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Registros recuperados: 37
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A ictiofauna da bacia do Rio Paraíba do Sul. Biodiversidade e padrões biogeográficos BABT
Bizerril,Carlos Roberto S. Fontenelle.
Fish fauna taxonomic composition and biogeographic informations of the Paraíba do Sul river basin are presented. Samples were taken in 75 units between January/1995 and June/1998. Species were identified and classified according its distributional pattern. Biogeographic analyses were conduced using macro, meso and micro scales. A total of 167 species were sampled, being 37 marine species. Among the marine taxa, Awaous tajasica and Oosthetus lineatus seems to spend their whole life histories in the freshwater environments. Sixteen species were introduced in the basin. Most of the native taxa inhabit the rivers’storage zone, mainly in pools. Faunistic similarities between the Paraíba do Sul river basin and other Brazilian rivers suggest that the environment...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodiversity; Paraíba do Sul river basin; Freshwater fishes; Southeastern Brazil.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000200014
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A new species of Acestridium Haseman, 1911 (Loricariidae: Hypoptopomatinae) from the Eastern Amazon basin, Brazil Neotropical Ichthyology
Rodriguez,Mónica S.; Reis,Roberto E..
Acestridium triplax, new species, is described from the Amazon River basin in Pará State, Brazil. The new species can be distinguished from all its congeners by having one series of middle abdominal plates between the lateral abdominal plates (vs no abdominal plates between the lateral abdominal plates).
Tipo: Info:eu-repo/semantics/article Palavras-chave: Freshwater fishes; Neotropical; Taxonomy.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000400001
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A new species of Microglanis (Siluriformes: Pseudopimelodidae) from upper rio Paraná basin, Brazil Neotropical Ichthyology
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
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A new species of Tetragonopterus (Characiformes: Characidae) from Central Amazon lowlands, Brazil Neotropical Ichthyology
Urbanski,Bruna Q.; Melo,Bruno F.; Silva,Gabriel S. C.; Benine,Ricardo C..
ABSTRACT A new species of Tetragonopterus is described from lowland rivers of Central Amazon. It differs from congeners by having a vertically-oriented patch of dark pigmentation limited to posterior portion of the caudal peduncle and by bearing five thin and sharp teeth on dentary, along with other morphometric and meristic features. We hypothesize that the new taxon belongs to the herein named “Tetragonopterus anostomus clade” that includes T. anostomus, T. denticulatus, T. kuluene, and T. juruena.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodiversity; Freshwater fishes; South America; Taxonomy; Tetragonopterinae.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000200205
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A new species of Trichomycterus (Siluriformes: Trichomycteridae) from lagoa Feia drainage, southeastern Brazil Neotropical Ichthyology
Lima,Sergio M. Q.; Lazzarotto,Henrique; Costa,Wilson J. E. M..
Trichomycterus caipora, new species, is described from rio Macabu basin, lagoa Feia drainage, serra de Macaé, southeastern Brazil. The new species is distinguished from its congeners from southern and southeastern Brazil by the combination of: the presence of nine pectoral-fin rays, caudal fin emarginated and high number of opercular and interorpecular odontodes. Ecological notes are presented and putative phylogenetic relationships and characters shared with congeners are discussed.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Catfishes; Trichomycterus caipora; Freshwater fishes; Atlantic Forest; Rio de Janeiro State; Rio Macabu basin.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000300004
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A new species of whiptail armored catfish, genus Pseudohemiodon (Siluriformes: Loricariidae) from the Orinoco River basin, Llanos region of Colombia and Venezuela Neotropical Ichthyology
Rojas-Molina,Yecid Andrey; Provenzano-Rizzi,Francisco; Ramírez-Gil,Hernando.
ABSTRACT A new species of whiptail armored catfish belonging to the genus Pseudohemiodon is described. The new species inhabits aquatic systems of the Orinoco River basin, mostly in the Llanos region of Colombia and Venezuela. Previously, it had identified as P. laticeps erroneously. The genus Pseudohemiodon includes seven known species inhabit Amazon and Paraná-Paraguay-Uruguay rivers basins. The new species is distinguished from congeners by the combination of the following characters: abdomen totally covered; area in front of gill opening without plates, ventrally; dorsal body color pattern without transversal dark bands, mostly in the caudal peduncle; head with straight sides; head and caudal peduncle narrower.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Diversity; Freshwater fishes; South America; Systematic; Taxonomy.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000200213
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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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A small new species of Crenicichla Heckel, 1840 from middle rio Xingu, Brazil (Teleostei: Cichlidae) Neotropical Ichthyology
Ito,Priscila Madoka M.; Py-Daniel,Lúcia H. Rapp.
