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Registros recuperados: 11
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Aspectos de la biología de Portunus spinicarpus Stimpson 1871 (Decapoda: Portunidae) en el Golfo de Salamanca, Caribe colombiano OceanDocs
García, C.B.; Mendoza, N..
Some vital statistics of the population of Portunus spinicarpus inhabiting the Golfo de Salamanca, Colombian Caribbean, are presented for the first time. Condition factor was found stable the year round, Von Bertalanffy growth parameters were estimated as L∞=38.6 mm, K= 2.5 year-1, to= -0.0573 year. Natural mortality was estimated as 4.62 year-1. P. spinicarpus seem to prefer deep waters and sand-muddy bottoms.
Tipo: Journal Contribution Palavras-chave: Marine crustaceans; Population number; Mortality; Growth; Growth; Mortality; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 2006 URL: http://hdl.handle.net/1834/1984
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Cambios de la densidad de los cladóceros P. avirrostris y E. tergentina durante las épocas cálidas y frías (Dic. 2004 y nov. 2005) en la Bahía de Santa Elena (La Libertad - Ecuador) OceanDocs
Andrade, C..
El objetivo del presente estudio es determinar los cambios poblacionales durante las estaciones cálida y fría de este grupo taxonómico y del zooplancton acompañante más abundante en aguas de la Bahía de Santa Elena vs. las variables ambientales temperatura y salinidad.
Tipo: Journal Contribution Palavras-chave: Zooplankton; Seasonal variations; Coastal waters; Community composition; Population number; Zooplankton; Coastal waters; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_25205.
Ano: 2007 URL: http://hdl.handle.net/1834/2345
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Efectos directos e indirectos de la bioturbación producida por el cangrejo cavador Chasmagnathus granulata en ambientes estuariales OceanDocs
Botto, F..
Universidad Nacional de Mar del Plata, Facultad de Ciencias Exactas y Naturales (Argentina)
Tipo: Theses and Dissertations Palavras-chave: Bioturbation; Sediment analysis; Sediment transport; Comparative studies; Detritus; Population number.
Ano: 2001 URL: http://hdl.handle.net/1834/2956
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Evaluación hidroacústica del recurso jurel entre la V y X Regiones, año 2003 OceanDocs
Córdova, J.; Barbieri, M.A.; Espejo, M.; Núñez, S.; Ortiz, J.; Torres, P.; Bustos, L.; Véjar, F.; Catasti, V.; Valenzuela, V..
El presente informe contiene los resultados de la cuantificación de la biomasa por hidroacústica del jurel (Trachurus murphyi) en la zona centro-sur, la distribución e indicadores biológicos del jurel, las condiciones ambientales y las relaciones entre éstas y la distribución del recurso.
Tipo: Report Palavras-chave: Biomass; Population number; Echo surveys; Environmental conditions; Vertical distribution; Geographical distribution; Biomass; Geographical distribution; Environmental conditions; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_32980.
Ano: 2004 URL: http://hdl.handle.net/1834/1731
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Impact de l'érosion côtière et éléments d'étude de vulnérabilité : example du Togo (Golfe de Guinée) OceanDocs
Blivi, A.B..
La morphodynamique côtière permet d'analyser les séquences de plages réflexives et dissipatrices des côtes sablonneuses. Les ouvrages maritimes perturbent le mécanisme hydro-sédimentaire et déclenchent l'érosion côtière dont les impacts de recul sont généralement assez forts, notamment de 12 m/an sur le segment de 5 km de côte, à l'est du système d'infrastructures portuaires de Cotonou, au Bénin, et de 5 à 10 m/an sur environ 30 km de côte, au Togo. Cette caractérisation morphodynamique de plage, aussi bien à court qu'à long terme, est en réponse aux variations significatives du bilan sédimentaire dont les conséquences ' sont très importantes du fait de l'utilisation de l'espace pour des activités industrielles et urbaines très variées et de la forte...
Tipo: Journal Contribution Palavras-chave: COASTAL EROSION; Coastal zone; Growth; Population dynamics; Population number; Growth; Population dynamics; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_6111.
Ano: 2001 URL: http://hdl.handle.net/1834/1236
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La investigación de la ballena jorobada (Megaptera novaeangliae) alrededor de la isla de La Plata, Manabí, durante 1995 OceanDocs
Félix, F.; Haase, B..
Entre los meses de julio y septiembre de 1995 se realizaron 15 viajes a bordo de embarcaciones comerciales turísticas que hacen viajes entre Puerto López y la isla de La Plata para estudiar las ballenas jorobada. Un total de 102 ballenas en 45 grupos fueron observados en este período. Los grupos estuvieron formados por 1 a 5 individuos (X=2.26, DS=0.95). En 16 grupos se pudo establecer su composición por clases: 8 estuvieron compuestos solo por adultos (X=2.25, DS=0.82), 4 por adultos y subadultos (X=2.75, DS=0.82), 3 grupos por adultos y crías (2.33, DS= 0.47) y 1 por un subadulto solo. La tasa cruda de nacimientos fue de 0.029. Treinta y un individuos fueron identificados por el patrón de coloración en la parte ventral de la cola, aumentando así a 72 el...
