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Registros recuperados: 66
Primeira ... 1234 ... Última
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A transboundary study of the pelagic fish stocks of southern OceanDocs
Krakstad, Jens-Otto; Amaro, Aristóteles P. da S.; Shigwedha, Vaino.
The main objectives of the survey were the following: • To map the distribution and estimate the abundance of the most commercially important pelagic species in the Namibia-Angola transboundary area (15°50-19°00’), following the survey design utilized in Angolan waters (6 n.mi spacing between transect lines), with special emphasis on the two horse mackerel Cunene horse mackerel (Trachurus trecae) and Cape horse mackerel (Trachurus capensis), sardine “Pilchard” (Sardinops sagax) and other small pelagic species, including anchovy (Engraulis capensis) and round herring (Etrumeus whiteheadi). • To map the distributions and estimate the abundance of the same species in central Namibia south to Dune Point (20°15’ S), following the established survey design with...
Tipo: Report Palavras-chave: Pelagic fisheries; Fishery surveys; Acoustics; Sampling; Trawls; Oceanography; Biomass; Distribution; Composition.
Ano: 2012 URL: http://hdl.handle.net/1834/5230
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Abondance relative et estimation de la biomasse des petits pélagiques des eaux tunisiennes OceanDocs
Ben Abdallah, L.; Hattour, A.; Guennegan, Y..
Deux campagnes de prospection sur les petits pélagiques s'inscrivant dans le cadre du Programme National Mobilisateur (PNM), "Evaluation de ressources pélagiques et démersales des eaux tunisiennes" (1996-1999) ont été menée en étroite collaboration avec l’Institut Français de Recherche et d’Exploitation de la Mer (IFREMER). Ces campagnes ont pour objectifs de préciser l'abondance relative des petits pélagiques et leur variabilité spatiaux-temporelles mais également de quantifier les potentiels exploitables des stocks des animaux aquatiques préalablement définis, et surtout de familiariser l’équipe des scientifiques tunisiens, aux méthodes numériques et informatiques utilisées en participant à la lecture des échogrammes et aux traitements des données des...
Tipo: Journal Contribution Palavras-chave: Abundance; Biomass; Pelagic fisheries; Potential yield; Stock assessment; Biomass; Stock assessment; Pelagic fisheries; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_5659.
Ano: 2004 URL: http://hdl.handle.net/1834/1163
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Abondonce relative et estimation de la biomasse des petits pelagiques des eaux tunisiennes OceanDocs
Hattour, A.; Ben Abdallah, L.; Guennegan, Y..
Within the frame of the National Program (PNM), 'Assessment of Marine Tunisian Resources' (1996-1999), two prospecting surveys on small pelagic fishes, have been led in narrow collaboration with French Institute IFREMER. Their objectives were to specify the relative fishes abundance, their spatial-temporal variability but also to quantify the maximum sustainable yield (MSY) of this resource. A third important goal was to familiarize a Tunisian scientist team, with numerical methods and data processing used during the cruises (reading of echograms, treatments of data, etc.) in stocks assessment. It is known that the indirect stocks assessment methods of small pelagic species is not reliable, reason for which we opted to apply echo - integration techniques....
Tipo: Journal Contribution Palavras-chave: Abundance; Biomass; Fishery surveys; Pelagic fisheries; Potential yield; Stock assessment; Biomass; Stock assessment; Pelagic fisheries; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_5659.
Ano: 2004 URL: http://hdl.handle.net/1834/4237
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Adaptation et essai d’un chalut pélagique a très grandes mailles a quatre faces egales pour une puissance de 650 c.v. OceanDocs
Bdioui, M.; M'Rabet, R..
Le présent travail concerne l’adaptation et l’essai d’un chalut pélagique japonais de très grandes mailles et à quatre faces égales dans les pêcheries tunisiennes. Le fil élémentaire composant les alèzes de filets est en Dyneema. Les essais de ce modèle de chalut, conçu pour un bateau d’une puissance motrice de 650 C.V, ont montré qu’il est adapté aux pêcheries de la région nord de la Tunisie et qu’il est efficace pour la capture des petits poissons pélagiques de grande profondeur notamment la sardine et l’anchois. Par ailleurs, les rendements de ce modèle de chalut sont importants grâce à ses ouvertures, horizontale et verticale, d’environ 35mètres. Les captures sont composées à plus de 99% d’espèces pélagiques.
