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Registros recuperados: 5
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Análisis espacio-temporal del estado nutricional de larvas de anchoíta Engraulis anchoita. Relación con las características hidrográficas y la disponibilidad de alimento OceanDocs
Díaz, M.V..
Nutritional condition studies allow the assessment of physiological state of each larva and thus, the establishment of favourable nursery areas which provide better survival and growth. In the present work, morphometrical, histological and biochemical techniques were employed to assess nutritional condition of anchovy, Engraulis anchoita, larvae captured in the Argentine Sea. Its results were complemented with oceanographic data and information about zooplankton abundances, both prey and predators of anchovy larvae. Anchovy larvae abundance and distribution would be mainly determined by physico-chemical variables. Even though no significant differences were found in larval nutritional condition among the studied areas, larval condition was slightly better...
Tipo: Theses and Dissertations Palavras-chave: Fish larvae; Nutritional requirements; Morphometry; Histology; Hydrography; Nursery grounds; Fish larvae; Nutritional requirements; Hydrography; Nursery grounds; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_5277; Http://aims.fao.org/aos/agrovoc/c_3727; Http://aims.fao.org/aos/agrovoc/c_25438.
Ano: 2010 URL: http://hdl.handle.net/1834/3548
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¿Existen variaciones interanuales en el crecimiento larval de anchoíta bonaerense (Engraulis anchoita)? OceanDocs
Barretto, A.C.; Chandler, D.E.; Gómez, M.I..
Se determinaron las tasas de crecimiento de larvas de la anchoíta argentina (Engraulis anchoíta) provenientes de la plataforma bonaerense, contando y midiendo incrementos diarios en sus otolitos sagitta. Las larvas se capturaron en diferentes años y durante diferentes épocas (otoño de 1999; invierno de 2000 y primavera de 2002, 2003 y 2004)a los fines de analizar diferencias interanuales en el crecimiento. Se observó que tanto el crecimiento de las larvas como el del otolito estaban acoplados. Las tasas de crecimiento se calcularon en forma individual (para cada larva) o a partir de modelos largo-edad. Dichos valores no resultaron significativamente distintos entre las primaveras y promediaron 0.44 mm/día. Tampoco hubo diferencias entre las temperaturas...
Tipo: Theses and Dissertations Palavras-chave: Age; Growth; Hydrography; Annual variations; Fish larvae; Growth; Age; Hydrography; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_186; Http://aims.fao.org/aos/agrovoc/c_3727; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 2005 URL: http://hdl.handle.net/1834/2605
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Masas de agua en la plataforma continental OceanDocs
Guerrero, R.A.; Piola, A.R..
The current knowledge on the argentine continental shelf water masses is summarized in this paper. These water masses are characterized as a function of water types fed by the boundary currents and the modifications due to continental runoff, and water energy exchange with the atmosphere. Based on sea surface salinity distributions and the temperature-salinity characteristics, three masses are described: coastal waters, mid-shelf waters and slope waters. The main freshwater sources found along the coast are identified, as well as high salinity formation areas. The vertical stratification, mainly controlled by temperature, is analyzed along the annual cycle. The stratification cycle is mainly driven by the heat exchange between the atmosphere and the ocean....
Tipo: Book Section Palavras-chave: Continental shelves; Water masses; Hydrography; Water circulation; Oceanic fronts; Stratification; Water circulation; Stratification; Hydrography; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_8314; Http://aims.fao.org/aos/agrovoc/c_7438; Http://aims.fao.org/aos/agrovoc/c_3727; Http://aims.fao.org/aos/agrovoc/c_32413.
Ano: 1997 URL: http://hdl.handle.net/1834/1703
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Sénégal, Sine Saloum, Gambie, Casamance hydrographie pêche crevettière OceanDocs
Lhomme, F..
Tipo: Book Palavras-chave: Shrimp fisheries; Hydrography; Statistics; Hydrography; Http://aims.fao.org/aos/agrovoc/c_3727.
Ano: 1978 URL: http://hdl.handle.net/1834/2887
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Variación espacial de la biodiversidad mesozooplantónica en un sector de la plataforma costera bonaerense (34°-41° S) OceanDocs
Cepeda, G..
En las últimas décadas ha crecido la conciencia a nivel mundial de que la biodiversidad en el océano está sufriendo importantes alteraciones debido a la actividad humana y al cambio climático global, y de que estas alteraciones en muchos casos son irreversibles. Por tal motivo diversos autores señalan la necesidad de enfatizar los estudios de biodiversidad en todos los ambientes marinos (Angel, 1991; Lasserre, 1991; Gray, 2001). Actualmente se están realizando grandes esfuerzos a nivel internacional para incrementar el conocimiento de la diversidad, distribución y abundancia de la vida marina en general (Proyecto Census of Marine Life; www.coml.org) y del zooplancton en particular (Proyecto Census of Marine Zooplankton; www.cmarz.org). La biodiversidad de...
Tipo: Theses and Dissertations Palavras-chave: Zooplankton; Environmental conditions; Hydrography; Abundance; Assemblages; Identification keys; Geographical distribution; Geographical distribution; Zooplankton; Environmental conditions; Hydrography; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_32980; Http://aims.fao.org/aos/agrovoc/c_3727.
Ano: 2006 URL: http://hdl.handle.net/1834/2951
Registros recuperados: 5
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