Tipo: Journal Contribution Palavras-chave: Marine mammals; Population number; Stranding; Age groups; Age groups; Http://aims.fao.org/aos/agrovoc/c_28628.
Ano: 1998 URL: http://hdl.handle.net/1834/2287
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Microflores sulfatoreductrices en milieu subantarctique. Relations avec quelques parametres physicochimiques et biologiques. (Microflores totales et heterotrophes) ArchiMer
Delille, D; Bouvy, M.
The archipelago of Kerguelen with its complex fjord distribution is particularly interesting for the study of anoxic systems. Between 1968 and 1972, several stations were investigated fortnightly. One of these was further sampled weekly throughout 1982. Each sample series of sediment included the superficial aerobic and subsuperficial anaerobic levels. Each level was examined for direct epifluorescent counts, heterotrophic and sulfate-reducing bacterial numbers by M.P.N. methods, organic carbon and sulfide measurements. Sulfate-reducing bacteria seemed less related to total biomass than the heterotrophic microflora, the latter being dependent on organic supplies. The hydrogen sulfide production was directly related to the presence of sulfate reducers;...
Tipo: Text Palavras-chave: Anoxic conditions; Bacteria; Heterotrophic organisms; Sulphur; Organic carbon; Physicochemical properties; Seasonal variations; Population number; Microorganisms; Polar waters; Sulfate reduction.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-970.pdf
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Observations complementaires sur les causes possibles des anomalies de la reproduction de Crassostrea gigas (Thunberg) dans le bassin d'Arcachon. ArchiMer
His, Edouard; Maurer, Daniele; Robert, Rene.
The spat production in the Bay of Arcachon has been recently disturbed. Bioassays using algae used as food for oyster larvae have shown that the organotin paints affect or inhibit growth of Isochrysis galbana and Chaetoceros calcitrans . Fresh waters coming into the bay and shore sediment did not affect the growth of these algae. Bioassays proposed by Woelke (1967) using embryos and larvae of Crassostrea gigas have shown that the quality of the sea water from Arcachon harbour has been improved a few months after the use of organotin paints has been prohibited. Likewise fresh waters are free from any micropollutants that could drastically disturb the reproduction of C. gigas in the bay.
Tipo: Text Palavras-chave: Marine mollusks; Pollution effects; Recruitment; Population number; Oyster culture.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/publication-1788.pdf
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Premieres donnees sur la dynamique du peuplement macrobenthique des sables fins envases a Abra alba de la Baie de Seine orientale ArchiMer
Gentil, F; Irlinger, J; Elkaim, B; Proniewski, F.
The dynamics of macrobenthos populations living in muddy fine sands near Seine estuary have been studied, to obtain quantitative data for the knowledge of these populations and the impact of macrotidal environment disturbances.
Tipo: Text Palavras-chave: Seasonal variations; Population density; Population number; Ecosystem disturbance; Environmental effects; Population dynamics; Zoobenthos.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-1309.pdf
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Registros y abundancia relativa de mamíferos marinos durante el crucero oceanográfico insular B/I Orión (CO-II-2000) en las Islas Galápagos y sus alrededores OceanDocs
Alava, J.J..
En el presente trabajo se dan a conocer los resultados de las observaciones de campo de mamíferos marinos realizado en el segundo semestre del año 2000 en las Islas Galápagos y sus alrededores, durante un crucero oceanográfico del Instituto Oceanográfico de la Armada del Ecuador.
Tipo: Journal Contribution Palavras-chave: Marine mammals; Oceanographic stations; Cruises; Oceanic islands; Population number.
Ano: 2002 URL: http://hdl.handle.net/1834/2267
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Seasonal variation of microbial population from sediments of Vellar Estuary, South India. ArchiMer
Lakshmanaperumalsamy, P; Chandramohan, D; Natarajan, R.
A seasonal study on the occurrence and distribution of total aerobic microbial population (TMP), total aerobic heterotrophic bacteria (THB), actinomycetes and fungi in the sediments of Vellar Estuary, South India (11 degree 29'N 79 degree 46'E) was carried out during Jan. to Dec. 1975. Sediment samples were collected at monthly intervals, from 4 stations and analysed microbiologically. In general, bacterial population was found to be dominant followed by actinomycetes and fungi. The max peak for TMP, THB and fungi were recorded in Nov. in all stations. Monsoon season supported TMP, THB and fungi to a high level and it was summer for actinomycetes. Statistical analysis (Kendall's tau) showed a significantly positive correlation among TMP, THB, actinomycetes...
Tipo: Text Palavras-chave: Actinomycetes; Population number; Statistical analysis; Seasonal variations; Fungi; Bacteria; Sediment analysis; Microbiological analysis.
Ano: 1984 URL: http://archimer.ifremer.fr/doc/1984/acte-943.pdf
Registros recuperados: 11
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