A new species of Crenicichla is described from the middle rio Xingu and tributaries, upstream from Volta Grande do Xingu. The largest specimen measured 47.8 mm SL. The new speciescan be distinguished from all other Crenicichla species by the combination of the following character states: presence of serrae on supracleithrum (diagnostic of Crenicichla wallacii species group), large caudal blotch centrally located on caudal lateral line (shared with C. urosema and C. virgatula ), vertical dark stripes on the caudal fin and up to three series of teeth on premaxilla and maxilla (vs. more than four series of teeth). The new species described hereinis the eleventh species of Crenicichla listed from the rio Xingu basin. Similarities of color pattern among small...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon basin; Freshwater fishes; Morphology; Rio Bacajá; Taxonomy.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252015000300471
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A taxonomic review of the species of CharaxScopoli, 1777 (Teleostei: Characidae: Characinae) with description of a new species from the rio Negro bearing superficial neuromasts on body scales, Amazon basin, Brazil Neotropical Ichthyology
Menezes,Naércio A.; Lucena,Carlos Alberto S. de.
The species of Charaxwere reviewed by Lucena (1987) who a little later (1989) added three new species to the genus. Examination of recently collected specimens from museum collections documented the more extensive geographic distribution for most species and revealed the existence of a new species in which superficial neuromasts were discovered and are herein described. These skin structures were also detected in C. metae Eigenmann, 1922. Anal- and pelvic-fin hooks previously observed only on the anal-fin of one species of the genus are described herein in some other species. Charax unimaculatus Lucena is considered a junior synonym of C. michaeli Lucena. All the species are redescribed and the new species described.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Freshwater fishes; Neotropical; Ostariophysi; Systematics.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000200193
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An integrated approach clarifies the cryptic diversity in Hypostomus Lacépède 1803 from the Lower La Plata Basin Anais da ABC (AABC)
CARDOSO,YAMILA P.; BRANCOLINI,FLORENCIA; PROTOGINO,LUCILA; PARACAMPO,ARIEL; BOGAN,SERGIO; POSADAS,PAULA; MONTOYA-BURGOS,JUAN I..
Abstract Abstract: Hypostomus commersoni Valenciennes 1836, Hypostomus cordovae (Günther 1880) and Hypostomus laplatae (Eigenmann 1907) have been little studied since their original descriptions. This study shows a comprehensive review of these species from the Lower La Plata Basin, including their taxonomic history, distribution, color patterns, morphology, and ecological and molecular phylogenetic data. Morphological and phylogenetic analyses based on D-loop sequences suggested that H. commersoni can be separated into two subclades, or subgroups. Based on these results and on the non-overlapping distribution range of the two subclades, we conclude that they represent two distinct species, thereby revalidating H. spiniger. The results also suggest that H....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Argentina; Brazil; Freshwater fishes; Molecular phylogenetics; Paraná Basin.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000300604
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Cestodes in South American freshwater teleost fishes: keys to genera and brief description of species Zoologia
Rego,Amilcar Arandas; Chubb,James C; Pavanelli,Gilberto C.
Keys to genera of cestodes in South American freshwater teleost fishes are provided, with diagnoses of genera and short descriptions of species. Two new genera are proposed, Chambriella gen.n. for Goezeella agostinhoi Pavanelli & Santos, 1992 and G paranaensis Pavanelli & Rego, 1989, and Brooksiella gen.n. for Amphoteromorphus praeputialis Rego, Santos & Silva, 1974. Nomimoscolex magna Rego, Santos & Silva, 1974, previously species inquirenda, is transferred to the genus Proteocephalus Weinland, 1858. Goezeella nupeliensis Pavanelli & Rego, 1989 is considered a species inquirenda. Species and host lists are included.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cestoda; Proteocephalidea; Freshwater fishes; Parasitology.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751999000200003
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Charax goeldii Fowler, 1913 a valid species of Galeocharax Fowler (Characiformes: Characidae) Neotropical Ichthyology
Menezes,Naércio A..
