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| Registros recuperados: 196 | |
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| Barahona, N.; Young, Z.; Gálvez, P.; Orensanz, J.M.; Cornejo, S.; Mejías, P.; Miranda, H.; Jerez, G.; Carrasco, J.. |
| El propósito de este proyecto fue diseñar e implementar un sistema de monitoreo biológico-pesquero, geográficamente orientado al levantamiento de información de las actividades extractivas del recurso erizo en la XII Región. Para alcanzar el objetivo general del proyecto, se planteó iniciar un proceso de toma de datos complementario al ejecutado por el proyecto Investigación Situación Pesquerías Bentónicas, en el marco de una Pesca de Investigación. En la propuesta técnica, el período comprometido con actividades en terreno, fue de tres meses; se hicieron algunos ajustes a la programación y se traspasaron algunas actividades a la fase II de este estudio. De esta manera se continuó con la toma de datos durante todo el período de extracción, marzo a agosto... |
| Tipo: Report |
Palavras-chave: Fishery surveys; Monitoring; Catch/effort; Resource management; Benthos; Biological data; Benthos; Monitoring; Resource management; Http://aims.fao.org/aos/agrovoc/c_878; Http://aims.fao.org/aos/agrovoc/c_4911; Http://aims.fao.org/aos/agrovoc/c_6524. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1809 |
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| Ben Mustapha, K.; El Abed, A.; Komatsu, T.; Souissi, A.; Sammari, Ch.; Zarrouk, S; Hattour, A.. |
| Several marine campaigns aiming to collect marine demosponges for specific research projects on their taxonomy and biogeography and to study the phenology and distribution of Posidonia oceanica a long the Tunisian coasts were conducted these last 10 years. They allowed a scuba diving prospecting of the infra and circalittoral zones of 555 marine stations. This field work was an occasion to describe some bottom’s associations, to highlight the general state of the main communities, specially the Posidonia and the coralligenous formations, and to draw up a list of their mega benthic species. In general, both biota are well preserved along the Tunisian coasts. except for some black spots, mainly the one of the gulf of Gabes, where detailed analysis showed... |
| Tipo: Journal Contribution |
Palavras-chave: Eponges; Ascidians; Coralligenous; Posidonia oceanica; Bryozoans; Benthos; Sponges. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/222 |
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| Villamar, F.. |
| As a result of taxonomic analysis and the abundance of benthic polychaetes abtained from the subtidal area in five profiles with 15 stations at depths between 3 and 23 m. in Manta Bay, eight species were identified in march, the most abundant one being Cossura brunnea of the Cossuridae family. Eight species were identified in august, represented by the most abundant species, Paraonis gracilis from the Paraonidae family. For the intertidal zone, five profiles in five different areas were analyzed, using techniques recommended by Roger J. Lincoln & Gordon Sheals (1979). Two species were identified in march and four in august, with the most frquent and abundant species being Anaitides madeirensis of the Phyllodocidae family in both seasons of the year.... |
| Tipo: Journal Contribution |
Palavras-chave: Benthos; Taxonomy; Species diversity; Seasons; Environmental factors. |
| Ano: 2013 |
URL: http://hdl.handle.net/1834/5756 |
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| Fishar, M.R.A.; Ali, M.H.H.. |
| Concentrations of major metals (Na, K, Ca, Mg) and some trace metals (Fe, Zn, Mn, Ni, Cu, Co, Pb, Cr, Cd) were determined in water, sediment, benthos and some common fish species from Lake Qarun. Water and sediment samples were collected from seven stations where, the benthos and fish species were collected from three sites representing east, middle and west of the lake. Distribution of studied metals showed that, east part generally had higher contamination than west one which may be attributed to the impact of pollution sources in this area which coming from El-Batts Drain and pumping station in the east part. Mollusca and Crustacea especially Barnacles have the highest concentrations of most heavy metals measured more than Polychaeta which make them... |
| Tipo: Journal Contribution |
Palavras-chave: Lake Qarun; Trace metals; Benthos; Fish SEDIMENTS Absorption coefficient Accumulation Biochemical analysis Benthic fish Trace metals Absorption http://aims.fao.org/aos/agrovoc/c_27. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1215 |
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| Uribe, P.. |
| En la Antártica se ha descrito un grupo de microalgas (diatomeas bentónicas), que viven en el fondo, pegadas a las piedras o sedimentos, capaces de hacer fotosíntesis con niveles de luz muy bajos e incluso cubiertas por una capa de hielo marino. El proyecto “Identificación de biomarcadores de fluctuaciones de la cobertura de hielo en diatomeas bentónicas de la Península Antártica” busca conocer las características fisiológicas que determinan la adaptación de estas microalgas al medio polar, características que luego sirvan como marcadores biológicos (o biomarcadores) de esta capacidad de vivir en las zonas más oscuras. Paulina Uribe describe este proyecto y establece un curioso vínculo con las ideas y circunstancias de Darwin. |
| Tipo: Journal Contribution |
