Artículos de revistas: "Taxonomia de peixes"

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Buckup, Paulo Andreas. "TAXONOMIA E FILOGENIA DE PEIXES DE RIACHOS BRASILEIROS". Oecologia Australis 25, n.º 02 (16 de junio de 2021): 197–230. http://dx.doi.org/10.4257/oeco.2021.2502.01.

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The fish fauna occurring in Brazilian small streams comprises 36 families of teleost freshwater fishes. The systematics and phylogenetic knowledge about this fauna greatly expanded during the last two decades, but is still very heterogeneous. For some taxonomic groups there are taxonomic identification keys and well-documented phylogenetic hypotheses, while other groups are mostly comprised by poorly known species. The increase in the knowledge of Neotropical fish diversity was associated with the significant growth of hypotheses about their evolution and contributed to the understanding of the phylogenetic history of fish comunities and their structure in small streams.

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Nascimento, Glória Cristina Cornélio do, Eduardo Beltrão de Lucena Córdula, Reinaldo Farias Paiva de Lucena, Ricardo de Souza Rosa y José da Silva Mourão Lucena. "Pescadores e "currais": um enfoque etnoecológico". Gaia Scientia 10, n.º 4 (2016): 117–37. http://dx.doi.org/10.21707/gs.v10.n04a09.

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Os "currais" de pesca são armadilhas fixas com moirões, varões e varas estrategicamente implantados no solo junto aos recifes. O objetivo do presente estudo foi analisar os aspectos etnoecológicos dos pescadores de "currais" em Cabedelo, litoral da Paraíba. A pesquisa foi desenvolvida com pescadores (n=7) através de excursões quinzenais, de acordo com a variação das marés nos cinco meses de sua despesca (Novembro, 2012 a Março de 2013) totalizando 21 coletas. Pescadores de diferentes modalidades de pesca também foram entrevistados (n=20) com objetivo de confirmar memes locais. Os métodos adotados foram a técnica "bola de neve" ("snow ball"), observação direta, com entrevistas informais e formulários semiestruturados além da utilização do índice de constância, do valor de uso, econômico e taxonomia folk. Na composição da ictiofauna foram registradas 25 espécies de peixes, distribuídas em 15 famílias. A distribuição espacial dos peixes pode ser demonstrada conforme os estratos verticais na coluna d'água e ecozonas. A melhor maré para a despesca, segundo os pescadores, foram a maré vazante, seguida da maré "morta" ou de lançamento. Os pescadores consideram os ventos Leste, Norte e Nordeste como os melhores para a pesca. O estudo demonstrou como o conhecimento local dos pescadores de "currais", corrobora com o conhecimento científico em seus aspectos etnoecológicos, demonstrando precisão e importância para medidas de conservação de espécies, ecossistemas e cultura local.

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Burger, Rafael, Angela Maria Zanata y Priscila Camelier. "Estudo taxonômico da ictiofauna de água doce da bacia do Recôncavo Sul, Bahia, Brasil". Biota Neotropica 11, n.º 4 (diciembre de 2011): 273–90. http://dx.doi.org/10.1590/s1676-06032011000400024.

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A bacia do Recôncavo Sul faz parte das drenagens costeiras do Leste do Brasil, está quase inteiramente incluída na região do Baixo Sul do Estado da Bahia, é limitada ao norte e noroeste pela bacia do rio Paraguaçu e ao sul e sudoeste pelo rio de Contas. No presente estudo, um total de 41 espécies de peixes estritamente de água doce foi registrado, pertencentes a 28 gêneros, 12 famílias e seis ordens (18 Characiformes, 13 Siluriformes, cinco Perciformes, duas Cyprinodontiformes, duas Gymnotiformes e uma Synbranchiformes). Foram encontradas dez espécies possivelmente ainda não descritas, quatro espécies endêmicas e quatro introduzidas na área de estudo. Uma espécie presente na área está ameaçada de extinção. Uma chave de identificação para as espécies conhecidas para o Recôncavo Sul é apresentada, assim como comentários sobre a taxonomia e distribuição de algumas espécies. Devido à diversidade comparativamente alta e condições ambientais relativamente preservadas, a bacia do rio das Almas é indicada como uma área chave para conservação.

