa região possuem uma grande diversidade, ainda que os limites intraespecíficos não estejam bem definidos. Embora preliminar, o mapeamento de características dimórficas em um cladograma referente a família Loricariidae (Siluriformes) auxilia na demonstração de que padrões de dimorfismo sexual são consistentes com hipóteses de monofiletismo. Em Apteronotidae (Gymnotiformes), com base no mapeamento dos caracteres tamanho e forma do focinho e presença de dentes diferenciada em árvores filogenéticas, podemos inferir que esses caracteres...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dimorfismo sexual; Siluriformes; Gymnotiformes; Evolução; Bagre; Peixes elétrico.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672005000100015
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Distribuição e abundância relativa de bagres marinhos (Siluriformes, Ariidae) na Baía de Sepetiba, Rio de Janeiro Zoologia
Azevedo,Márcia Cristina Costa de; Araújo,Francisco Gerson; Cruz Filho,Antônio Gomes da; Santos,Alexandre Clístenes de Alcântara.
Marine catfish (Ariidae) are abundant resources in otter trawl fisheries carried out at Sepetiba Bay, Rio de Janeiro (Lat. 22º54, 23º04'S; Long. 43º34\ 44º10'W). Relative abundance and distribution were assessed, based in 158 fishing sampling at seven sites in the Bay, between July-1993 e June-1996. Five species were recorded in the following abundance rank order: Genidens genidens (Valenciennes, 1839), Caihorops spixii (Agassiz,1829), Sciadeichthys lunisculis (Valenciennes, 1840), Nelunia barba (Lacépède, 1803), and Bagre marinus (Mitchill, 1814), the latter have been caught in only two samples. Marine catfish showed higher abundance in the inner Bay, with indication of spatial segregation. G genidens was abundant in ali sites of lhe inner Bay, C. spixii...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Siluriformes; Ariidae; Fish ecology; Marine catfish; Sepetiba Bay.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751998000400003
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Estimation of jundiá (Rhamdia quelen) dietary amino acid requirements based on muscle amino acid composition Scientia Agricola
Meyer,Gustavo; Fracalossi,Débora Machado.
Jundiá, Rhamdia quelen (Quoy & Gaimard, 1824), is a catfish native to Central and South America. The species has a number of excellent farming features, such as easy handling, low temperature resistance, efficient feed conversion, flavorsome meat and absence of intramuscular bones, and has been increasingly raised in Southern Brazil. However, most of its nutritional requirements have not yet been determined, including the essential amino acid (EAA) requirements. The objective of the present study was to estimate such requirements through the determination of muscle tissue amino acid composition for four groups of jundiá. Two groups were wild caught and allocated in two categories: from 1 to 100 g and from 101 to 200 g. The other two groups,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nutrition; Catfish; Siluriformes; Growth; Weigth gain.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162005000400015
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ESTUDIO COMPARATIVO DE OVARIOS Y CUBIERTAS OVOCITARIAS EN PECES SILURIFORMES DE AGUAS CONTINENTALES DE CHILE Gayana
Huaquín,Laura G.; Veliz,Dina; Arratia,Gloria.
El conocimiento de la estructura ovárica permite analizar la capacidad desovante, duración, temporalidad y forma en que se realiza esta función reproductiva. Se describen y analizan aspectos estructurales de las cubiertas ovocitarias de 2 especies de Siluriformes Nematogenys inermis especie considerada en peligro de extinción y de Trichomycterus areolatus, la más abundante y de mayor distribución en Chile continental. Cortes histológicos de 6 mm de ovarios fijados en Bouin fueron teñidos con HE, Azán, Van Gieson, Alcian Blue y PAS. El estudio histológico muestra la pared del ovario formada por el peritoneo externo, una túnica media y el epitelio ovárico. Desde la túnica se proyectan hacia el interior, láminas de tejido conectivo que van a constituir el...
Tipo: Journal article Palavras-chave: Histología; Cubiertas ovocitos; Siluriformes.
Ano: 2002 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382002000200026
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Fallen leaves on the water-bed: diurnal camouflage of three night active fish species in an Amazonian streamlet Neotropical Ichthyology
Sazima,Ivan; Carvalho,Lucélia Nobre; Mendonça,Fernando Pereira; Zuanon,Jansen.
Resemblance to dead leaves is a well known type of camouflage recorded for several small vertebrates that dwell in the leaf and root litter on the ground. We present here instances of such resemblance in three species of nocturnal fishes (Siluriformes and Gymnotiformes) that spend the daytime among submersed root-tangle with leaf litter in Amazonian streams. All three species are very difficult to spot visually, due both to their shape and colors which blend with the substrate, as well as to the heterogeneous nature of their cover. Two species were recorded to lie on their sides, which adds to their resemblance to dead leaves. When disturbed, one species may drift like a waterlogged leaf, whereas another moves upwards the root-tangle, exposing its fore...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crypsis; Leaf resemblance; Defence against predators; Siluriformes; Gymnotiformes.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252006000100013
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Fecundidade e tipo de desova do tamuatá, Hoplosternum littorale Hancock (Osteichthyes, Siluriformes) no Rio Curiaú, Macapá, Amapá Zoologia
Sá-Oliveira,Júlio César; Chellappa,Sathyabama.
During June 1999 to June 2000 one hundred and forty seven females of Hoplosternum littorale Hancock, 1828 were collected from the Curiaú River, Macapá, Amapá, Brazil. The objective of this study was to determine the fecundity and the type of spawning of H. littorale. Analysis of the percentage distribution of the oocyte diameter softh e females, in five different stages of gonadal development, showed that this species is a total spawner. There were two different size graups of oocytes with synchranic development. The total fecundity varied from 9, 144 to 31, 698 mature oocytes.The fecundity, when related to total length and weight, showed that it increases with the enhance in total length and weight.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Osteichthyes; Siluriformes; Hoplosternum littorale; Fecundity; Typeof spawning.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000400009
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