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| Registros recuperados: 80 | |
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| Oliveira,Andreza S.; Py-Daniel,Lúcia Rapp; Zawadzki,Cláudio H.. |
| ABSTRACT The cis-Andean genus Aphanotorulus was recently revised and comprises six valid species: A. ammophilus, A. emarginatus, A. gomesi, A. horridus, A. phrixosoma and A. unicolor. Herein, a new species is described from tributaries of the rio Aripuanã basin, in Amazonas and Mato Grosso states, Brazil. The new species is easily distinguished from congeners by its color pattern: caudal fin with upper lobe mostly hyaline with dark spots along rays and membranes, and lower lobe red and without dark spots; and absence of dark spots in the lateral series of mid-ventral plates. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon basin; Fishes; Hypostominae; Taxonomy. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000100208 |
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| Cabrera Páez, Y.. |
| Se realizó una investigación con el objetivo de evaluar las alteraciones de los procesos biológicos en los peces que viven en sitios muy contaminados. Se aplicó una metodología basada en los efectos acumulativos de agentes estresantes múltiples a nivel de individuo en la especie Gambusia puncticulata (Poey, 1854). Este estudio se efectuó en tres sitios del río Almendares: El Rodeo, considerado como sitio de referencia, y dos sitios altamente contaminados, el Bosque de La Habana y el Puente 23. Se encontró un incremento en el largo y el peso de las hembras, y en el factor de condición para ambos sexos en los sitios más impactados. Este resultado se atribuye a la mayor disponibilidad de alimento debido a la eutrofización. El índice... |
| Tipo: Theses and Dissertations |
Palavras-chave: Fishes; Biological contamination; Eutrophication. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/5516 |
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| Almeida-Val,Vera Maria Fonseca; Oliveira,Alice Reis; Silva,Maria de Nazaré Paula da; Ferreira-Nozawa,Monica Stropa; Araújo,Roziete Mendes; Val,Adalberto Luis; Nozawa,Sérgio Ricardo. |
| Adaptation or acclimation to hypoxia occurs via the modulation of physiologically relevant genes, such as erythropoietin, transferrin, vascular endothelial growth factor, phosphofructokinase and lactate dehydrogenase A. In the present study, we have cloned, sequenced and examined the modulation of the LDH-A gene after an Amazonian fish species, Astronotus crassipinis (the Oscar), was exposed to hypoxia and anoxia. In earlier studies, we have discovered that adults of this species are extremely tolerant to hypoxia and anoxia, while the juveniles are less tolerant. Exposure of juveniles to acute hypoxia and anoxia resulted in increased LDH-A gene expression in skeletal and cardiac muscles. When exposed to graded hypoxia juveniles show decreased LDH-A... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amazon; Fishes; Gene expression; RT-PCR; LDH-A; Hypoxia; Anoxia. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000200025 |
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| Giora,Júlia; Fialho,Clarice B.. |
| The feeding biology of Steindachnerina brevipinna (Eigenmann & Eigenmann, 1889) is described based on specimens collected in the Ibicuí-Mirim river, Rio Grande do Sul, Brazil, from April 2001 to March 2002. Diet description is based on the analysis of the frequency of occurrence and index of dietary importance of the ingested items. The monthly variation of stomach repletion, hepatosomatic and intestinal indexes was also analyzed. Major feeding activity occurred before (May, June and July 2001) the reproductive period, with the hepatosomatic index values showing similar variation along the year. Both the mean intestinal quotient and the analysis of the main ingested items (Bacillariophyta and Chlorophyta algae) indicate a detritivorous diet. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Detritivory; Feeding; Steindachnerina; Fishes. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212003000300007 |
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| CAVERO, B.A.S.; PEREIRA-FILHO, M.; ROUBACH, R.; ITUASSÚ, D.R.; GANDRA, A.L.; CRESCÊNCIO, R.. |
| O objetivo deste trabalho foi estimar a biomassa sustentável de juvenis de pirarucu Arapaima gigas (Cuvier, 1829) mantidos em tanques-rede de pequeno volume. Durante 200 dias os peixes foram estocados em quatro tanques-rede de 1 m3, cada um com biomassa inicial total de 0,84±0,14 kg (21 peixes/tanque-rede). Os tanques-rede foram colocados em um viveiro de 50 m2 com renovação constante de água. Os índices do fator de condição, da conversão alimentar, do crescimento específico e do ganho de biomassa revelaram que a biomassa sustentável de juvenis de pirarucu para a criação intensiva em tanques-rede de 1 m3 foi de aproximadamente 29 kg. O comprimento alcançado pelo peixe, no espaço reduzido do tanque-rede, é um fator limitante para manter bons índices... |
| Tipo: Artigo em periódico indexado (ALICE) |
Palavras-chave: Arapaima gigas; Peixe; Alimentação; Crescimento; Piscicultura; Fishes; Feeding; Growth; Fish culture. |
| Ano: 2003 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/109102 |
