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A mothership dory fishing operation in Seychelles: results of the first voyage of the locally owned vessel Pecheur Breton, March - May 1991 OceanDocs
Mees, C. C..
A Mother ship dory fishing operation was conducted in Seychelles waters by the vessel Pecheur Breton and 11 catcher boats during 1991. This venture was carried out over a 72 day period from 2nd March 1991 to 14 May 1991 and 246 tonnes of fish were caught.
Tipo: Report Palavras-chave: Demersal fisheries; Fishing operations; Mother ships; Catch/effort.
Ano: 1991 URL: http://hdl.handle.net/1834/5122
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Análisis de la estratificación empleada en campañas de evaluación de recursos demersales costeros en la Zona Común de Pesca Argentino-Uruguaya y en El Rincón, 1994 OceanDocs
Perrotta, R.G.; Lasta, C.A.; Aubone, A..
The data belong to the demersal fishery research cruise H-13/94. Stratification used for research surveys from the catches values was tested, both for the northern area, Argentine-Uruguayan Common Fishing Zone (AUCFZ) located between 34° and 39°S, and the southern area situated between 38°30' and 41°30'S (El Rincón, Buenos Aires Prov., Argentina). The variables considered were: croaker and striped weak fish densities and depth. Discriminant factor analysis indicates the formation of two and six strata for the southern and northern areas respectively. The adequate confidential limits of the estimated biomass for each strata obtained for different species, indicate that the criteria for stratification is satisfactory. The number of catches by strata was...
Tipo: Journal Contribution Palavras-chave: Fishery surveys; Coastal fisheries; Demersal fisheries; Statistical sampling; Variance analysis; Surveys; Demersal fisheries; Coastal fisheries; Surveys; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_1696; Http://aims.fao.org/aos/agrovoc/c_7537.
Ano: 1998 URL: http://hdl.handle.net/1834/2470
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Análisis secuencial de la población de polaca (Micromesistius australis) en el período 1987-1997 ajustado con valores de rendimiento por unidad de esfuerzo de pesqueros comerciales. OceanDocs
Wöhler, O.C.; Cordo, H.D.; Hansen, J.E.; Cassia, M.C..
The current status of southern blue whiting Micromesistius australis stock is described. A single, closed fish population is assumed to inhabit the SW Atlantic. Based on catch data corresponding to years 1987-1997, a sequential analysis on the stock is carried out (Cohort Analysis). Under an adaptative framework, catch per unit of effort data from commercial vessels are used to fit the model. Two commercial fleets are used in the fitting, i.e. Polish vessels (1987-1994)and Argentine surimi factory vessels (1991-1997). Results indicate that both, total stock biomass and spawning stock biomass would have declined. Total biomass would have decreased from a maximum close to 1.4 million tons in 1990 down to 0.5 mt in 1997 whereas the current spawning stock...
Tipo: Journal Contribution Palavras-chave: Stock assessment; Fishery management; Catch/effort; Recruitment; Biomass; Demersal fisheries; Demersal fisheries; Stock assessment; Fishery management; Biomass; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_926.
Ano: 2001 URL: http://hdl.handle.net/1834/1867
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Area-based management and fishing efficiency ArchiMer
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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Áreas de distribución y abundancia de los recursos demersales en la plataforma continental del Golfo de Guayaquil OceanDocs
Revelo, W..
In the Dermersal Fishing period of the Cruise T94/11/05 D-O (15/11/94-23/11/94) an area of 12,520.9 km2 was covered, that is. The Ecuadorean Shelf between the 02°10'0”S - 80°0'0”W and 14 to 115 meters deep throughout th Ecuadorean Continental Shelf of the Guayaquil Gulf area. A total of 78 species was identified as follows: 74 of this 95%, two of crustaceans, one of molluscan and one of holothurid (Sea cucumber). The estimated total biomass of demersal fish was of 78, 384.9 t, from which the 52% was concentrated between the 02°48'9”S and 03°15'8”S. The most abundant species were: Gallineta (Prionotus stephanophrys)(48,776.0 t), Corvina (Cynoscion spp.) (11,241.7 t), Barriga juma (Larimus spp) (4,111.8 t), Cabezudo (Caulolatilus spp) (2,554.2 t) and Torno...
