942 resultados para Pesca esportiva


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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Aquicultura - FCAV

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Pós-graduação em Aquicultura - FCAV

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Pós-graduação em Ciências Biológicas (Zoologia) - IBB

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Pós-graduação em Ciências Biológicas (Zoologia) - IBB

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Perciformes are dominant in the marine environment, characterized as the largest and most diverse fish group. Some families, as Gerreidae, popularly known as silver jennies, carapebas, or mojarras have a high economic potential to marine fish farming, natural explotation and game fishing. Genetic information of these species are of fundamental importance for their management and production. Despite exist over 13,000 marine fish species described, only 2% were cytogenetically analyzed and less than 1% have some reproductive characteristics known. Induced breeding, cytogenetic characterization and cryopreservation of gametes, represent important areas in applied fish studies. In this project cytogenetic analyzes were performed to acess genetic aspects of Gerreidae species, distributed in coastal and estuarine regions of Northeast Brazil. Different methods for identifying chromosomal regions were employed using conventional techniques (Ag-NORs, C-banding), staining with base-specific fluorochromes (DAPI-CMA3), and physical mapping of ribosomal genes 18S and 5S rDNA, through hybridization in situ with fluorescent probes (FISH). The six species analyzed showed remarkable chromosome conservatism. The 18S and 5S ribosomal genes when analyzed in phylogenetic perspective demonstrate varied evolutionary dynamics, suggesting ocurrence of stasis process in some groups and greater dynamism in others. Double FISH with 18S and 5S probes showed both how efficient cytotaxonomic markers in the homogeneous karyotypes of this group of species. The karyotypic pattern identified in addition to the evolutionary aspects of karyotype, are suggestive of existence of low potential of post-zygotic barrier, prompting further research to prospect for artificial interspecific hybridization of these species of commercial importance

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Consultoria Legislativa- Área XI - Meio Ambiente e Direito Ambiental, Organização Territorial, Desenvolvimento Urbano e Regional.

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[ES]Rumbo al Gran Banco parte de los comienzos de la pesca industrial del bacalao española en el primer tercio del siglo XX, la situación que allí encontraron, los avatares humanos y los avances tecnológicos que se van incorporando, la Guerra Civil y la guerra mundial, la bonanza pesquera, la incorporación de las parejas, la concurrencia, así como la exploración de todo el Gran Banco. La gestión por parte de Canadá de las doscientas millas marinas y la moratoria del bacalao. También se presenta la historia de la pesca en Galicia y Terranova a lo largo de todo el siglo XX, dos territorios que comparten el mismo océano y una mirada puesta en la mar.

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Notas sobre las condiciones de la pesca, economía pesquera y comentarios adiciones durante la excursión realizada por Lahille durante setiembre a octubre de 1895, a localidades marítimas y cuerpos de agua dulce de la provincia de Buenos Aires.

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(PDF has 100 pages.)

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[pdf has 107 pages]