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| Registros recuperados: 50 | |
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| Marchal, Paul; Ulrich, Clara; Pastoors, M. |
| The scope of this study is to investigate the extent to which area-based management may have influenced the fishing efficiency of the Danish and Dutch demersal fleets harvesting cod, plaice and sole in the North Sea. Special consideration is given to the 'plaice box', a restricted area where fishing is prohibited to towed-gear fleets of horsepower exceeding 300 hp. An index of fishing power is calculated as the log-ratio between the catch per unit effort (CPUE) of any vessel and some survey abundance index. Annual trends in fishing are calculated as the year-effect derived from a general linear model (GLM) analysis of the index of fishing power. The fishing efficiency of Danish gill-netters and, to some extent, Danish seiners, has overall increased inside... |
| Tipo: Text |
Palavras-chave: Fishing efficiency; Plaice box; Fisheries management; North Sea; Demersal fisheries. |
| Ano: 2002 |
URL: https://archimer.ifremer.fr/doc/00589/70118/68112.pdf |
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| Inejih, C.A.O.. |
| Résumé : Le présent article donne une description de l’évolution des paramètres descripteurs de la pêcherie de céphalopodes. Il utilise les statistiques de pêche du CNROP. Les paramètres décrits sont l’effort (nombre de licences, caractéristiques physiques des bateaux, jours de pêche), les captures et les prises par unité d’effort. Les débarquements totaux ont enregistré une hausse atteignant 42000 tonnes en 1992. Cette hausse est due à celle des rendements importants observés pour le poulpe ; ceux des poissons ont diminué continuellement depuis 1990, notamment chez les glaciers. L’effort, en jour de pêche, a enregistré une baisse progressive pour les congélateurs. Par contre, il a presque doublé de 1990 à 1991 chez les glaciers. Les deux modes de... |
| Tipo: Journal Contribution |
Palavras-chave: Demersal fisheries; Fishing effort; Cephalopod fisheries; Octopus fisheries. |
| Ano: 1996 |
URL: http://hdl.handle.net/1834/239 |
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| Inejih, C.A.O.. |
| Résumé : Une analyse globale des données biologiques collectées au cours des campagnes d’évaluation des stocks du plateau continental mauritanien effectuées par des navires de recherches (septembre 1987 à septembre 1988) a été réalisée pour les seiches. Les espèces de seiches les plus dominantes étaient Sepia officinalis et Sepia bertheloti. Pour ces deux espèces des relations biométriques ont été définies. Les données disponibles ont permis l’étude de la reproduction et de la distribution spatio-temporelle de Sepia officinalis. Les résultats obtenus dans cet article méritent une confirmation par une étude basée sur des données plus fines et plus complètes. # |
| Tipo: Journal Contribution |
Palavras-chave: Cuttlefish fisheries; Fishery surveys; Demersal fisheries; Biometry; Http://aims.fao.org/aos/agrovoc/c_927. |
| Ano: 1990 |
URL: http://hdl.handle.net/1834/811 |
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| Institut de Recherche pour le Développement, Paris (France); Fall, Massal. |
| Français - Les traits essentiels de la côte sénégalaise, repères historiques de la pêche, communautés de pêcheurs, caractéristiques des flottes et modes d’accès à la ressource et d’interaction sont analysés. Les caractéristiques, tendances décroissantes de l’abondance,niveaux d’exploitation, mesures d’aménagement, relations interspécifiques, changements potentiels et sources de variation des stocks démersaux côtiers sont précisés. Les notions de tactiques et stratégies de pêche sont passées en revue, conceptualisées puis étudiées.Le modèle «Dynamique Conjointe Exploitation Ressource» utilisé repose sur la définition de 4 typologies. L’utilisation de méthodes de classification et de connaissances d’experts conduit à considérer 32 stocks, 31 strates, 82... |
| Tipo: Theses and Dissertations |
Palavras-chave: Fisheries; Demersal fisheries; Modelling; Stocks; Ecosystems; Community fishing; Inland waters; Marine water; Hydrologic cycle; Fishermen; Fishing fleet; Shrimp fisheries; Capture fisheries; Fisheries management; Trawling; Artisanal fishing; Fishing licenses. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/5004 |
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| Maeda, H.; Ercoli, R.; Fukada, K.; Garcia, J.C.. |
| Bathymetric changes in groundfish catch composition are analyzed, on the basis of routine reports of 106 bottom longline strings. The project was conducted from 12 December 1986 to 29 November 1987, covering areas from coastal waters to the outer shelf of the continental shelf off Argentina from 36° to 55°S. As a preliminary step to the analysis, the validity of each factor as probable explanatory variable in each area, was analyzed with consideration as to their range and variation. Obtained results show that the kingclip (Genypterus blacodes), a main objective of the project, could become one of the most profitable target species of the high-sea bottom longline, in areas along the outer edge of the continental shelf, at bottom depths slightly below 200... |
| Tipo: Journal Contribution |
Palavras-chave: Longlining; Experimental fishing; Demersal fisheries; Demersal fisheries; Http://aims.fao.org/aos/agrovoc/c_2173. |
| Ano: 1994 |
URL: http://hdl.handle.net/1834/1930 |
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| Gorini, F.L.; Di Marco, E.; Wöhler, O.C.. |