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Trajano, Eleonora y Heraldo A. Britski. "Pimelodella kronei (Ribeiro, 1907) e seu sinônimo Caecorhamdella brasiliensis Borodin, 1927: morfologia externa, taxonomia, e evolução (Teleostomi, Siluriformes)". Boletim de Zoologia 12, n.º 12 (21 de noviembre de 1998): 53. http://dx.doi.org/10.11606/issn.2526-3358.bolzoo.1988.122378.

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Pimelodella kronei (= Typhlobagrus kronei, Ribeiro, 1907) é um bagre com regressão de olhos e pigmentação, encontrado em cavernas do Alto Ribeira, município de Iporanga, SP, e considerado derivado do pimelodídeo epígeo P. transitória. Com o objetivo de se estudar as relações entre esses táxons, foram examinados 28 caracteres morfométricos e merísticos usualmente utilizados em estudos de taxonomia de peixes, além dos olhos e pigmentação, de amostras de P. kronei provenientes da caverna Areias (provável localidade-tipo) e Ressurgência das Bombas, e de P. transitória. Não foram encontradas diferenças que permitam uma separação segura das três populações mas apenas algumas tendências relacionadas à especialização à vida cavernícola em P. kronei; espinho dorsal mais curto, distancia inter-orbital maior, barbilhões mais frequentemente quebrados nesta última. Foi também examinado o holôtipo de Caecorhamdella brasi1íensis Borodin, 1927, descrita a partir de três exemplares provenientes da "Província de São Paulo". Verificou-se superposição com relação aos caracteres de P. kronei, pelo que consideramos C. brasiliensis um sinônimo desta. A alta variabilidade nos caracteres relacionados à vida subterrânea sugere que P. kronei é um cavernícola recente. Possivelmente uma ou mais populações de P. transitória ficaram isoladas em cavernas durante os períodos glaciais, secos, do Pleistoceno, dando origem, independentemente ou através de colonização única com posterior dispersão subterrânea, a populações cavernícolas especializadas (P. kronei lato sensu).

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Montag, Luciano Fogaça de Assis, Adna Almeida de Albuquerque, Tiago Magalhães da Silva Freitas y Ronaldo Borges Barthem. "Ictiofauna de campos alagados da Ilha do Marajó, Estado do Pará, Brasil". Biota Neotropica 9, n.º 3 (septiembre de 2009): 241–53. http://dx.doi.org/10.1590/s1676-06032009000300024.

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Os campos alagados ou savanas da ilha do Marajó é uma área disjunta do bioma Cerrado na Amazônia, e é considerada de grande importância para planos de manejo, conservação e preservação ambiental. A fim de ampliar o conhecimento ictiofaunístico da região, o presente estudo reuniu informações coletadas em campo, compiladas da literatura e selecionadas de coleções ictiológicas sobre a fauna de peixes da eco-região savana do Marajó. As coletas de campo ocorreram entre os anos de 2003 e 2005, e apresentaram como métodos a rede de mão, rede de arrasto, rede de tapagem e captura manual por técnica de mergulho, sendo que durante esse período foram amostrados os municípios de Ponta de Pedras, Chaves e Muaná. Além desses, outros quatro municípios também foram abordadas em estudos pretéritos. A eficiência desse inventário biológico foi avaliada pelos métodos de acumulação de espécies (rarefação) e pela estimativa de riqueza Bootstrap. Nestes três locais foram coligidas 146 espécies, sendo que destas, 89 espécies (60%) e oito famílias da classe Actinopterygii foram registradas como novas ocorrências para os campos do Marajó. Com o incremento das coletas nos três municípios, o total de espécies para os campos da ilha é de 254 espécies. Desse total, 44 espécies (17%) são alvos da pesca comercial para fins de alimentação e 46 espécies (18%) são capturadas na pesca ornamental. Sendo assim, inventários biológicos realizados em locais de grande importância ambiental como ou campos alagados da Ilha do Marajó são imprescindíveis, pois sem esta documentação, qualquer avaliação de biodiversidade, delimitação de áreas de endemismo e distribuição geográfica para execução de medidas conservacionistas fica prejudicada. Torna-se necessário, portanto, não apenas criar condições para proteger a fauna, mas para torná-la melhor conhecida através da criação de mecanismos de apoio a projetos de inventariamento e estudos de taxonomia e sistemática.