Tipo: Journal Contribution Palavras-chave: Trawl nets; Gear research; Marine fisheries; Mesh selectivity; Pelagic fisheries; Trawlers; Pelagic fisheries.
Ano: 2009 URL: http://hdl.handle.net/1834/4489
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Características oceanográficas frente a Ecuador durante septiembre de 1995 OceanDocs
Cuadra, T. de la.
One hundred oceanographic stations were occupied in front of Ecuador during september 1995. All the information were treated statically using the method of ”Kriging” to interpolate from this; surface distributions of sea temperature, sea temperature anomalies, air temperature, and atmospheric presion were obtained. These distribution with temperature and salinity profiles showed between normal and cold climatical conditions. Comparing the sea density horizontal distribution and the water mass, with the capture areas distributions of Sardinops sagax, resulted that areas with hight capture had AESS in low quantity and hand too a surface thermocline.
Tipo: Journal Contribution Palavras-chave: Oceanographic data; Temperature (air-sea); Temperature anomalies; Salinity data; Pelagic fisheries; Pelagic fisheries; Http://aims.fao.org/aos/agrovoc/c_5659.
Ano: 1996 URL: http://hdl.handle.net/1834/2964
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Climate and pelagic fisheries in the Canary and Guinea currents 1964-1993: The role of trade winds and the southern oscillation ArchiMer
Binet, D.
Upwellings off the coasts of western Africa provide abundant but fluctuating marine resources. Sea surface temperature and wind stress, monitored by the ship-of-opportunity observation network, are compared to fishery statistics from 1964 onwards. In the Canary Current, off Sahara and Mauritania, upwellings are mostly wind driven. In the Guinea Current, off Cote d'Ivoire and Ghana, the link with local wind is very weak. In the southern Canary Current, two wind-intensification periods occurred in the early 1970s and from 1986 onwards. On each occasion, Sardina pilchardus landings were multiplied approximately threefold. During the first event, catches of species living at the periphery of the upwelling, Sardinella, Trachurus, Decapterus and Scomber,...
Tipo: Text Palavras-chave: Pelagic fisheries; West Africa; Trade winds; Oceanic currents; Southern Oscillation.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/00093/20390/18057.pdf
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Comportamiento de las capturas de peces pelágicos pequeños en relación con la temperatura durante el 2004 OceanDocs
Cuadra, T. de la.
Aplicando Funciones Ortogonales Empíricas (EOF) se determinó patrones de comportamiento similares entre algunas variables pesqueras del 2004 como: los desembarques de pelágicos pequeños, número de zarpes de los barcos clase I, II, III y IV; y variables oceanográficas como la temperatura superficial del mar (TSM) y anomalías térmicas de la región Nino 1+2. También se calculo los coeficientes de correlación de Pearson (r), nivel de significancia, y porcentaje de correlación explicada de cada una de las relaciones encontradas. Algunas fueron las especies que realmente mostraron patrones comunes con los parámetros oceanográficos. De todas ellas la sardina redonda fue la especie mayormente asociada a la TSM por su patrón común, nivel de significancia, y...
Tipo: Journal Contribution Palavras-chave: Catch composition; Pelagic fisheries; Temperature anomalies; El Nino phenomena; Landing statistics.
Ano: 2010 URL: http://hdl.handle.net/1834/4801
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Composición por tallas y edades de las capturas comerciales de anchoíta bonaerense obtenidas entre 1990 y 2011 OceanDocs
Hansen, J.E.; Garciarena, A.D..
As part of the research programs performed yearly at the Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP, Mar del Plata, Argentina) some important basic data about the commercial fisheries usually included in internal reports are registered. This formal paper is a review and summary of size and age composition estimates of commercial catches (discards included) of Northern Argentine anchovy (34ºS-41ºS) obtained between 1990-2011. The basic data resulting from the examination of 521 samples from fishing vessels included 62,466 fish length measurements and 26,667 valid age readings from which the corresponding 22 annual age-length keys were built. The annual estimates of the individual total length-total weight relation parameters and of...
Tipo: Journal Contribution Palavras-chave: Pelagic fisheries; Stock assessment; Commercial fishing; Catch composition; Age composition; Size distribution; Clupeoid fisheries.