Palavras-chave: Algae; Biomarkers; Benthos; Benthos; Algae; Http://aims.fao.org/aos/agrovoc/c_878; Http://aims.fao.org/aos/agrovoc/c_258. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/3366 |
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| Sankaré, Y.; Etien, N.. |
| Cet article présente les résultats d'une étude comparative de trois séries de prélèvements dans la zone proche du canal de Bassam avant, 6 mois et 20 mois après son ouverture en septembre 1987. Les effets constatés sont la diminution de l'abondance et la modification de la composition de la macrofaune benthique. Ces effets semblent de longue durée, sans reprise en ce qui concerne l'espèce la plus abondante, Corbula trigona. Les changements observés dans la structure des peuplements sont dus essentiellement à l'augmentation de la salinité, et à un degré moindre, aux modifications de la nature du sédiment. |
| Tipo: Journal Contribution |
Palavras-chave: Benthos; Channels; Estuaries. |
| Ano: 1991 |
URL: http://hdl.handle.net/1834/5521 |
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| Afli, A.; Ibin Chaabane, K.; Chakroun, R.; Jabeur, Ch.; Ramos-Espla, A.A.. |
| In this study, 21 stations were sampled, 11 in the Djerba island coast and 10 in the western coast of Tunis bay. Then, samples were sifted on a square mesh of 1 mm a side, and the animals collected were identified and counted. Lacking an efficient single index suitable for application in all situations, several traditional nonparametric indices of biodiversity were selected, calculated and discussed. Results show that the community composition is totally different in the two studied sites, and, within each site, several species are common, butthey exchange the leader ranks from one station to another. For biodiversity measurement and since results show varying values depending on indices at several stations, an arithmetic mean index was calculated at each... |
| Tipo: Journal Contribution |
Palavras-chave: Benthos. |
| Ano: 2013 |
URL: http://hdl.handle.net/1834/5905 |
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| Piñero, R.A.. |
| La costa patagónica y en especial el golfo San Jorge (Mar Argentino, Atlántico sudoccidental), son zonas de gran interés pesquero, destacándose este último por poseer una de las especies de mayor valor comercial del Mar Argentino: el langostino patagónico Pleoticus muelleri. En un nuevo concepto de análisis integrado, se estudia la relación de los recursos con su ambiente. En el caso particular del langostino, dado su hábito bentónico, resulta de importancia acceder al conocimiento sobre las distintas especies que conforman las comunidades bentónicas y sus interrelaciones. El estudio de las comunidades bentónicas del Golfo San Jorge ha sido realizado por Roux et al. (1995, 1997) consistiendo principalmente en la confección de un amplio inventario... |
| Tipo: Theses and Dissertations |
Palavras-chave: Geographical distribution; Taxonomy; Benthos; Ecological associations; Abundance; Feeding behaviour. |
| Ano: 2001 |
URL: http://hdl.handle.net/1834/5031 |
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| González, J.; Tapia, C.; Wilson, A.; Stotz, W.; Orensanz, J.M.; Parma, A.M.; Valero, J.; Catrilao, M.; Garrido, J.. |
| En la III y IV Regiones las áreas de manejo y explotación de recursos bentónicos (AMERB) se han establecido como la principal herramienta de manejo del recurso loco (Concholepas concholepas). Sin embargo, su aplicabilidad para la administración y aporte en términos del desarrollo sustentable, aunque sugerentes, requieren de una evaluación objetiva, en cuanto al manejo de carácter discreto que se ha establecido para cada AMERB, desconociendo la eventual interacción espacial de las mismas. En este marco, se desarrolla una aproximación para evaluar el desempeño de las AMERBs desde una perspectiva integral bajo un enfoque metapoblacional. Si bien el estudio está orientado a proporcionar la información de campo que permita probar la hipótesis de metapoblaciones... |
| Tipo: Report |
Palavras-chave: Natural populations; Fishery resources; Exploitation; Resource management; Benthos; Benthos; Fishery resources; Resource management; Http://aims.fao.org/aos/agrovoc/c_878; Http://aims.fao.org/aos/agrovoc/c_2942; Http://aims.fao.org/aos/agrovoc/c_6524. |
| Ano: 2005 |
URL: http://hdl.handle.net/1834/1754 |
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| Fernández, M.. |
| This is a study on surficial sediments and bottom water physico-chemical characteristics of the San Jorge Gulf (SW Atlantic, Argentina)during spring 1999 - winter 2000 (first studied period), autumn 2001- summer 2002 (second studied period)and winter 2003 (third studied period), based on samples obtained during research cruises carried out on board of the INIDEP (Instituto Nacional de Investigación y Desarrollo Pesquero)research vessels. Environmental variables such as temperature, salinity, density, oxygen and bottom water chlorophyll a content as well as granulometric fractions, total organic matter, total organic carbon, total nitrogen, total phosphorous, chlorophyll a and phaeopigments in sediment concentration and depth were analyzed. The origen and... |
| Tipo: Theses and Dissertations |
Palavras-chave: Physicochemical properties; Benthic environment; Organic matter; Shrimp fisheries; Benthos; Organic matter; Benthos; Physicochemical properties; Benthic environment. |
| Ano: 2006 |
URL: http://hdl.handle.net/1834/3134 |
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| Registros recuperados: 196 | |
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