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Dias, Murilo Sversut, Fernanda Aparecida da Silva Cassemiro, Dayani Bailly, Laís Salgueiro Ribeiro, Edison de Freitas Cossignani, Weferson Júnio da Graça, Augusto Frota y Gislene Torrente Vilara. "MACROECOLOGIA DE PEIXES DE RIACHOS BRASILEIROS". Oecologia Australis 25, n.º 02 (16 de junio de 2021): 512–30. http://dx.doi.org/10.4257/oeco.2021.2502.18.

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Studies in Macroecology deal with patterns and processes on large scale (spatial, temporal and taxonomic) and that by definition are too comprehensive to be studied with replicated, manipulative and controlled experiments as it has been traditionally performed in Ecology. Macroecological studies are still conducted with a focus on terrestrial vertebrates and plants, while marine systems and especially freshwater systems remain little explored. The objective of this study is to highlight some advances in the fields of study of aquatic macroecology (spatial patterns of alpha and beta diversity), using fish from Brazilian streams as the object of analysis. By gathering stream fish occurrence information from large scale data sets, we found high total richness in Amazonia, Cerrado and Atlantic Forest, and found on average seven species per sampling unit, with small variation related to the identity of the analyzed biomes. Yet, species composition is distinct between biomes and we found high turnover levels within them. We will guide the reader through possible causes and mechanisms of the identified patterns.

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Terra, Bianca de Freitas, Elvio Sergio Figueredo Medeiros, Jorge Iván Sánchez Botero, José Luis Costa Novaes y Carla Ferreira Rezende. "ECOLOGIA DE PEIXES DE RIACHOS INTERMITENTES". Oecologia Australis 25, n.º 02 (16 de junio de 2021): 605–19. http://dx.doi.org/10.4257/oeco.2021.2502.23.

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The ecology of fish from intermittent streams in the Brazilian semi-arid region is still little known. In the past twenty years, the number of researchers dedicated to this topic has increased considerably. However, significant gaps still exist when compared to the perennial streams of other regions of Brazil. Questions that address seasonal variations come up against the determination of capture methods and techniques that are efficient in the different phases of the hydrological cycle. In addition, techniques widely used in perennial systems, such as electrofishing, in most cases, have not been effective. Aspects related to biology, physiology, behavior, functional and taxonomic ecology of fish still need to be investigated taking into account seasonal and spatial scale variations. In view of the growing transformation imposed on the Brazilian semi-arid region by the extensive use of natural resources and by climate change, aquatic environments and their biodiversity are threatened by the transformation of riparian vegetation, the sewage release, the species introduction, the modification of its course and artificial perennialization. Thus, we will present and discuss, in this paper, the studies developed on the ecology of fish in the intermittent streams of the Brazilian semi-arid region and the gaps and challenges to be faced by future research.

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Benone, Naraiana Loureiro y Luciano Fogaça de Assis Montag. "MÉTODOS QUANTITATIVOS PARA MENSURAR A DIVERSIDADE TAXONÔMICA EM PEIXES DE RIACHO". Oecologia Australis 25, n.º 02 (16 de junio de 2021): 398–414. http://dx.doi.org/10.4257/oeco.2021.2502.11.

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Species diversity is defined as the variety of species and their relative abundances, and can be decomposed in local (alpha), regional (gamma) and between-communities (beta) diversity. For decades, studies with Brazilian stream fish focused on the relationship between local environmental variables and diversity patterns. However, dispersal gained notoriety for being important to the organization of communities. Besides, large scale variables are increasingly being perceived as good predictors of diversity, complementing the role of habitat variables. We present here a brief review of the methods to obtain alpha and beta taxonomic diversity, considerations regarding their predictors, and their main analysis.

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Sarmento-Soares, Luisa Maria y Ronaldo Fernando Martins-Pinheiro. "A fauna de peixes nas bacias do norte do Espírito Santo, Brasil". SITIENTIBUS série Ciências Biológicas 12, n.º 1 (8 de junio de 2012): 27. http://dx.doi.org/10.13102/scb118.