Charax goeldii Fowler is resurrected from synonymy of Galeocharax gulo and redescribed. Its inclusion in Galeocharax is justified, and comments on the distribution of the species of this genus are made. The record of Galeocharax gulo in the rio São Francisco is considered a mistake.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Freshwater fishes; South America; Brazil; Rio Madeira; Taxonomy.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000100002
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Continental ichthyofauna from the Paraíba do Norte River basin pre-transposition of the São Francisco River, Northeastern Brazil Biota Neotropica
Ramos,Telton Pedro Anselmo; Lima,Jéssica Alcoforado de Sena; Costa,Silvia Yasmin Lustosa; Silva,Márcio Joaquim da; Avellar,Raizze da Costa; Oliveira-Silva,Leonardo.
Abstract: Freshwater ichthyofauna from Brazil Northeast region was considered as being poorly known until recent years, with a considerable number of publications becoming available in the last decade. The present study provides an inventory of freshwater fish species from the Paraíba do Norte River basin located in Paraíba State, Brazil. This inventory is intended to contribute to the of knowledge to the regional fish diversity, pre-transposition of the São Francisco River. Collecting data was obtained from ichthyological databases of both national and foreign institutions. A total of 47 freshwater fish species are registered within the Paraíba do Norte River basin, represented by 38 genera, 20 families and six orders. Characiformes, comprising 47% (22...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Freshwater fishes; Neotropical Region; Diversity; Identification key.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000400207
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Cytogenetic and molecular markers reveal the complexity of the genus Piabina Reinhardt, 1867 (Characiformes: Characidae) Neotropical Ichthyology
Pazian,Marlon Felix; Pereira,Luiz Henrique Garcia; Shimabukuru-Dias,Cristiane Kioko; Oliveira,Claudio; Foresti,Fausto.
Cytogenetic and molecular analyses were carried out in fish representative of the genus Piabina. This study specifically involved the species P. argentea and P. anhembi collected from areas of the Paranapanema and Tietê River basins, Brazil. Our findings suggest that fish classified as Piabina argentea in the Paranapanema and Tietê Rivers may represent more than one species. The samples analyzed differed by cytogenetic particularities and molecular analyses using partial sequences of the genes COI and CytB as genetic markers revealed three distinct groups of P. argentea with genetic distances sufficient to support the conclusion that the three samples analyzed are three distinct taxonomic units.
Tipo: Info:eu-repo/semantics/article Palavras-chave: DNA Barcoding; Freshwater fishes; Fish; MtDNA; 18S rDNA; 5S rDNA.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000200008
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Description of a new species of Parancistrus (Siluriformes: Loricariidae) from the rio Xingu, Brazil Neotropical Ichthyology
Rapp Py-Daniel,Lúcia H.; Zuanon,Jansen.
Parancistrus nudiventris, new species, is described and compared with the congener P. aurantiacus. The new species has only been recorded from rio Xingu and can be distinguished from P. aurantiacus by having a naked abdomen (plated in P. aurantiacus), the presence of bluish dots in living specimens or spotted in preserved specimens (uniformly dark or clear brown or mottled, never spotted in P. aurantiacus), larger interbranchial distance (39-56% in HL vs. 24.9-39.5% in P. aurantiacus), narrower interorbital distance (26.8-38% in HL vs. 38.5-43.1% in P. aurantiacus). Parancistrus nudiventris also has buccal teeth more conspicuous than in P. aurantiacus. Main skeletal differences include the presence of a strong condyle on the lateral ethmoid for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Parancistrus nudiventris; Freshwater fishes; Amazon basin; Natural History; Neotropical catfishes.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000400014
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Diet of Hemigrammus marginatus (Characiformes: Characidae) in the Upper Contas River, Diamantina Plateau (Bahia, Brazil) Iheringia, Sér. Zool.
Barreto,Silvia B.; Silva,André T.; Souza,Fabiane B.; Jucá-Chagas,Ricardo.