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| Lima,Felipe P. de; Nobile,André B.; Freitas-Souza,Diogo; Carvalho,Edmir D.; Vidotto-Magnoni,Ana P.. |
| ABSTRACT Dams are considered an important source of modification upon the structure of aquatic communities and their reflexes are diverse on the fish fauna. Although there are several hydroelectric power plants in Brazil, the long-term effects on feeding activity of ichthyofauna are unknown. Thus, this study aimed to investigate the long-term effects of an old reservoir (fifty years) on the trophic dynamics of fish fauna. The diet of 20 fish species was analyzed, identifying 37 food items belonging to six trophic categories, which enable to create six trophic groups. The results found here suggests that throughout the creation of a reservoir, the trophic structure of the fish assemblages tend to reach trophic homeostasis, in which the fish community will... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feeding ecology; Old dam; Trophic stabilization; Resource availability; Fishes. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212018000100230 |
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| Bertrand, Jacques; Bodiguel, Xavier; Abarnou, Alain; Reynal, Lionel; Bocquene, Gilles. |
| Chlordecone is a very persistent insecticide used in banana plantations of the French West Indies between 1972 and 1993. Chlordecone residues were found in inland water, in agricultural and freshwater products, and in marine organisms. This pollution has become of great concern in 2007. Therefore, a governmental action Plan was launched to better assess the pollution and to improve the consumer’s protection. Within this plan, 1048 samples from 69 different species of marine fishes and crustaceans were collected all around both the Guadeloupe and the Martinique Islands and analyzed. The results confirm the presence of chlordecone in marine organisms, with highly variable concentrations (from the detection limit to 1000 μg.kg-1). In 17.9 % of the samples,... |
| Tipo: Text |
Palavras-chave: Chlordecone (Kepone); French West Indies; Fishes; Crustaceans; Organochlorinated contaminant; Risk assessment; Pollution management. |
| Ano: 2010 |
URL: http://archimer.ifremer.fr/doc/00014/12511/9361.pdf |
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| Morato, Telmo; González‐irusta, José‐manuel; Dominguez‐carrió, Carlos; Wei, Chih‐lin; Davies, Andrew; Sweetman, Andrew K.; Taranto, Gerald H.; Beazley, Lindsay; García‐alegre, Ana; Grehan, Anthony; Laffargue, Pascal; Murillo, Francisco Javier; Sacau, Mar; Vaz, Sandrine; Kenchington, Ellen; Arnaud-haond, Sophie; Callery, Oisín; Chimienti, Giovanni; Cordes, Erik; Egilsdottir, Hronn; Freiwald, André; Gasbarro, Ryan; Gutiérrez‐zárate, Cristina; Gianni, Matthew; Gilkinson, Kent; Wareham Hayes, Vonda E.; Hebbeln, Dierk; Hedges, Kevin; Henry, Lea‐anne; Johnson, David; Koen‐alonso, Mariano; Lirette, Cam; Mastrototaro, Francesco; Menot, Lenaick; Molodtsova, Tina; Durán Muñoz, Pablo; Orejas, Covadonga; Pennino, Maria Grazia; Puerta, Patricia; Ragnarsson, Stefán Á.; Ramiro‐sánchez, Berta; Rice, Jake; Rivera, Jesús; Roberts, J. Murray; Ross, Steve W.; Rueda, José L.; Sampaio, Íris; Snelgrove, Paul; Stirling, David; Treble, Margaret A.; Urra, Javier; Vad, Johanne; Oevelen, Dick; Watling, Les; Walkusz, Wojciech; Wienberg, Claudia; Woillez, Mathieu; Levin, Lisa A.; Carreiro‐silva, Marina. |
| The deep sea plays a critical role in global climate regulation through uptake and storage of heat and carbon dioxide. However, this regulating service causes warming, acidification and deoxygenation of deep waters, leading to decreased food availability at the seafloor. These changes and their projections are likely to affect productivity, biodiversity and distributions of deep‐sea fauna, thereby compromising key ecosystem services. Understanding how climate change can lead to shifts in deep‐sea species distributions is critically important in developing management measures. We used environmental niche modelling along with the best available species occurrence data and environmental parameters to model habitat suitability for key cold‐water coral and... |
| Tipo: Text |
Palavras-chave: Climate change; Cold-water corals; Deep-sea; Fisheries; Fishes; Habitat suitability modelling; Octocorals; Scleractinians; Species distribution models; Vulnerable marine ecosystems. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00610/72211/71007.pdf |
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| Lara Lorenzo, A.. |
| En el presente trabajo se realizó el análisis del código de barras ADN de 24 especies de la ictiofauna dulceacuícola cubana. Para ello, se secuenciaron 652pb del gen mitocondrial citocromo oxidasa I (COI) de 96 individuos provenientes de diferentes áreas geográficas y representativos, en la mayoría de los casos, de la distribución espacial de cada especie. En el análisis se utilizó la distancia genética Kimura 2 parámetros (K2P), considerando como cota superior el valor de 3%, para identificar los límites de divergencia entre especies. Complementariamente se llevó a cabo un análisis de agregación poblacional para identificar grupos poblacionales indicativos de linajes evolutivos independientes. El estimado promedio de divergencia genética entre... |