Ano: 2013 URL: http://hdl.handle.net/1834/5502
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Conseil Présidentil sur la Pêche OceanDocs
Tipo: Book Palavras-chave: Artisanal fishing; Coastal fisheries; Fish catch statistics; Fishermen; Fishery management; Fishery development; Fishery oceanography; Fishing effort; Fishery protection; Fishery statistics; Freshwater fish; Marine fisheries; Pelagic fisheries; Aquaculture statistics; Aquaculture; Aquaculture development; Fishermen; Fishery management; Fishery oceanography; Marine fisheries; Aquaculture; Coastal fisheries; Fishing effort; Pelagic fisheries; Http://aims.fao.org/aos/agrovoc/c_2936; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_2938; Http://aims.fao.org/aos/agrovoc/c_4611; Http://aims.fao.org/aos/agrovoc/c_550; Http://aims.fao.org/aos/agrovoc/c_1696; Http://aims.fao.org/aos/agrovoc/c_24027; Http://aims.fao.org/aos/agrovoc/c_5659.
Ano: 2008 URL: http://hdl.handle.net/1834/2892
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Deplacements du centre de gravite des captures de sardinelles et de l'effort de peche des flottilles industrielles pelagiques dans la zone economique exclusive mauritanienne de 1991 a 1999 OceanDocs
Ould Taleb Ould Sidi, M.M..
L'analyse du centre de gravité des captures des sardinelles et de l'effort de pêche nominal met en évidence les déplacements incessants des flottilles de la Russie, de l'Ukraine et des Pays Bas en activité dans la ZEE mauritanienne en particulier pour la période 1996 à 1999 qui est la période de présence commune de ces différentes flottilles. On démontre ainsi la grande mobilité de ces flottilles dans le sens côte-large et large-côte dans un même secteur en plus du traditionnel déplacement latitudinal pour suivre la migration des espèces cibles.
Tipo: Journal Contribution Palavras-chave: Effort de pêche nominal; Catch of sardinellas; Nominal fishing effort; ZEE mauritanienne; Centre de gravité; Mauritanian Economic Exclusive Zone; Capture des sardinelles; Gravity center; Fishery industry; Pelagic fisheries; Sardinella fisheries.
Ano: 2002 URL: http://hdl.handle.net/1834/215
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Description de l'activité des flottilles pélagiques industrielles en 1987 dans la ZEE mauritanienne. OceanDocs
Chavance, P..
En 1987, 59 chalutiers pélagiques (62-102 m, 2000 – 3880 cv) ont opéré dans la ZEE mauritanienne. Trois pays sont représentés : l’URSS, la Roumanie et l’Allemagne de l’Est. Les captures totales atteignent 441473 tonnes dont 66,5% est pêchée par les soviétiques, 26,3% par les roumains et 7,2% par les allemands de l’Est. Les chinchards (<Trachirus sp et Decapterus rhonchus>) prédominent dans les captures avec 50,8%, les sardinelles en représentent 14,9% et la sardine 7,7%. L’activité des flottilles est apparue, comme en 1986, très marquée par les saisons hydrologiques.
Tipo: Journal Contribution Palavras-chave: Chalutiers pélagiques; Flottilles industrielles; Captures; Saisons hydrologiques; Commercial fishing; Environmental impact; Fishing effort; Fishing fleet; Pelagic fisheries; Seasonal distribution; Seasonal variations; Temperature effects; Temporal variations; Trawling; Upwelling; Environmental impact; Trawling; Fishing effort; Pelagic fisheries.
Ano: 1988 URL: http://hdl.handle.net/1834/1147
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Description de l'activité des flottilles pélagiques industrielles en 1988 dans la ZEE mauritanienne OceanDocs
Chavance, P..
Résumé : En 1988, 63 chalutiers pélagiques (55-102m, 2000-3880cv) ont opéré dans la ZEE mauritanienne ainsi qu’un senneur de 55m et 3600 cv. La Mauritanie, et quatre nationalités étrangères sont représentées : le Ghana, la République démocratique allemande, la Roumanie et l’URSS. La capture totale etteint 400800 tonnes dont 69,3% est pêchée par les soviétiques, 29,9% par les roumains, 0,6% par les allemands de l’est et 0,2% par la flottille nationale. Les espèces principales sont les chinchards qui prédominent dans les captures avec 53,2%, la sardine (13,2%), les sardinelles (10,7%), le maquereau (7,5%) et le sabre (6,4%). L’activité des flottilles est parue, comme les années précédentes, très marquée par les saisons hydrologiques. #
Tipo: Journal Contribution Palavras-chave: Pelagic fisheries; Fishing fleet.