Tipo: Journal Contribution Palavras-chave: Geographical distribution; Demersal fisheries; Fishery resources; Geographical distribution; Demersal fisheries; Fishery resources; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_2942.
Ano: 1993 URL: http://hdl.handle.net/1834/3076
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Areas ícticas costeras en la Zona Común de Pesca Argentino-Uruguaya (ZCPAU) y en el litoral de la Provincia de Buenos Aires, 1994 OceanDocs
Lasta, C.A.; Bremec, C.; Mianzan, H.W..
Demersal fisheries evaluation data obtained during the cruise H-13/94, in the areas of El Rincón (Buenos Aires Prov., Argentina) and the Argentine-Uruguayan Common Fishing Zone, are analyzed. Species distribution areas are defined through cluster analysis among stations (Q mode), using Bray-Curtis index applied to species abundance data: number of individuals/mn2 and t/mn2. Regarding coastal resources are dynamic and opportunistic, information.
Tipo: Journal Contribution Palavras-chave: Demersal fisheries; Coastal fisheries; Marine fish; Ecological distribution; Demersal fisheries; Coastal fisheries; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_1696.
Ano: 1998 URL: http://hdl.handle.net/1834/2467
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Caracterización ecológica de las asociaciones de peces demersales del Caribe colombiano Norte, con énfasis en los pargros (Lutjanidae) OceanDocs
Manjarrés, L.; García, C.; Acero-P., A..
The mean objetives ofthe present study were to establish the existence of demersal fish associations in the shelf and superior slope of the Colombian Caribbean northern zone and determine if the biotical patterns determineted by these associations are correlationed with the patterns structured by the environmental conditions evaluated. Data were taken from three demersal resources assessment surveys of the INPA-VECEP/UE Program, carried out during the period 1995-1996. The station groups were not consistent in terms of species composition along the different periods. The dominant characteristics of demersal species associations was the absence of temporal persistence. Only it was possible to find some partial associations which remain during a maximum...
Tipo: Journal Contribution Palavras-chave: Demersal fisheries; Ecology; Demersal fisheries; Ecology; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_2467.
Ano: 2001 URL: http://hdl.handle.net/1834/3181
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Catálogo Fauna Ictica asociada a la pesquería chilena de orange roughy (Hoplotesthus atlanticus) OceanDocs
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, Indico 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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Description de la pêcherie démersale céphalopodière en Mauritanie (1990 – 1992) OceanDocs
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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Distribución y abundancia de los recursos demersales en la plataforma continental del Ecuador durante junio de 1995 OceanDocs
Revelo, W..
The demersal phase (from june 24th to 09th, 1995) of cruise T95/06/02 DO, covered an area of 23833,6 km2 between 01° 04'1”N - 79° 59'6”O and 03° 22'7”S - 80° 48'0”O, of the Ecuadorian Continental Plataform, the deph range from 13 to 111 meters. 161 species were recorded, divided into 106 oseum fish species, five sharks, nine ray, 37 crustaceans, three molluscan and one holothurid (sea cucumber). Total biomass was estimated as 91685, 5 t, with 68,72% of this biomass distributed between 02° 15'1”S - 03°22'7”S, opposite to Guayaquil Gulf. The most abundant species were: Gallineta (Prionotus stephanophrys) (37283,7 t), Barriga juma (Larimus spp) (16146,2 t), Perela (Paralabrax spp) (14053,4 t), Palometa (Peprilus medius)(9865,3 t) and Cabezudo (Caulolatilus...
Tipo: Journal Contribution Palavras-chave: Demersal fisheries; Biomass; Geographical distribution; Population density; Demersal fisheries; Biomass; Geographical distribution; Population density; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_6112.
Ano: 1995 URL: http://hdl.handle.net/1834/3029
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Distribución y abundancia de los recursos demersales en la plataforma continental del Ecuador durante octubre de 1995 OceanDocs
Revelo, W..
