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| Registros recuperados: 12 | |
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| MARQUES, D. K. S.; CALHEIROS, D. F.. |
| A pesca é uma das principais atividades econômicas no Pantanal do Mato Grosso do Sul. Na década de 1990, o setor turístico pesqueiro cresceu expressivamente, gerando demandas por serviços especializados, como a captura de iscas vivas. Desde então, diversas comunidades de pescadores profissionais artesanais têm sua principal fonte de renda baseada na captura de iscas vivas destinadas principalmente ao setor turístico pesqueiro. O principal produto são as tuviras (Gymnotiformes), representando mais de 70% da captura anual de iscas vivas. Entretanto, nesta região não há conhecimento sobre a diversidade de espécies da Ordem Gymnotiformes que são exploradas comercialmente. Em outras palavras, não se sabe quantas espécies de tuviras são utilizadas como iscas... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Pesca.; Gymnotus.; Gymnotiformes. |
| Ano: 2013 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/954362 |
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| Souza-Shibatta,Lenice; Ferreira,Dhiego G.; Santos,Kátia F.; Galindo,Bruno A.; Shibatta,Oscar A.; Sofia,Silvia H.; Giacomin,Renata M.; Bastos,Douglas A.; Mendes-Júnior,Raimundo N. G.; Santana,Carlos David de. |
| Abstract Fourteen novel microsatellite loci are described and characterized in two species of electric eels, Electrophorus variiand E. voltaifrom floodplains and rivers of the Amazon rainforest. These loci are polymorphic, highly informative, and have the capacity to detect reliable levels of genetic diversity. Likewise, the high combined probability of paternity exclusion value and low combined probability of genetic identity value obtained demonstrate that the new set of loci displays suitability for paternity studies on electric eels. In addition, the cross-amplification of electric eel species implies that it may also be useful in the study of the closely related E. electricus, and to other Neotropical electric fishes (Gymnotiformes) species as tested... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon Rainforest; Electrophorus; Genetic diversity; Gymnotiformes; SSR. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000400202 |
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| 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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| Giora,Júlia; Fialho,Clarice B.; Dufech,Ana Paula S.. |
| This study aims to describe the feeding habits of a population of the weakly electric fish Eigenmannia trilineata from Southern Brazil through the monthly frequency variation of replection (RI) and hepatosomatic (HSI) indexes, condition factor (CF) and dietary analysis of the species, besides the comparison of the results with abiotic factors. We collected 428 specimens from June/2002 to May/2003 with a dip net and electric fish detector. Stomach contents were analyzed using three measurements: frequency of occurrence of food items, percentage composition per prey type and feeding importance index. Microcrustacea and autochthonous insects were the dominant food items in the stomachs of E. trilineata. The adults (males larger than 63.5 mm and females larger... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gymnotiformes; Electric-fish; Diet; Southern Brazil. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000200007 |
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| Melo,Karina Motta; Alves,Ingrid Reale; Pieczarka,Julio Cesar; David,José Augusto de Oliveira; Nagamachi,Cleusa Yoshiko; Grisolia,Cesar Koppe. |
| The frequency of spontaneous micronucleus (MN) formation in fish species needs to be determined to evaluate their usefulness for genotoxic biomonitoring. The definition of a good bioindicator takes into account the current knowledge of its metabolic traits as well as other factors including its feeding behavior and relationship to the environment. In this study, we compared the basal frequencies of micronucleated erythrocytes and nuclear abnormalities (NA) among different species of the fish Order Gymnotiformes (Rhamphichthys marmoratus, Steatogenys elegans, Sternopygus macrurus, Parapteronotus hasemani, Gymnotus mamiraua, Gymnotus arapaima, Brachyhypopomus beebei, Brachyhypopomus n. sp. BENN) sampled in several localities of the Eastern Amazon. A baseline... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomonitoring; Genotoxicity; Gymnotiformes; Amazon region; Fish erythrocytes. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000300018 |
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| Giora,Júlia; Fialho,Clarice Bernhardt. |
| This study described the reproductive biology of a population of the weakly electric fish Eigenmannia trilineata from southern Brazil, providing the information on the estimation of reproductive period, fecundity, spawning type, first maturation size, and analysis of gonadal morphology and histology of the species, relating these data to alimentary and abiotic characters. The species showed a relatively long reproductive period, a relative fecundity of 0.27 oocytes per mg of total weight and a parcelled spawning type. First maturation size estimated for the females was 80.5 mm and for the males 63.5 mm of total length. Sex ratio did not differ from 1:1 under a X²test (α= 0.01) during all the sampled months. Sexual dimorphism was related to total length,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Reproductive biology; Gymnotiformes; Eigenmannia; Abiotic factors; Southern Brazil. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000300014 |
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| Registros recuperados: 12 | |
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