Ano: 1990 URL: http://hdl.handle.net/1834/822
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Déscription de l'activité ds flotilles pélagiques industrielles en 1986 dans la ZEEM mauritanienne OceanDocs
Chavance, P.; Josse, P.; Damiano, A.; Lawal, D..
Tipo: Journal Contribution Palavras-chave: Industrial fish; Fish products; Fishing industry; Fishing fleet; Fisheries; Pelagic fisheries.
Ano: 1988 URL: http://hdl.handle.net/1834/4770
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Desembarques de la pesca artesanal de peces pelágicos grandes y tiburones en la costa ecuatoriana durante el 2008 OceanDocs
Peralta, M..
Se presentan los resultados del seguimiento de los desembarques de peces pelágicos grandes y tiburones procedentes de la pesca artesanal durante el 2008. Se determinó un total desembarcado de 32 150.37 t, que correspondió 67.4 % y 20.2% a peces pelágicos grandes y tiburones respectivamente. Entre los pelágicos grandes la familia Coryphaenidae fue la más representativa, en tanto que para el grupo de tiburones fue Alopiidae, y en menor presencia Carcharhinidae y Sphyrnidae. En los puertos de Manta, Anconcito y Santa Rosa se registraron los mayores desembarques de pelágicos grandes mayormente de la familia Coryphaenidae en tanto que para los tiburones los aportes más significativos están reportados para el puerto de Manta. Las capturas de dorado estuvieron...
Tipo: Journal Contribution Palavras-chave: Pelagic fisheries; Landing statistics; Artisanal fishing; Shark fisheries.
Ano: 2009 URL: http://hdl.handle.net/1834/4781
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Determinisme du comportement associatif des poissons pelagiques: les hypotheses a l'epreuve des faits ArchiMer
Freon, Pierre; Dagorn, Loeiz.
No abstract.
Tipo: Text Palavras-chave: Attracting techniques; Behaviour; Ecological associations; Pelagic fisheries.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00042/15322/12661.pdf
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Distribución, evaluación acustica y estructura poblacional de la anchoíta. Resultados de las campañas del año 1993 OceanDocs
Hansen, J.E.; Madirolas, A..
Two pelagic surveys to study were carried out during 1993. Those surveys covered the regions inhabited by either the bonaerensis stock in october (34-41°S)and the patagonian stock in November - December (41-45°30'S). Pre-stratified random sampling designs, including two random steps to allocate the transects, were adopted to perform the acoustic sampling by echo integration. A midwater trawl net (9-16 m vertical opening, 10 mm mesh-sized codend)was used to collect fish samples. The biomass of the northern stock was acoustically estimated to be about 1,45 million tons, whereas that of the southern stock was almost 740,000 t. Young anchovies, up to two-year old, allow for most of theose abundance values within each stock. The arrays of individuals at the sea...
Tipo: Journal Contribution Palavras-chave: Pelagic fisheries; Geographical distribution; Biomass; Mortality; Echo surveys; Stock assessment; Geographical distribution; Biomass; Stock assessment; Pelagic fisheries; Mortality; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_5659; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1996 URL: http://hdl.handle.net/1834/1955
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Do FADs influence the geographical distribution of dolphinfish (Coryphaena hippurus)? ArchiMer
Taquet, Marc; Reynal, Lionel; Laurans, Martial.
For most fisheries, increasing the local production of pelagic fish is the main objective of Fish Aggregating Devices (fads). This does not rule out the existence of a larger-scale impact, especially on the migratory behaviour of fish. The analysis of data collected during 25 experimental fishing surveys around Martinique between 1995 and 1997 has led to the hypothesis that fads influence the migratory behaviour of young dolphinfish. Unlike recent studies of dolphinfish migration in the Caribbean, which tend to show an annual migration pattern with a seasonal passage through the French West Indies, the experimental fishing surveys done over more than a year on a monthly basis on a single cohort, show that the migratory pattern of part of the regional stock...
