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	Provedor de dados Neotropical Ichthyology (27) Biota Neotropica (4) Rev. Bras. Zool. (2) Acta Amazonica (2) Autor Zuanon,Jansen (35) Carvalho,Lucélia Nobre (6) Ferreira,Efrem (4) Sazima,Ivan (4) Shibuya,Akemi (4) Tanaka,Sho (3) Amadio,Sidinéia (2) Arruda,Rafael (2) Ito,Priscila Madoka M. (2) Akama,Alberto (1) Anjos,Maeda B. dos (1) Anjos,Maeda Batista dos (1) Araujo-Lima,Carlos (1) Araújo,Maria Lúcia G. de (1) Barros,Bruno S. (1) Bastos,Douglas A. (1) Beltran-Pedreros,Sandra (1) Beltrão,Hélio (1) Bertaco,Vinicius A. (1) Birindelli,José L. O. (1) Mais... Palavra-chave Taxonomy (6) Amazon (3) Amazon basin (3) Diet (3) Amazônia (2) Camouflage (2) Crypsis (2) Feeding behavior (2) Fish diversity (2) Forest streams (2) Ostariophysi (2) Phylogeny (2) Siluriformes (2) Actinopterygii (1) Alimentação (1) Altitudinal fishes (1) Amazon fishes (1) Ancistrini (1) Anthropogenic disturbance (1) Aquarium trade (1) Mais... Tipo do documento Info:eu-repo/semantics/article (33) Info:eu-repo/semantics/report (2) Ano 2020 (1) 2019 (1) 2017 (3) 2015 (1) 2014 (1) 2013 (4) 2012 (3) 2011 (4) 2010 (4) 2009 (1) 2007 (3) 2006 (4) 2005 (2) 2004 (2) 2003 (1) Mais... País Brazil (35) Idioma Inglês (32) Português (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 35 Primeira ... 1 2 ... Última Following food clouds: feeding association between a minute loricariid and a characidiin species in an Atlantic Forest stream, Southeastern Brazil Neotropical Ichthyology Leitão,Rafael P.; Caramaschi,Érica P.; Zuanon,Jansen. Following behavior is a widespread feeding tactic among marine fishes, but remains poorly documented for freshwater fishes. The present study describes such association between two freshwater species: the minute armored catfish Parotocinclus maculicauda and the South American darter Characidium sp. During underwater observations in an Atlantic Forest stream, we recorded Characidium sp. closely following P. maculicauda (<5cm), catching the particles dislodged by this catfish's grazing activity. The following behavior displayed by the darter is considered opportunistic and possibly favors the capture of preys associated to the periphyton. This study is one of the few records of nuclear-follower feeding association between freshwater fishes and the first... Tipo: Info:eu-repo/semantics/article Palavras-chave: Following behavior; Foraging habits; Freshwater; Hypoptopomatinae; Crenuchidae. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000300011 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 Sampling effort and fish species richness in small terra firme forest streams of central Amazonia, Brazil Neotropical Ichthyology Anjos,Maeda Batista dos; Zuanon,Jansen. Small streams are important components of the landscape in terra firme forests in central Amazonia and harbor a large number of fish species. Nevertheless, the lack of a common sampling protocol in studies of this ichthyofauna hinders comparisons among available results. This study evaluates how the length of stream reach sampled affects estimates of local fish species density in 1st, 2nd, and 3rd order streams, and proposes a mean minimum sampling length that best approximates the absolute number of species in a given stream segment. We sampled three streams in the Biological Dynamics of Forest Fragments Project's study sites, between May and August 2004. At each stream, one 1st order, one 2nd order, and one 3rd order segment was sampled. We sampled five... Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish diversity; Fish abundance; Stream size; Species composition; Species accumulation curves. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252007000100006 Centromochlus meridionalis, a new catfish species from the southern Amazonian limits, Mato Grosso State, Brazil (Siluriformes: Auchenipteridae) Neotropical Ichthyology Sarmento-Soares,Luisa Maria; Cabeceira,Fernando G.; Carvalho,Lucélia Nobre; Zuanon,Jansen; Akama,Alberto. Centromochlus actually comprises eleven species, being the most problematic genus among the Centromochlinae, including morphologically heterogeneous taxa. The Centromochlus species have a wide distributional area on northern South America. Centromochlus meridionalis, new species, is described from headwaters of rio Teles Pires, contributor of rio Tapajós, Mato Grosso State, Brazil, and represents one of the southernmost records of a centromochlin catfish for Meridional Amazon rivers. Centromochlus meridionalis is promptly distinguished from its congeners by the small orbital diameter (relative to head length), and also by the combination of absence of first nuchal plate, anterior margin of dorsal-fin spine smooth, six branched rays in anal fin, seven pairs... Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon; Centromochlinae; Forest streams; Taxonomy; Teles Pires. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000400797 Does soil color affect fish evolution? Differences in color change rate between lineages of the sailfin tetra Neotropical Ichthyology Pinto,Kalebe S.; Pires,Tiago H. S.; Stefanelli-Silva,Gabriel; Barros,Bruno S.; Borghezan,Elio A.; Zuanon,Jansen. ABSTRACT Several organisms match their skin color to the prevalent background color, granting crypsis against predators. The rate at which body color changes occur varies among organisms as a result of physiological constraints and adaptation to variation in contrasts between objects and the environmental background. Faster darkening of body color is favored in environments that show higher amounts of contrast between common objects and the prevailing background. Soil types in Amazon forest streams (igarapés) create distinct environments with respect to the amount of contrast, a result of the amount of sand and clay, which offers different contrasts against dead leaves. Here, we investigated differences in the rates of color change among populations of the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Background matching; Body color; Crenuchus spilurus; Crypsis; Phenotypic plasticity. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000200204 Two new ornamental loricariid catfishes of Baryancistrus from rio Xingu drainage (Siluriformes: Hypostominae) Neotropical Ichthyology Py-Daniel,Lúcia Rapp; Zuanon,Jansen; Oliveira,Renildo Ribeiro de. Two new species of the hypostomine genus Baryancistrus are described from the rio Xingu drainage. Baryancistrus xanthellus is distinguished from all other Baryancistrus species by the presence of yellow spots along the entire body and conspicuous yellow marks on distal tip of dorsal and caudal fins. Baryancistrus chrysolomus is distinguished from its congeners by its uniform dark body coloration and presence of yellow bands on dorsal and caudal fins. Despite the lack of formal description, these species are very popular in the international aquarium trade. We expect that these formal descriptions might contribute to the improvement of Brazilian regulations in the international trade of ornamental loricariids. Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon fishes; Aquarium trade; Belo Monte; Taxonomy. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252011000200001 Color changing and behavioral context in the Amazonian Dwarf Cichlid Apistogramma hippolytae (Perciformes) Neotropical Ichthyology Rodrigues,Raoni Rosa; Carvalho,Lucélia Nobre; Zuanon,Jansen; Del-Claro,Kleber. Animal coloration has many functions, and fishes are noted among vertebrates for presenting a wide variety of color patterns. Although in marine fishes the relationship between body coloration and behavioral context is well documented, there's not much information about freshwater fishes. Here we describe color patterns displayed by the dwarf cichlid Apistogramma hippolytae and suggest that these patterns are dependent on different social and behavioral settings. Field observations were conducted underwater in a pond in Central Amazonia, Brazil. We recorded six body coloration patterns related to seven different kinds of behavioral activities: foraging, resting, reproductive and agonistic displays, aggression (attacking and fleeing) and parental care.