The demersal phase (from 18th to November 01th, 1995) of cruise T95/10/04 DO, covered an area of 15632,6 km2 between 00º36'0”N-80º34'3”O and 03º22'8”S-80º49'5”O, of the Ecuadorian Continental Plataform, the depth range from 14 to 115 meters. 120 species were recorded, divided into 85 osseous fish species, three sharks, 11 ray, 18 crustaceans, two molluscan and one holothurid (sea cucumber). Total biomass was estimated as 95297,5 t; with 97,3% of this biomass distributed between 01º00'0”S and 03º23'S. The most abundant species were: barriga juma (Larimus spp) (11153 t), corvina (Cynoscion spp) (4523 t), gallineta (Prionotus spp) (55651 t), perela (Palabrax callaensis) (3774 t) and ravi junco (Centrithmus signifer) (2407 t).
Tipo: Journal Contribution Palavras-chave: Fishery resources; Demersal fisheries; Continental shelves; Abundance; Geographical distribution; Demersal fisheries; Geographical distribution; Fishery resources; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_2942; Http://aims.fao.org/aos/agrovoc/c_32413.
Ano: 1996 URL: http://hdl.handle.net/1834/2970
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Estadística pesquera de peces demersales australes en el Atlántico Sudoccidental (período 1980-2002) OceanDocs
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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Estimación de la biomasa de los recursos demersales en el golfo de Guayaquil (junio 2007) OceanDocs
Herrera, M.; Peralta, M.; Coello, D.; Elías, E.; León, J.; Cuadra, T. de la.
Se presentan los resultados obtenidos del crucero T07/06/02 D, realizado a bordo del B/I TOHALLI del Instituto Nacional de Pesca, en el Golfo de Guayaquil del 3 al 21 de junio de 2007; el estudio se complementa con información sobre condiciones físicas, químicas y planctónicas del medio marino. Tanto densidades como biomasas de las principales especies capturadas presentan disminución en sus estimados, lo que reafirma el paulatino decremento reportado en campañas anteriores. La especie chazo y camotillo presentan una distribución un tanto similar, la primera cercana al límite oeste del Golfo, en tanto que la segunda comprendió la parte central del mismo. Las densidades planctónicas obtenidas serían el resultado de condiciones oceanográficas actuales...
Tipo: Journal Contribution Palavras-chave: Demersal fisheries; Biomass; Density (population); Biological sampling.
Ano: 2010 URL: http://hdl.handle.net/1834/4797
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Estimación preliminar de la mortalidad natural de la merluza de cola (Macruronus magellanicus) en la plataforma sur-patagónica (Argentina) OceanDocs
Ehrhardt, N.M.; Prenski, L.B..
Long-tail hake, Macruronus magellanicus, is an important species in the Argentinean southern demersal species complex. Significant development of these fisheries since 1987 is indicative of the need to assess the hoki resource and for this purpose knowledge about some of the fundamental population parameters, such as natural mortality rate, is required. Knowledge on the natural mortality rate is an important element for the quantification of the resilience of the stock to fishery exploitatuib. In this study an algorithm for estimating natural mortality of hoki is developed which is based on information on abundance at age obtained from area swept methods and from age composition in the landings. As a result, natural mortality rates for ages 5 to 9 ranged...
Tipo: Journal Contribution Palavras-chave: Demersal fisheries; Mortality; Abundance; Demersal fisheries; Mortality; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1996 URL: http://hdl.handle.net/1834/1962
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Estimation par chalutage des ressources démersales du plateau continental mauritanien:Missions du N/O N'Diago ND 8703D (septembre-octobre 1986 et mars-avril 1987) OceanDocs
Girardin, M..
Tipo: Journal Contribution Palavras-chave: Estimation population; Fishery technology; Fish counters; Demersal fish; Demersal fisheries.
Ano: 1987 URL: http://hdl.handle.net/1834/4760
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Estudio sobre la calidad y utilización de algunas especies de pescado demersal de tamaño pequeño en el Ecuador OceanDocs
Montaño, R.; Bostock, T.; Andrade, B..