| Tipo: Theses and Dissertations |
Palavras-chave: CDNA; Genes; Fishes; Fish wastes. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/5514 |
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| Porteiro, F.M.; Barreiros, J.P.; Afonso, P.; Santos, R.S.; Worms, J.; Wirtz, P.. |
| Little is known about the ichthyofauna of the São Tomé and Príncipe archipelago. Since the early works of Osório, at the turn of the century, only few attempts were made to update and complete existing knowledge on fish systematics and biodiversity from this area. Over the past few years, however, several surveys made it possible to start an inventory of the coastal fishes for the archipelago. These are mainly based on specimens that where captured or observed whilst diving and also on fishes landed on beaches by local artisanal fishermen. A total of 124 species belonging to 108 genera and 61 families was identified. Some specimens, including Serranidae, Gobiidae and Labridae probably belong to undescribed species and are currently being studied. |
| Tipo: Journal Contribution |
Palavras-chave: Fishes; Gulf of Guinea; São Tomé e Principe; Checklist; Marine fish; Ichthyofauna. |
| Ano: 1999 |
URL: http://hdl.handle.net/1834/704 |
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| UEDA,Ivete Kotomi; EGAMI,Mizue Imoto; SASSO,Wilson da Silva; MATUSHIMA,Eliana Reiko. |
| Morphologicaly, seven types of cells were identified in the blood of Oreochromis niloticus: erythrocytes, thrombocytes, neutrophils, eosinophils, basophils, lymphocytes and monocytes. Glycogen was present not only in the cytoplasm of neutrophils and thrombocytes but also in some lymphocytes and monocytes. The positive reaction for myeloperoxidase and Sudan black was observed in neutrophils and eosinophils. The bromphenol blue method was strongly positive for erythrocytes and eosinophils. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Blood cells; Cytochemistry; Oreochromis niloticus; Fishes. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95962001000600005 |
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| IZEL, A. C. U.; PERIN, R.; MELO, L. A. S.. |
| Experimento sobre a determinacao de niveis proteicos, tecnica e economicamente adequados para a criacao de matrinxa (Brycon cephalus) foi conduzido durante nove meses nas instalacoes do CPAA, na Rod. AM-010, km 29, Manaus, AM, onde foram testados os niveis de proteina bruta (PB) de 17,22% a 27%, em racoes isocaloricas. A utilizacao de 27% de PB permitiu a obtencao dos maiores comprimentos (p<0,05) e maiores ganhos de peso (p<0,01), nao havendo diferenca no consumo de racao. A equacao de regrressao ajustada para o ganho de peso foi significativa. As equacoes ajustadas para ganho de peso, conversao alimentar aparente e eficiencia proteica foram significativas (p<0,05), com a racao de nivel mais alto de proteina apresentando os melhores resultados.... |
| Tipo: Artigo em anais de congresso (ALICE) |
Palavras-chave: Peixe; Matrinxa; Brycon cephalus; Nutricao; Desempenho; Ganho de peso; Brasil; Amazonas; Fishes; Nutrition; Performance; Weight gain. |
| Ano: 1996 |
URL: http://www.alice.cnptia.embrapa.br/handle/doc/667487 |
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| Reyes Canino, R.; Suárez Cuba, A.; Damas, T.. |
| Se examina el efecto de las hormonas luteinizantes LHRH y LRH-A sobre la vitelogénesis y maduración artificial de hembras en estado de anguila amarilla. Con ambas hormonas se realizaron dos experiencias con dosis de 2 µg/kg p.c./semana durante 9 y 15 semanas. Como resultado de estas investigaciones se observó un mejor desarrollo de los ovocitos con la hormona LRH-A. Se discute acerca de la influencia de las características biológicas de los animales tratados en la maduración gonadal así como el empleo de mezclas hormonales gonadotrópicas en la obtención de mejores resultados. |
| Tipo: Journal Contribution |
Palavras-chave: Fishes; Eels; Http://aims.fao.org/aos/agrovoc/c_2490. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/4136 |
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| IZEL, A. C. U.. |
| Estudos sobre as necessidades proteicas do matrinxa, visando proporcionar maior crescimento em menor espaco de tempo. Foram testados cinco niveis de proteina bruta, em racoes isocaloricas, em delineamento experimental inteiramente casualizado. Com base nos resultados, apos 210 dias de estudos, ficou demonstrado que as racoes contendo 25% e 28% de proteina bruta proporcionaram maior crescimento corporal e melhor conversao alimentar, dentre os niveis testados. Foi observado, tambem, que a melhor relacao entre o crescimento corporal, conversao alimentar e custo com racao por kg de peixe produzido ocorre com a utilizacao de racao com nivel de proteina bruta proximo a 28%, indicando que esse nivel pode atender a contento as exigencias proteicas dessa especie... |
| Tipo: Tese/dissertação (ALICE) |
Palavras-chave: Brasil; Amazonas; Manaus; Fishes; Matrinxã; Nutrição; Brycon cephalus; Nutrition. |
| Ano: 2000 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/670511 |
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| Registros recuperados: 80 | |
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