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Registros recuperados: 87
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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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Abundancia relativa y rendimiento máximo sostenible de la merluza común (Merluccius hubbsi) OceanDocs
Otero, H.O..
The statistics provided by the Argentinean Fishing Vessel and the biological data collected by scientist in the last eleven years, allow us to estimate different aspects of the population dynamics of the common hake (Merluccius hubbsi). This work deals with the relative abundance and the maximal sustainable yield of this species, considering the bonaerense stock of the Southewest Atlantic. Analyzing the effective fishing density, concluding remarks can be made. The high catches of 1967 (more than 600.000 tons.)made by the Russian Fleet, affected the fishing density in 1968. Since 1969, the resource recovered the high density level as a consequence of a decrease in the catches and in the fishing effort, but vulnerability of the stock is shown.
Tipo: Journal Contribution Palavras-chave: Catch/effort; Potential yield; Hake fisheries.
Ano: 1980 URL: http://hdl.handle.net/1834/5456
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Abundancia relativa y rendimiento máximo sostenible de la merluza común (Merluccius hubbsi) OceanDocs
Otero, H.O..
The statistics provided by the Argentinean Fishing Vessel and the biological data collected by scientist in the last eleven years, allow us to estimate different aspects of the population dynamics of the common hake (Merluccius hubbsi). This work deals with the relative abundance and the maximal sustainable yield of this species, considering the bonaerense stock of the Southewest Atlantic. Analyzing the effective fishing density, concluding remarks can be made. The high catches of 1967 (more than 600.000 tons.)made by the Russian Fleet, affected the fishing density in 1968. Since 1969, the resource recovered the high density level as a consequence of a decrease in the catches and in the fishing effort, but vulnerability of the stock is shown.
Tipo: Journal Contribution Palavras-chave: Catch/effort; Potential yield; Hake fisheries.
Ano: 1980 URL: http://hdl.handle.net/1834/2061
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Acerca del poder de pesca y capturabilidad en la pesquería de caballa (Scomber japonicus) de Mar del Plata OceanDocs
Perrotta, R.G..
Analyzed in this paper is the structure of the fleet applied to mackerel fishing based at Mar del Plata Port (38° LS); an attempt is also made at establishing the best system for measuring the fishing effort; the changes in catch capability (availability and vulnerability)are duly analyzed. Sampling vessels that allow greater data, particulary by in relation to the fishing effort, are available since the 1983/84 fishing season.
Tipo: Journal Contribution Palavras-chave: Catch/effort; Catchability; Fishing fleet.
Ano: 1988 URL: http://hdl.handle.net/1834/1959
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Análisis de la flota dedicada a la pesca de corvina rubia y distribución de tallas del desembarque. Período 1992-1995 OceanDocs
Carozza, C.R.; Perrotta, R.G.; Cotrina, C.P.; Bremec, C.; Aubone, A..
This work deals with the structure and efficiency of the fleet fishing white croaker in Argentina. Results show that there exist two strata delimited by 17.25 m length and 345 HP vessels. The most efficient is constituted by those of smaller dimensions. During 1992-1995 landings were sampled and subsequently analyzed. A decrease in mean length landed and an increase of juveniles presence were detected. The situation coincided with an increment of catches, landings, fishing effort, exports and the fleet activities in "El Salado" area (35° 57' - 36° 57' LS).
Tipo: Journal Contribution Palavras-chave: Fishing vessels; Catch/effort; Catch statistics; Fishing vessels; Http://aims.fao.org/aos/agrovoc/c_2954.
Ano: 2001 URL: http://hdl.handle.net/1834/2594
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Análisis de la utilización de la captura por unidad de esfuerzo de pescadilla de red (Cynoscion guatucupa) como índice de abundancia anual. Período 1992-2004 OceanDocs
Perrotta, R.G.; Ruarte, C.O..
The stripped weakfish (Cynoscion guatucupa) caught in Brazil, Uruguay and Argentina (SW Atlantic) has a wide latitudinal distribution (22° S-43° S). In Argentina there are two main fishing areas, the Argentine-Uruguayan Common Fishing Zone and 'El Rincón', southern zone of the Buenos Aires littoral. The importance of the species makes it necessary to define an annual abundance index that would allow to diagnose the state of the stock. The model adjusted to calculate the index is the General Linear Model. The factors used were Year, Quarter, Length, Stratum (4 categories) and sub-areas (5 categories), all statistically significant. The problem generated by the presence in the model of first order interactions that include the Year factor is discussed. The...
Tipo: Journal Contribution Palavras-chave: Catch/effort; Mathematical models; Coastal fisheries; Marine environment; Marine environment; Mathematical models; Coastal fisheries; Http://aims.fao.org/aos/agrovoc/c_4610; Http://aims.fao.org/aos/agrovoc/c_24199; Http://aims.fao.org/aos/agrovoc/c_1696.
