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Registros recuperados: 5
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Artes de Pesca 1 (artes de malla): guía didáctica OceanDocs
Costa Labandera, M.N.; Dragonetti Saucero, J.P.; Fernández Amorín, S..
La pesca es una de las actividades humanas más antiguas. Los registros de su práctica se remontan a varios miles de años. Los productos que de ella se obtienen juegan un importante papel en la dieta humana como fuente de proteína animal, minerales y ácidos grasos esenciales, entre otros. La inmensidad del océano y su biodiversidad, dio lugar por mucho tiempo a la creencia de que el mar era una fuente ilimitada de recursos, capaz de sustentar la población humana indefinidamente. Nada parecía alertar sobre la necesidad de usar métodos de pesca racionales, ni sobre las serias consecuencias ambientales que puede conllevar la actividad pesquera. El perfeccionamiento de buques pesqueros y de las técnicas de navegación determinó un explosivo crecimiento de la...
Tipo: Book Palavras-chave: Fishing gear; Gear selectivity; Fishery resources; Resource conservation; Fishing gear; Fishery resources; Resource conservation; Http://aims.fao.org/aos/agrovoc/c_2946; Http://aims.fao.org/aos/agrovoc/c_2942; Http://aims.fao.org/aos/agrovoc/c_6523.
Ano: 2006 URL: http://hdl.handle.net/1834/2000
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Effects of land use changes on bird composition along River Njoro: A watershed of Lake Nakuru OceanDocs
Shivoga, W.A.; Ngugi, F.M.; Muchiri, M.S.; Miller, S.N..
The rift valley lakes and their associated watersheds are home for millions of resident and migratory waterfowl. However, they have been recently challenged by land use changes. Lake Nakuru (Kenya) supports diverse biological resources of global, regional and national importance. It is saline and River Njoro is its main source of freshwater. Deforestation, cultivation and urbanization in vital watershed areas have altered the hydrological regime of River Njoro. There is need to preserve and restore aquatic, riparian and terrestrial biological diversity in the watershed to be able to restore and maintain ecological health of Lake Nakuru. The impact of these recent land use changes on birds in the River Njoro Watershed is of concern to conservationists. This...
Tipo: Proceedings Paper Palavras-chave: Land use; Aquatic birds; Urbanization; Resource conservation; Resource management; Migratory species; Environment management; Protected resources; Watersheds; Lake basins; Inland waters; Environmental effects; Species diversity; Riparian environments; Aquatic birds; Urbanization; Resource conservation; Resource management; Http://aims.fao.org/aos/agrovoc/c_8898; Http://aims.fao.org/aos/agrovoc/c_8088; Http://aims.fao.org/aos/agrovoc/c_6523; Http://aims.fao.org/aos/agrovoc/c_6524.
Ano: 2006 URL: http://hdl.handle.net/1834/1499
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Explotación, usos y estado actual de la Cigua o Burgao Cittarium pica (Mollusca: Gastropoda: Trochidae) en la Costa continental del Caribe colombiano OceanDocs
Osorno Arango, A.; Díaz Merlano, J.M..
Exploitation, uses and current status of the West Indian topshell Cittarium pica (Mollusca: Gastropoda, Trochidae) along the Colombian Caribbean coast. The West Indian topshell, Cittarium pica is a common and conspicuous gastropod that thrives in Caribbean intertidal rocky shores and has been used for food by men since pre-Columbian times. Although, the exploitation of this resource is practiced only by artisanal fishermen and mainly for self-consumption, its abundance has noticeably reduced in the last ten years, so the species has been included in the endangered animal lists of several Caribbean countries, including Colombia. The present study was carried out to assess the current status of the population of C. pica along the Colombian Caribbean mainland...
Tipo: Journal Contribution Palavras-chave: Marine molluscs; Resource conservation; Resource conservation; Http://aims.fao.org/aos/agrovoc/c_6523.
Ano: 2006 URL: http://hdl.handle.net/1834/1974
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Hacia una cuantificación de estrés ecológico en el embalse de Rincón del Bonete (Uruguay) OceanDocs
Amestoy, F.J..
La presente tesis respondió preguntas importantes para el conocimiento del embalse de Rincón del Bonete (EdRB) y para la obtención de los puntos de referencia para la determinación de estrés ecológico en el mismo. Los objetivos específicos comprendieron la determinación de los aspectos limnológicos más relevantes, la caracterización del embalse según su estado trófico, así como el conocimiento del estado de explotación de la especie íctica mas relevante desde el punto de vista comercial. Se determinaron indicadores que permitieron aportar información de base para cuantificar el grado de perturbación del embalse a fin de adoptar estrategias de conservación y manejo, así como definir las zonas más sensibles de impacto ambiental. Se evaluó la variabilidad...
Tipo: Theses and Dissertations Palavras-chave: M40; Limnology; Environmental monitoring; Artificial lakes; Resource conservation; Ecological balance; Indicators; Echo surveys; Freshwater lakes; Experimental fishing; Biomass; Limnology; Environmental monitoring; Biomass; Artificial lakes; Resource conservation; Ecological balance; Http://aims.fao.org/aos/agrovoc/c_4343; Http://aims.fao.org/aos/agrovoc/c_37876; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_8961; Http://aims.fao.org/aos/agrovoc/c_6523; Http://aims.fao.org/aos/agrovoc/c_34928.
Ano: 2001 URL: http://hdl.handle.net/1834/2611
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The role of the Yala swamp lakes in conservation of Lake Victoria region haplochromine cichlids: evidence from molecular genetic and trophic ecology studies OceanDocs
Abila, R.; Salzburger, W.; Ndonga, M.F.; Owiti, D.O.; Barluenga, M..
Lake Kanyaboli (Kenya), a satellite lake of Lake Victoria, has been suggested as a potential refugium for haplochromine cichlids that have gone extinct in Lake Victoria. We employed mitochondrial DNA and microsatellite DNA molecular markers as well as feeding ecology studies to re- evaluate the evolutionary and ecological significance of Lake Kanyaboli haplochromines. The mitochondrial DNA and microsatellite markers revealed high genetic diversity in the endangered Xystichromis phytophagus and also the presence of mtDNA haplotypes that may have either gone extinct in Lake Victoria or have arisen in situ. Lake Kanyaboli thus acts as a ‘genetic reservoir’ for the Lake Victoria species flock. Gut content analysis revealed six trophic groups among the six...
Tipo: Proceedings Paper Palavras-chave: Tropical fish; Genetics; Swamps; Lakes; Resource conservation; Environment management; Rare resources; Resource management; Trophic relationships; Genetic diversity; Swamps; Inland waters; Water reservoirs; Freshwater lakes; Species extinction; Ecological efficiency; Genetics; Swamps; Lakes; Swamps; Inland waters; Water reservoirs; Species extinction; Resource conservation; Resource management; Http://aims.fao.org/aos/agrovoc/c_3222; Http://aims.fao.org/aos/agrovoc/c_7544; Http://aims.fao.org/aos/agrovoc/c_4160; Http://aims.fao.org/aos/agrovoc/c_7544; Http://aims.fao.org/aos/agrovoc/c_3876; Http://aims.fao.org/aos/agrovoc/c_8324; Http://aims.fao.org/aos/agrovoc/c_17744; Http://aims.fao.org/aos/agrovoc/c_6523; Http://aims.fao.org/aos/agrovoc/c_6524.
Ano: 2006 URL: http://hdl.handle.net/1834/2130
Registros recuperados: 5
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