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The hydrographic basins of northern Espírito Santo comprises the systems of Itaúnas and São Mateus rivers. The present work is part of a series of studies on the fish fauna along Espírito Santo’s river basins. Forty-nine geo-referred points in rivers and rivulets of the area were evaluated, 20 in the Itaúnas basin and 28 in São Mateus basin. The environment and the taxonomic composition of the fish fauna were documented at every point, reporting a total of 83 species, including 47 freshwater species and 36 marine, belonging to 35 families and 11 orders. Among the freshwater fish species, the Siluriformes predominated, with 20 species, followed by the Characiformes, with 17 species. The Atlantic forest of northern Espírito Santo, known as “floresta de tabuleiros”, was originally composed of ombrophylous forest as well as swamps, coastal sand dunes, and mangroves. With the suppression of native forests, the region has suffered from desertification, and environmental conditions are similar to the northeastern semiarid region, where the run-off waters are dispersed or intermittent. The loss of environmental quality along river valleys is associated with the need to reestablish riverine aquatic conditions. Exotic species and risks of introductions need further studies in these areas. Rare or endangered species whose distributional range has diminished in response to environmental changes may function as biological indicators. Potentially new species are identified, and regional endemism and distribution patterns for freshwater fishes are discussed.

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Santos, Jadson, Matheus Ferreira, Kleiton Ferreira, Lucas Barros, Kaio Lima, Erick Guimarães y Danilo Lopes. "DIVERSIDADE DE PEIXES NA ZONA COSTEIRA DO ESTADO DO MARANHÃO A PARTIR DE DADOS DA PESCA ESPORTIVA". ACTA OF FISHERIES AND AQUATIC RESOURCES 9, n.º 1 (2021): 38–48. http://dx.doi.org/10.46732/actafish.2021.9.1.38-48.

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The state of Maranhão has a vast coastline that promotes the development of coastal recreational fishery, an activity that has attracted more and more fans in recent years. In this context, the objective of this work was to demonstrate the importance of sport fishing as an auxiliary source in monitoring the diversity of fish on the beaches of the metropolitan region of São Luís, Maranhão, through the monitoring of sport fishing tournaments, held in December 2018 on the beach do Olho d‟água and in July 2019, at Araçagi beach. The captured fish were stored in isothermal boxes containing ice and transported to the laboratory for taxonomic identification. 252 specimens were captured, belonging to 19 species, and distributed in 10 families. The family Sciaenidae was the most representative with 3 species. The predominant species were Conodon nobilis and Genyatremus luteus from the Haemulidae family, which together represented 39% of the specimens captured on the Olho d‟água beach and 24% on the Araçagi beach. The individuals of C. nobilis had an average weight of 29.4 ± 12.7 g and an average length of 12.3 ± 2.0 cm, with a curve of weight x length ratio represented by the equation PT = 0.034 CT2.6637 and R2 = 0, 67, with b = 2.67. While in G. luteus, the individuals had an average weight of 96.5 ± 82.2 g and an average length of 15.8 ± 4.4 cm, with a curve of the weight x length ratio represented by the equation: PT = 0.0145CT3.0999 and R2 = 0.81, with b = 3.09. The diversity of fish in beach fisheries can contribute to studies of fishery biology to support the development of management strategies and conservation of fish stocks.

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Marceniuk, Alexandre Pires, Rodrigo Antunes Caires, Wolmar Benjamin Wosiacki y Fabio Di Dario. "Conhecimento e conservação dos peixes marinhos e estuarinos (Chondrichthyes e Teleostei) da costa norte do Brasil". Biota Neotropica 13, n.º 4 (diciembre de 2013): 251–59. http://dx.doi.org/10.1590/s1676-06032013000400022.

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The tropical western South Atlantic, which includes a substantial portion of the Brazilian Exclusive Economic Zone, is a region of endemism broadly recognized as being of prime importance for the conservation of the marine biodiversity. The north coast of Brazil, which comprises the states of Amapá, Pará and Maranhão from the mouth of the rio Oiapoque to the mouth of the rio Parnaíba, harbors the largest continuous mangrove in the world, with approximately 8,900 km2. The high discharge of freshwater and continental sediments in the delta of the Amazonas affects the regime of tides, ocean currents, and several oceanographic processes of the north coast, with direct impact on the composition of the biota found in the region. Despite its economic value and intrinsic biological relevance, several aspects of the diversity of the marine and estuarine fishes of the region are poorly known. This situation results mainly from a historical imbalance in terms of the number of studies devoted to increasing the knowledge of the marine biota along the Brazilian coast, such as those dealing with species inventory and taxonomic revisions, which are typically concentrated in the south and southwestern portions of the country. The scientific production focused on marine organisms of the north coast is also imbalanced, and reflects the relatively small number of taxonomists and research groups working on that subject. The insufficient knowledge of the biodiversity of the marine and estuarine fishes of the north coast is an impediment to the implementation of adequate public policies aimed at the management of natural resources in the region. In the long term, that situation is potentially harmful in terms of conservation of a still poorly known biota. A better understanding of the marine fish fauna of the north coast of Brazil will be achieved only through the investment in scientific research and personnel training in systematics and biogeography, coupled with the modernization of the current infrastructure and expansion of scientific collections of the region.