Ano: 2009 URL: http://hdl.handle.net/1834/3461
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Análisis secuencial de la población de merluza de cola (Macruronus magellanicus)en el atlantico sudoccidental período 1985-1995. OceanDocs
Wöhler, O.C.; Giussi, A.R.; Hansen, J.E..
Sequential population analysis on Long Tail Hake (Macruronus magellanicus)from the Southwest Atlantic. Years 1985-1995. VPA on the Long Tail Hake (Macruronus magellanicus), based on data covering the years 1985 up to 1995, was performed to assess the current state of the stock. Simulation trials, inducing uncertainty about both the natural mortality rate and recruitment were also accomplished, to evaluate the risk of overfishing which is associated to different fishing alternatives, always under the assumption of a single and closed Long Tail Hake population. CPUE data were not appropriate for tunning, so the traditional VPA has been applied. During the period of study, stock biomass and spawning stock biomass showed an increased trend. Long and short-term...
Tipo: Journal Contribution Palavras-chave: Stock assessment; Fishery management; Catch/effort; Fishing mortality; Overfishing; Biomass; Sexual maturity; Stock assessment; Fishery management; Biomass; Overfishing; Sexual maturity; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_34068; Http://aims.fao.org/aos/agrovoc/c_7016.
Ano: 1999 URL: http://hdl.handle.net/1834/1875
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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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Analysis and prediction of yellowfin tuna (Thunnus albacares) catch rates of longline fisheries in the western Indian Ocean using a neural network. OceanDocs
Nishida, T.; Komatsu, T..
Strengthening tuna management is one of the primary tasks for the new Indian Ocean Tuna Commission (IOTC). Stock assessment and the prediction of the dynamics of the tuna resources will become increasingly important research topics because they provide the basic information for the management decision process. Under these circumstances, this paper attempts to develop the stock analyses and prediction techniques using neural networks. As a first step and as a test study, analyses and predictions of catch rates of the Japanese yellowfin tuna longline fisheries are attempted.
Tipo: Proceedings Paper Palavras-chave: Fishery management; Stock assessment; Catch/effort; Tuna fisheries.
Ano: 1998 URL: http://hdl.handle.net/1834/60
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Aspectos de la pesca de la polaca (Micromesistius australis) por parte de la flota argentina en el período 1989 - 1995 OceanDocs
Wöhler, O.C.; Marí, N.R..
Basic aspects concerning southern blue whiting (Micromesistius australis) fishing by the Argentine fleet in the period 1989-1995 are analized. Catch and effort statistics, fleet operation modalities and spatial and temporary characteristics of fishing activities are included. The basic information to perform this analysis was collected from the fishing statistics provided by the Subsecretaría de Agricultura, Ganadería y Pesca of Argentina and from reports of the Observers Program on board of the commercial fleet. It was in 1989, when the first ship for surimi production entered the fishery, that southern blue whiting catches carried out by the Argentine fleet became important. As of 1989 catches increased in a steady way to stabilize at near 100,000 annual...
Tipo: Journal Contribution Palavras-chave: Catch statistics; Fishing grounds; Catch/effort; Fishing grounds; Http://aims.fao.org/aos/agrovoc/c_2947.
Ano: 1999 URL: http://hdl.handle.net/1834/2528
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Aspectos generales de la pesca del bonito (Sarda sarda)en la Argentina OceanDocs
Hansen, J.E..
Basic aspects of the fising of Bonito in Argentina such as: catch statistics, fleet and gears, season and fishing grounds, and catch per unit effort (CPUE)are analized. FAO World Catch Statistics show that none of the different populations of Sarda sarda or other species of the Genus may support a highly productive fishery Exceptions are Sarda chilensis and S.sarda from the Black Sea, which us exploited by Turkey. On the basis of available information it may be inferred that the Bonito of Argentina has more competitors and a narrower thophic spectrum than that from the Black Sea.
Tipo: Journal Contribution Palavras-chave: Landing statistics; Fishing gear; Fishing vessels; Catch/effort; Fishing gear; Fishing vessels; Http://aims.fao.org/aos/agrovoc/c_2946; Http://aims.fao.org/aos/agrovoc/c_2954.
Ano: 1987 URL: http://hdl.handle.net/1834/2009
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Atlas demographique des populations de poissons d'eau douce d'Afrique AgEcon
Moreau, J.; Palomares, M.L.D.; Torres, F.S.B.; Pauly, Daniel.
Tipo: Report Palavras-chave: Freshwater fish; Population dynamics; Stock assessment; Growth curves; Catch/effort; Recruitment; Fishery biology; Africa; Resource /Energy Economics and Policy.
Ano: 1995 URL: http://purl.umn.edu/44838
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Beneficio económico de la caballa (Scomber japonicus) con relación a la temperatura superficial del mar en el área de Mar del Plata. OceanDocs
Perrotta, R.G.; Hernandez, D.R..