| Fishery statistics of austral demersal fishes in the Southwest Atlantic (1980-2002 period). A synthesis of the information available about catches of austral demersal fishes and fishing efforts reported by different fleets that operated in the SW Atlantic between 34° S-58° S in the 1980-2002 period is made. Species included in the analysis were southern blue whiting (Micromesistius australis), patagonian hoki (Macruronus magellanicus), patagonian toothfish (Dissostichus eleginoides), red cod (Salilota australis), southern hake (Merluccius australis) and ling (Genypterus blacodes). Annual and monthly catches, fishing grounds, number of vessels that participated in the fisheries, main landing ports and other characteristic of interest are presented. When it... |
| Tipo: Journal Contribution |
Palavras-chave: Demersal fisheries; Landing statistics; Catch statistics; Fishing effort; Demersal fisheries; Fishing effort; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_24027. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/2559 |
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| Girardin, M.. |
| Résumé : Les 6 campagnes de chalutage réalisées en 1987 et 1988 ont permis d’évaluer les indices d’abondance des diverses ressources démersales, essentiellement poisson et céphalopodes, par strate, zone et, pour l’ensemble du plateau continental. Des estimations de biomasse apparente (77'000 tonnes en 1988) et de potentiel maximum exploitable (59'200 t. en 1988) ont aussi été avancées. La comparaison de ces résultats avec ceux des années 1982-1984 a fait ressortir une nette tendance à l’amélioration générale depuis 1987. Si la situation de la zone nord (Cap Blanc) demeure encore préoccupante par rapport à celle du sud, l’abondance globale des ressources du plateau a retrouvé un niveau peu inférieur à celui des années 1982-1983. L’influence probable de... |
| Tipo: Journal Contribution |
Palavras-chave: Demersal fisheries; Stock assessment; Trawling. |
| Ano: 1990 |
URL: http://hdl.handle.net/1834/807 |
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| Koranteng, K.A.. |
| Between 1963 and 1990, the abundance of demersal fishery resources in Ghana’s shelf waters underwent significant changes whereby the relative importance of major species changed in every trawl survey conducted in the area. Triggerfish (Balistes capriscus) dominated this ecosystem for nearly twenty years (from early 1970s to late 1980s) displacing bigeye grunt (Brachydeuterus auritus) as the most abundant species.The density of all demersal species (excluding triggerfish) assessed in bottom trawl surveys decreased from 50 kg ha-1 in 1963-64 to 32.4 kg ha-1 in 1990. The lowest density of 22.5 kg ha-1 occurred between 1973 and 1977. Density of triggerfish was high between 1973 and 1982, reaching a value of 28 kg ha-1 between depths of 30 and 50 m. Its... |
| Tipo: Journal Contribution |
Palavras-chave: Demersal fisheries; Trawls; Fishery surveys. |
| Ano: 2001 |
URL: http://hdl.handle.net/1834/241 |
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| Tascheri, R.; Pequeño, G. |
| El orange roughy (Hoplostesthus atlanticus, Collet 1889), es una especie de aguas profundas de un alto valor comercial, que presenta una amplia distribucion geografica en los oceanos atlantico, Indico y Pacifico. Los estudios de edad de Orange roughy muestra que es una especie de crecimiento lento que alcanzaria sobre los 100 años de edad. La actividad pesquera en torno a este recurso, de reciente desarrollo en Chile, ha permitido la recolección de muestras de la fauna ictica asociada a esta pesqueríia que reviste especial especial interés cientifico, en áreas como la zoologia y biogeografia , estudios que unidos a datos geologicos pueden contribuir a responder importantes interrogantes como la distribucion de orange roughy en areas geograficas tan... |
| Tipo: Book |
Palavras-chave: Fauna; Demersal fisheries; Fish physiology; Fauna; Demersal fisheries; Http://aims.fao.org/aos/agrovoc/c_2821; Http://aims.fao.org/aos/agrovoc/c_2173. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/1401 |
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| Gasceul, D.; Laurans, M.; Sidibe, A.; Barry, M.D.. |
| This communication presents a synthesis of the work undertaken within the framework of the FIAS project, by the “Single-species Analysis” module. This work focuses on statistical analyses of commercial fishing and the data from scientific trawling surveys, in order to deduce the current state of exploited stocks and to better understand the ecosystems of the sub-region. This relates to the analyses of about 20 stocks, distributed in the waters of the various countries and covering a broad range of ecological characteristics. Three approaches were used: (1) analyses of a time series of estimates of abundance indices obtained from GLM-type methods applied to survey or commercial data; analysis of a time series of catches and catches per unit of effort used... |
| Tipo: Conference Material |
Palavras-chave: Demersal fisheries; Stock assessment. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/689 |
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| Roa-Varón, A.; Saavedra-Díaz, L.M.; Acero-P., A.; Mejía-M., L.S.; Navas-S., G.R.. |
| Between October and August 1999 five cruises were made on board of R/V Ancón, across the Colombian Caribbean slope, from Punta Estrella (Guajira), near the Venezuelan border, to Cabo Tiburón (Chocó), near the Panamá border. Eighty trawls were made between 200 and 500 m depth with a semi-balloon net. Twelve new records of fishes for the Colombian Caribbean in the orders Beryciformes, Zeiformes, Perciformes and Tetraodontiformes were collected. Plectranthias garrupellus (Serranidae), Benthodesmus tenuis and B. simonyi (Trichiuridae) are new records for the Caribbean; Diplospinnus multistriatus family (Gempylidae) is a new record for the southern Caribbean. |
| Tipo: Journal Contribution |
Palavras-chave: Demersal fisheries; New records; Surface slope; Demersal fisheries; Http://aims.fao.org/aos/agrovoc/c_2173. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/3065 |
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| Registros recuperados: 50 | |
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