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GALDEAN, N., M. CALLISTO y F. A. R. BARBOSA. "Biodiversity assessment of benthic macroinvertebrates in altitudinal lotic ecosystems of Serra do Cipó (MG, Brazil)". Revista Brasileira de Biologia 61, n.º 2 (mayo de 2001): 239–48. http://dx.doi.org/10.1590/s0034-71082001000200006.

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Five lotic systems of Serra do Cipó, south-east Brazil, were investigated in order to assess the existing diversity of benthic macroinvertebrates, habitats-microhabitats, and the available trophic resources. For each river it was analysed the communities of benthic macroinvertebrates and the composition of some taxonomic groups (Plecoptera, Ephemeroptera, Trichoptera and Diptera Chironomidae): the community with Bivalvia Sphaeriidae, Oligochaeta and Ephemeroptera Baetidae (being supposed a closed relation Bivalvia-Oligochaeta based on the process of bioturbation and enrichment of sediment in organic matter) in Tanque River; the macrofauna associated to aquatic macrophytes from rivers Peixe and Preto do Itambé reflecting the reaction of the ecosystems versus the quantities of nutrients which originate from the farmlands; the lithoreophilic communities of Cipó River; the community depending on deposits of leaves and filamentous algae in Congonhas Stream; the very rich community of the moss clumps in the Indaiá Stream. A proposal for biological zonation of Cipó River and some comments about the importance of the analysed benthic macroinvertebrates in the biological production of the aquatic communities were done.

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Garavello, JC, JP Garavello y AK Oliveira. "Ichthyofauna, fish supply and fishermen activities on the mid-Tocantins River, Maranhão State, Brazil". Brazilian Journal of Biology 70, n.º 3 (agosto de 2010): 575–85. http://dx.doi.org/10.1590/s1519-69842010000300014.

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This article concerns an inventory of the ichthyofauna from the main channel of the mid-Tocantins River and studies on fisheries in this region including an evaluation of activities from Colônia de Pesca Z-35 of Estreito and Carolina in Tocantins and Maranhão States, Brazil, during 1999 and 2000. This study includes taxonomy and fishery data obtained from field collections and from interviews with the fishermen, carried out in March and July of 2001. The systematic record and fishery data were obtained from the most common species of the ichthyofauna of the mid-Tocantins River. A critical examination of fish resources from this area allows us to conclude that the large commercial species have decreased in number and are qualitatively reduced in that area of Tocantins. This fact may be a result of breaking the main channel of Tocantins, first by the hydroelectric power dam of Tucurui, twenty years ago, followed by the formation of the hydroelectric reservoirs of Lageado, Peixe Angical and Serra da Mesa, that transformed the main channel of Tocantins into a successive cascade of reservoirs. Those events may perhaps modify the profile of the fish community in that area. The obtained data also permit an examination of fisheries in the area, providing an appraisal on forthcoming problems that will be faced by fishermen of Colônia de Pesca Z-35.

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PIMENTA, ALEXANDRE D. y RICARDO S. ABSALÃO. "On the taxonomy of Turbonilla puncta (C. B. Adams, 1850) (Gastropoda, Pyramidellidae), with the description of a new species from Brazil and remarks on other western atlantic species". Zootaxa 78, n.º 1 (11 de octubre de 2002): 1. http://dx.doi.org/10.11646/zootaxa.78.1.1.