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Intraspecific communication; Interspecific communication; Color changes; Parental care; Cichlidae. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252009000400013 The use of pelvic fins for benthic locomotion during foraging behavior in Potamotrygon motoro (Chondrichthyes: Potamotrygonidae) Rev. Bras. Zool. Shibuya,Akemi; Carvalho,Marcelo R. de; Zuanon,Jansen; Tanaka,Sho. Synchronized bipedal movements of the pelvic fins provide propulsion (punting) during displacement on the substrate in batoids with benthic locomotion. In skates (Rajidae) this mechanism is mainly generated by the crural cartilages. Although lacking these anatomical structures, some stingray species show modifications of their pelvic fins to aid in benthic locomotion. This study describes the use of the pelvic fins for locomotory performance and body re-orientation in the freshwater stingray Potamotrygon motoro (Müller & Henle, 1841) during foraging. Pelvic fin movements of juvenile individuals of P. motoro were recorded in ventral view by a high-speed camera at 250-500 fields/s-1. Potamotrygon motoro presented synchronous, alternating and unilateral... Tipo: Info:eu-repo/semantics/article Palavras-chave: Behavior; Elasmobranchii; Locomotor adaptation; Potamotrygonid stingrays; Swimming. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000300179 Feeding habits of giant otters Pteronura brasiliensis (Carnivora: Mustelidae) in the Balbina hydroelectric reservoir, Central Brazilian Amazon Rev. Bras. Zool. Cabral,Márcia M. M.; Zuanon,Jansen; de Mattos,Gália E.; Rosas,Fernando C. W.. This study aimed to identify the diet of giant otters, Pteronura brasiliensis (Zimmermann, 1780) in the Balbina reservoir (01º55'S, 59º29'W), to compare it with literature data on the diet of giant otters from non-dammed areas, and to verify the effects of the seasonal changes in water levels on the feeding habits of Balbina otters. A total of 254 feces samples were collected and identified according to the lowest possible taxonomic level. Teleostei fish were present in 100% of the samples; two samples also presented monkey fur (n = 1) and sloth fur (n = 1), suggesting that the diet of P. brasiliensis, in the reservoir, is almost exclusively based on fish. Ten fish families were identified in our samples, six of which were exclusive to the Balbina Lake... Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon basin; Aquatic mammal; Conservation; Dam; Diet. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000100008 Comparação da eficiência de dois métodos de coleta de peixes em igarapés de terra firme da Amazônia Central Acta Amazonica Ribeiro,Odirlene Marinho; Zuanon,Jansen. Em estudos sobre distribuição espacial, alimentação e estrutura de comunidades de espécies de peixes de pequeno porte em igarapés, são aplicados alguns métodos de coleta específicos para esses ambientes. Este trabalho teve como objetivo principal comparar dois métodos de coleta, um ativo (puçá e peneira) e outro passivo (armadilhas). A coleta com puçá foi mais eficiente, tanto em número de espécies registradas, quanto em número de indivíduos capturados. Houve uma taxa de escape aparentemente elevada nas armadilhas, assim como a predação de parte dos peixes capturados por jejus (Erythrinus erythrinus) dentro das armadilhas, o que pode ter contribuído para a menor eficiência desse método. A baixa similaridade entre os pares de amostras coletadas com os dois... Tipo: Info:eu-repo/semantics/article Palavras-chave: Ictiofauna; Riqueza de espécies; Riachos; Armadilha; Puçá. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672006000300017 O efeito da floresta alagada na alimentação de três espécies de peixes onívoros em lagos de várzea da Amazônia Central, Brasil Acta Amazonica Claro-Jr,Luiz; Ferreira,Efrem; Zuanon,Jansen; Araujo-Lima,Carlos. As enchentes anuais dos rios na Amazônia alagam extensas áreas de floresta conhecidas como várzeas ou igapós. Estas áreas têm papel importante na vida dos peixes da região, pois são fontes de alimento e de abrigo. Acreditamos que o desmatamento destas áreas ocasiona prejuízos à ictiofauna principalmente pela diminuição da quantidade e diversidade de alimento disponível. O estudo da relação entre a quantidade de floresta e a dieta de Parauchenipterus galeatus (Auchenipteridae, Siluriformes), Mylossoma duriventre (Characidae, Characiformes)e Triportheus elongatus (Characidae, Characiformes)permitiu registrar pela primeira vez a influência direta da floresta alagada na ecologia alimentar de peixes na Amazônia Central. Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazônia; Peixes; Alimentação; Floresta alagada; Lagos; Desmatamento. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672004000100018 Diet of two syntopic species of Crenuchidae (Ostariophysi: Characiformes) in an Amazonian rocky stream Biota Neotropica Fernandes,Suzanne; Leitão,Rafael Pereira; Dary,Eurizângela Pereira; Guerreiro,Ana Isabel Camacho; Zuanon,Jansen; Bührnheim,Cristina Motta. Abstract This study assessed the diet of two poorly known syntopic fish species of the family Crenuchidae, Characidium aff. declivirostre and Leptocharacidium omospilus, in a Presidente Figueiredo´ rocky stream, Amazonas, Brazil. The stomach contents were analyzed and their Frequency of Occurrence (FO %) and Relative Volume (Vol %) were combined in a Feeding Index (IAi). We examined 20 individuals of C. aff. declivirostre and 23 of L. omospilus. The Morisita-Horn Index was used to estimate the overlap between the diets of these species. Immature insects were the most valuable items consumed by both fish species. The diet of C. aff. declivirostre was mainly composed of larvae and pupae of Chironomidae, while L. omospilus predominantly consumed larvae of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Stream fish; Co-existence; Feeding overlap. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032017000100206 A ictiofauna do Parque Estadual do Cantão, Estado do Tocantins, Brasil Biota Neotropica Ferreira,Efrem; Zuanon,Jansen; Santos,Geraldo dos; Amadio,Sidinéia. O Parque Estadual do Cantão é uma área protegida no rio Araguaia. Em um inventário realizado durante um ciclo hidrológico completo, foram capturadas 271 espécies de peixes, pertencentes a 183 gêneros, 41 famílias e 12 ordens. Characidae foi a família mais diversa com 89 espécies (32,6% do total), seguida por Loricariidae com 23 espécies (8,4%) e Cichlidae com 21 espécies (7,7%), dez famílias foram representadas por uma única espécie. Os resultados mostraram que o PE Cantão é uma área com alta diversidade de espécies de peixes, e que as assembleias ainda estão bem preservadas, de modo que a existência e manutenção deste Parque é de alto interesse para a preservação da fauna de peixes do rio Araguaia. Tipo: Info:eu-repo/semantics/article Palavras-chave: Biodiversidade; Amazônia; Unidade de conservação; Pesca; CPUE. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000200028 Free meals on long-distance cruisers: the vampire fish rides giant catfishes in the Amazon Biota Neotropica Zuanon,Jansen; Sazima,Ivan. The trichomycterid catfishes known as candirus are renowned for their blood feeding, but information on their habits under natural conditions is very fragmentary and generally restricted to hosts or habitats. We recorded an undescribed species of the vandelliine genus Paracanthopoma riding the giant jau catfish, Zungaro zungaro (Pimelodidae), in the upper Amazon. The candirus were found on the host's caudal and pectoral fins, as well as the base of the dorsal fin, with their snouts buried up to the eyes in the tough skin of the catfish host. All of them had small amounts of partly digested blood in the distal part of the gut. Along the host's dorsal fin base we found a few additional tiny holes, most of them healed. We suggest that Paracanthopoma feeds on... Tipo: Info:eu-repo/semantics/article Palavras-chave: Trichomycteridae; Paracanthopoma sp.; Candiru; Blood-feeding; Phoresis; Dispersal; Pimelodidade; Zungaro zungaro; Amazon. Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032005000100012 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 Registros recuperados: 35 Primeira ... 1 2 ... Última

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