Tipo: Text Palavras-chave: Attracting techniques; Geographical distribution; Migrations; Migratory species; Pelagic fisheries; Tuna fisheries; Coryphaena hippurus.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/00042/15321/12635.pdf
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El recurso Jurel (Trachurus murphyi) en aguas ecuatorianas OceanDocs
Aguilar, F..
El Jurel, especie pelágica de la familia Carangidae, se distribuye en el Pacífico Suroriental principalmente a lo largo de las costas de Perú y Chile entre los 01~'35'N a 55~'S (Chirichigno et al., 1982). Durante el período de 1984-1990 las capturas fueron ocasionales, de poca importancia, reportadas generalmente entre los meses de septiembre-octubre y obtenidas en el extremo sur del Golfo de Guayaquil. En 1991, los resultados del sistema de monitoreo de los puertos pesqueros industriales reportó pequeñas capturas del recurso en enero, las que volvieron a ocurrir a partir del mes de mayo, pero en niveles muy superiores. En 1991 las capturas de Jurel estuvieron comprendidas entre las 64943,8 (mayo) y 74,9 T (diciembre). Durante los meses de mayo, julio y...
Tipo: Journal Contribution Palavras-chave: Biological data; Pelagic fisheries; Fishing effort; Fishery resources; Pelagic fisheries; Fishing effort; Fishery resources; Http://aims.fao.org/aos/agrovoc/c_5659; Http://aims.fao.org/aos/agrovoc/c_24027; Http://aims.fao.org/aos/agrovoc/c_2942.
Ano: 1993 URL: http://hdl.handle.net/1834/3073
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El zooplancton del hábitat reproductivo de la población bonaerense de anchoíta (Engraulis anchoita), con especial énfasis en crustáceos OceanDocs
Viñas, M.D.; Marrari, M.; Di Mauro, R.; Cepeda, G.D.; Padovani, L.N..
The information gathered in Argentine anchovy (Engraulis anchoita) Northern population assessment cruises allowed to perform studies on the zooplankton community of the Buenos Aires shelf since 1995. In this work the most relevant results as regards the taxonomy and size structure of the community, faunistic areas, and 'key' species in relation to the hydrographic conditions and frontal systems of the region are presented. Besides, the consequences those results might have on Argentine anchovy trophic ecology are analyzed. The taxonomic groups studied included copepods, cladocerans, appendicularians, chaetognaths, amphipods, and euphausiids. The multivariate analysis applied to quantitative data allowed to clearly distinguish three faunistic areas with...
Tipo: Journal Contribution Palavras-chave: Zooplankton; Biogeography; Fauna; Fronts; Trophic relationships; Abundance; Pelagic fisheries.
Ano: 2013 URL: http://hdl.handle.net/1834/5497
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Etude sur le savoir écologique des pêcheurs artisans des petits pélagiques en Afrique du Nord-Ouest OceanDocs
Sall, A..
Agriculture, Nature and Food Quality, Den Haag (Netherlands); Ministerie Van Buitenlandse Zaken, Brussel (Belgium); Wageningen International, Wageningen (Netherlands)
Tipo: Report Palavras-chave: Fisheries; Artisanal fishing; Fishermen; Fishing effort; Canoe fisheries; Coastal zone; Fishery engineering; Protected resources; Pelagic fisheries; Cycles; Sexual reproduction; Multispecies fisheries; Stocks; Ocean currents; Winds; Biomass; Upwelling; Ecosystems; Maritime legislation; Size; Biomass; Ecosystems; Fisheries; Fishermen; Stocks; Ocean currents; Winds; Size; Fishing effort; Pelagic fisheries; Sexual reproduction; Multispecies fisheries; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2482; Http://aims.fao.org/aos/agrovoc/c_2934; Http://aims.fao.org/aos/agrovoc/c_2936; Http://aims.fao.org/aos/agrovoc/c_28772; Http://aims.fao.org/aos/agrovoc/c_12883; Http://aims.fao.org/aos/agrovoc/c_8401; Http://aims.fao.org/aos/agrovoc/c_7093; Http://aims.fao.org/aos/agrovoc/c_24027; Http://aims.fao.org/aos/agrovoc/c_5659; Http://aims.fao.org/aos/agrovoc/c_26876; Http://aims.fao.org/aos/agrovoc/c_4987.
Ano: 2009 URL: http://hdl.handle.net/1834/3671
Registros recuperados: 66
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