ABSTRACT Studies on the composition of fish diet and on how species exploit food resources are especially relevant in tropical freshwater systems, where dietary plasticity is a commonly used strategy. In this study, we analysed the food spectrum and the environmental, seasonal and ontogenetic variations in the diet of a characid species [Hemigrammus marginatus Ellis, 1911 (Characidae)] in the region of the Upper Contas River, in the Diamantina Plateau, Brazil. We verified an omnivorous/invertivorous and opportunistic food habit, with predominance of insects and microcrustaceans, followed by filamentous algae. Seasonality did not alter the food resources used by the species. However, differences were detected in the dominant categories when comparing the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Feeding; Coastal drainage; Trophic ecology; Freshwater fishes.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212018000100236
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Different feeding habits influence the activity of digestive enzymes in freshwater fish Ciência Rural
Gioda,Carolina Rosa; Pretto,Alexandra; Freitas,Carine de Souza; Leitemperger,Jossiele; Loro,Vania Lucia; Lazzari,Rafael; Lissner,Leandro Ademar; Baldisserotto,Bernardo; Salbego,Joseânia.
ABSTRACT: The aim of this study was to verify the activity of some digestive enzymes in four fish species with different feeding habits. Knowledge of these enzymatic activities can help us to understand the species' digestive processes. The species chosen for this study were Ctenopharyngodon idella (herbivore), Rhamdia quelen (omnivore), Leporinus obtusidens (omnivore) and Hoplias malabaricus (carnivore). The digestive tract of these species was divided into four portions to estimate enzymatic activity: stomach, anterior, mid and posterior intestine. Ctenopharyngodon idella had the highest amylase and maltase activities in all portions of the gut, followed by L. obtusidens . The highest trypsin activity was observed in all gut portions of H. malabaricus,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Freshwater fishes; Feeding habits; Enzymatic activity; Amylase; Alkaline protease; Maltase; Trypsin.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000300406
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Ecomorphological relationships among four Characiformes fish species in a tropical reservoir in South-eastern Brazil Rev. Bras. Zool.
Silva-Camacho,Débora de S.; Santos,Joaquim N. de S.; Gomes,Rafaela de S.; Araújo,Francisco G..
The aim of this study was to assess the ecomorphological patterns and diet of four Characiformes fish species in a poorly physically structured tropical reservoir. We tested the hypothesis that body shape and diet are associated, because environmental pressure acts on the phenotype, selecting traits according to the available resources. Ten ecomorphological attributes of 45 individuals of each species - Astyanax cf. bimaculatus (Linnaeus, 1758), Astyanax parahybae Eigenmann, 1908, Oligosarcus hepsetus (Cuvier, 1829), and Metynnis maculatus (Kner, 1858) - , collected between February and November 2003, were analyzed, and the patterns were assessed using Principal Components Analysis (PCA). Diet similarity among fish species was assessed using cluster...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Body shape; Diet; Freshwater fishes; Morphological diversity; Niche overlap.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702014000100004
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Effect of abiotic variables on fish eggs and larvae distribution in headwaters of Cuiabá River, Mato Grosso State, Brazil Neotropical Ichthyology
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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Enzymatic Activity in the Gastrointestinal Tract of Pimelodus maculatus (Teleostei, Siluriformes) in Two Neotropical Reservoirs with Different Trophic Conditions BABT
Duarte,Silvana; Bemquerer,Marcelo; Araújo,Francisco Gerson.
Enzymatic activities for digestion of proteins and carbohydrates were compared among three organs of the digestive system of Pimelodus maculatus in two reservoirs with different trophic conditions during the winter of 2006. The aim was to test the hypothesis that enzymatic activity for the digestion of proteins and carbohydrates differed among organs and that such activities differ between the trophic state of the environment. Enzymatic activities were determined through the assays of specificity for trypsin, chymotrypsin and β-glucosidase enzymes. The intestine had higher trypsin-like enzymatic activities compared to the stomach and liver. The highest β-glucosidase activity was found in the liver compared to the stomach and intestine in the oligotrophic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Enzymes; Catfish; Physiology; Freshwater fishes; Digestive tract.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000400605
Registros recuperados: 37
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