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A neotype is designated for Chemnitzia puncta C. B. Adams, 1850, now placed in the genus Turbonilla and considered to be a senior synonym of Turbonilla peilei Dall & Bartsch, 1911, Turbonilla haycocki Dall & Bartsch, 1911 and Turbonilla alfredi Abbott, 1958. Turbonilla obsoleta Dall, 1892, described as a variety of T. puncta, exhibits great deal of intraspecific variation in shell morphology and is considered as valid at the specific level. Turbonilla deboeri Jong & Coomans, 1988, Turbonilla westermanni Jong & Coomans, 1988 and Turbonilla punicea Dall, 1884 share a spiral sculpture pattern very similar to T. puncta, differing in the outline of the whorls, details of the ribs and/or width of the protoconch. Turbonilla puncta, T. deboeri, T. obsoleta and T. westermanni are reported for the first time from the Brazilian coast. Turbonilla tupinamba n. sp. is described from the southeast coast of Brazil and is distinguished from the conchologically related T. puncta and T. deboeri, by the shape of the ribs, outline of the whorls and growth pattern of the shell.

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SILVA MELLO, Rosa De Lima y Rossana Maria Soares da SILVA. "Cephalopoda participantes do conteúdo estomacal de peixes pelágicos do Atlântico Sudoeste Equatorial. Taxonomia. Considerações sobre a Pesca." Tropical Oceanography 26, n.º 1 (30 de junio de 1998). http://dx.doi.org/10.5914/tropocean.v26i1.2748.

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Ota, Renata Rúbia, Gabriel de Carvalho Deprá, Weferson Júnio da Graça y Carla Simone Pavanelli. "Peixes da planície de inundação do alto rio Paraná e áreas adjacentes: revised, annotated and updated". Neotropical Ichthyology 16, n.º 2 (11 de junio de 2018). http://dx.doi.org/10.1590/1982-0224-20170094.

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ABSTRACT The book “Peixes da planície de inundação do alto rio Paraná e áreas adjacentes” represents the most cohesive data compilation for the rio Paraná floodplain. However, considering the dynamicity of the taxonomy of freshwater fishes, several new records and taxonomic changes occurred along the past years. Therefore, the results of that publication were revisited, providing an update of the species list, their taxonomic status, records and geographic distribution, and also new keys for genera and species. The species included were those recorded in the rio Paraná basin, from the mouth of the rio Paranapanema to the Itaipu Reservoir, following the general methodology presented in the book. A total of 10 orders, 41 families, 126 genera, and 211 species were registered, with an increase of one order, six families, 14 genera, and 29 species when compared to the book. Additionally, four new genera recently described, five synonymization proposals, 14 new identifications, four new combinations, 12 new species recently described, 34 new records, and nine misidentified species were recorded. These results are associated with the redirection of human and financial resources to that area, which enabled monitoring and intensive exploration of its watercourses; as well as training of taxonomists, and new taxonomic resolutions.

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Tencatt, Luiz Fernando Caserta, Marcelo Ribeiro de Britto y Carla Simone Pavanelli. "Revisionary study of the armored catfish Corydoras paleatus (Jenyns, 1842) (Siluriformes: Callichthyidae) over 180 years after its discovery by Darwin, with description of a new species". Neotropical Ichthyology 14, n.º 1 (2016). http://dx.doi.org/10.1590/1982-0224-20150089.

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ABSTRACT The taxon known as Corydoras paleatus carries one of the most complex taxonomic histories among Corydoradinae catfishes. A comprehensive review of specimens attributed to that species from several localities was carried out, allowing the clear recognition of C. paleatus and also of a new species previously misidentified as C. paleatus , described herein. Corydoras paleatus can be distinguished from its congeners by presenting the following unique combination of features: perpendicularly directed serrations along entire posterior margin of the pectoral spine; three large black blotches along midline of flank; hyaline or black pectoral fin; and transversal black bars on caudal-fin lobes. Corydoras paleatus is known from the lower rio Paraná basin, coastal rivers from Southern Brazil and Uruguay and rio Uruguai basin. The new species can be distinguished from its congeners by having the following unique combination of features: three large black blotches along midline of flank; three nasal pores; mesethmoid short; infraorbital 2 not in contact with compound pterotic; striated black spots from the snout tip to nuchal plate region; markedly rounded snout; and anterior portion of dorsal fin spotted. The new species is known from the upper rio Uruguai basin, from the rivers Canoas, do Peixe and Pelotas.

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Artículos de revistas sobre el tema "Taxonomia de peixes"

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