In the paper presented, comparisons are made between 12 species of small demersal fish (less than 30 cm O.L.) commonly found in the shrimp by-catch. Each species is described, estimates are made as to their relative abundance and fishery and complete data are presented on processing: filets, deboned minces. Taste panel work was carried out on cooked fillets as well as products made from the deboned mince and chemical analyses were made on all the species. The possibility of future increased utilization of these species is discussed.
Tipo: Journal Contribution Palavras-chave: Demersal fisheries; By catch; Shrimp fisheries; Processing fishery products; Organoleptic properties; Demersal fisheries; Organoleptic properties; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_5399.
Ano: 1985 URL: http://hdl.handle.net/1834/3156
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Estudios sobre la edad y crecimiento de la Palma Calamus brachysomus (Lockington) (Pisces: Sparidae) en aguas ecuatorianas OceanDocs
Martínez, J..
342 specimens of sparid Calamus brachysomus ”Palma”, collected during a demersal trawl survey by the R. V. Tohallí in April and May1983, were examined. The different techniques used to prepare scales and otoliths for ageing are described and analysed. The otoliths were determined to be the most reliable for ageing studies; 87% of otoliths were readable. The rings observed were assumed to be annual. The mean lengths at age were used to determine the parameters of the Von Bertalanffy growth formula, giving: Lt=50.13(1-e-0.1473(t+2.0704)). The growth curve obtained must be considered provisional due to possible biases in the interpretation of the otoliths, and also due to those arising from the selectivity of the fishing gear.
Tipo: Journal Contribution Palavras-chave: Demersal fisheries; Age; Growth; Growth curves; Otoliths; Otolith reading; Demersal fisheries; Growth; Otoliths; Age; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_3394; Http://aims.fao.org/aos/agrovoc/c_27091; Http://aims.fao.org/aos/agrovoc/c_186.
Ano: 1985 URL: http://hdl.handle.net/1834/3226
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Etat des stocks de poissons demersaux dans la zone économique mauritanienne OceanDocs
Overko, S.; Boukatine, P.; Ly, B.; Tchernichkov, P. P..
Tipo: Journal Contribution Palavras-chave: Fish stocksocks; Demersal fish; Hydrology; Ichthyology; Species; Demersal fisheries.
Ano: 1985 URL: http://hdl.handle.net/1834/4680
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Etats des lieux nationaux - Projet CEPIA: dynamiques halieutiques et systèmes de gestion des pêches OceanDocs
Projet CEPIA, Construire Ensemble une gestion des Pêches Intégrant les Amp, Dakar (Sénégal); Centre de Recherches Océanographiques de Dakar Thiaroye, Dakar (Sénégal); Djiga Thiaw; Moustapha Déme; Hamed Diaw Diadhiou; Adama Mbaye.
Commission Sous Régionale des Pêches
Tipo: Report Palavras-chave: Fisheries management; Fishery legislation; Ecosystems; Demersal fisheries; Fishery policy; Protected areas.
Ano: 2011 URL: http://hdl.handle.net/1834/4585
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Evaluación acústica de recursos pesqueros pelágicos frente a la costa sur ecuatoriana durante septiembre de 1995 OceanDocs
Chalen, X.; Vicuña, H..
Nineteen lightday rectangular transects were made 16 in the area of the Gulf of Guayaquil (Ecuador), and 3 in an oceanic area at the west of the Gulf of Guayaquil, this was the second part of research cruise, oriented to the evaluation of the small pelagic fish stocks, it was made between september 14th and 27th, 1995. The SIMRAD EK-500 acoustic system was used, installed on board of the National Research Institute (INP) R/V Tohallí. At the same time, people from the INP's Fisheries Observer Program were on four private enterprises vessels, while they were fishing in the same Gulf's area. They also made the biological sample of the commercial catch, for future relation with the results from the acoustic evaluation. The V/R Tohallí principal catch was jack...
Tipo: Journal Contribution Palavras-chave: Geographical distribution; Abundance; Demersal fisheries; Fishery resources; Continental shelves; Echo surveys; Geographical distribution; Demersal fisheries; Fishery resources; Continental shelves; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_2942; Http://aims.fao.org/aos/agrovoc/c_32413.
Ano: 1996 URL: http://hdl.handle.net/1834/2962
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