The temperature that limits the presence of schools of Argentine chub mackerel Scomber japonicus was found to be around 19°C in the Mar del Plata area Buenos Aires prov., Argentina. At higher values, most shoals leave coastal waters in direction to the mid-shelf. An inverse relationship was observed between catches per unit of effort CPUE and sea surface temperature. The highest CPUE values corresponded to temperatures lower than 19°C. Beyond that value, the possibility of obtaining a CPUE higher than the unit is nearly null and the low standard deviation means it is unlikely to reach high CPUE values. The economic profit per minute of each daily cruise was estimated using a case study carried out with a single vessel pilot with mean structural and...
Tipo: Journal Contribution Palavras-chave: Catch/effort; Surface temperature; Fishery management; Commercial fishing; Mackerel fisheries; Fishery management; Http://aims.fao.org/aos/agrovoc/c_24026.
Ano: 2002 URL: http://hdl.handle.net/1834/2543
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Capturas de cangrejo rojo Ucides occidentalis en los puertos de la provincia del Guayas y El Oro, Ecuador, durante 2009 OceanDocs
Solano, F.; Flores, L.; Ruiz, W..
Durante el 2009, se realizó el seguimiento de las capturas de cangrejo rojo (Ucides occidentalis), en las principales localidades de extracción de la provincia de El Oro y Guayas, la captura total estimada de cangrejos fue de 2 897 707 y 3 184 795 en las provincias mencionadas. Las localidades de Puerto Jelí y Puerto Baquerizo Moreno fueron las de mayor desembarque, lo que está relacionado directamente con el esfuerzo. La CPUE fue muy variada en los puertos monitoreados con valores que oscilaron entre 47 a 94 cangrejos hombre-1 día-1, obteniéndose mayores niveles en el periodo posterior a la época de veda. La distribución de tallas de amplitud del cefalotórax de los cangrejos capturados, en cada una de las localidades muestreadas, fue superior a la talla...
Tipo: Journal Contribution Palavras-chave: Catch/effort; Crab fisheries; Size-limit regulations; Landing statistics.
Ano: 2010 URL: http://hdl.handle.net/1834/4793
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Característica y dinámica de la explotación de corvina rubia (Micropogonias furnieri) durante la zafra invernal, años 1995 a 1997. OceanDocs
Lasta, C.A.; Carozza, C.R.; Suquelle, P.; Bremec, C.; Errazti, E.; Perrotta, R.G.; Cotrina, C.P.; Bertelo, C.; Boccanfuso, J..
Whitemouth croaker Micropogonias furnieri fishery during three intensive fishing seasons in the outer area of the La Plata River (Argentina-Uruguay) is analyzed. Resource exploitation in the South Atlantic area shows a general retraction of the distribution range and an isolation of the La Plata River stock where most of the fishing effort concentrates. The species market evolution brought about, for Argentina and Uruguay, an important shift in its dynamics as of 1992, when the product insertion in Asiatic markets generated an important commercial attraction and a subsequent increase in the fishing effort by the argentine inshore coastal fleet. This caused a change in the fishery development in Argentina and the establishment, in winter, of a fleet...
Tipo: Journal Contribution Palavras-chave: Coastal fisheries; Fishery management; Catch/effort; Landing statistics; Marketing; Fishery management; Marketing; Coastal fisheries; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_4620; Http://aims.fao.org/aos/agrovoc/c_1696.
Ano: 2000 URL: http://hdl.handle.net/1834/2540
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Características biológicas y de la pesca del savorín Seriolella porosa (Pisces: Centrolophidae) del Mar Argentino OceanDocs
Garciarena, A.D.; Perrotta, R.G..
Length growth parameters were calculated and total length-weight and total length-fork length relationships, which showed no differences between sexes, were fitted for the South Atlantic bream (Seriolella porosa). Length at first maturity was also calculated. The results were as follows: L (mm)= 490.96k years-¹) = 0.154; t0 (years)= -3.915; W(g) = 4*10-6)*TL³.1989; FL(mm) = 0.8917*TL1.0006);L sub 50 (mm)= 290.61. Natural mortality was estimated at 0.274 and limit age at 11 years. Samples were taken during research surveys carried out in 1999 and 2000 in the Argentine Sea (Atlantic SW). Sagittae otoliths of 374 specimen were used for age determination. Total fish length ranged from 226 mm to 550 mm (1-14 years). Commercial landing data of trawl fleets for...
Tipo: Journal Contribution Palavras-chave: Growth rate; Natural mortality; Length-weight relationships; Catch/effort; Landing statistics; Fishery biology; Fishery resources; Growth rate; Fishery biology; Fishery resources; Http://aims.fao.org/aos/agrovoc/c_16130; Http://aims.fao.org/aos/agrovoc/c_2937; Http://aims.fao.org/aos/agrovoc/c_2942.
Ano: 2002 URL: http://hdl.handle.net/1834/2416
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Caracterización de la pesquería artesanal de la localidad de Monte Hermoso OceanDocs
Pérez, M.A.; Ruarte, C.O..
Monte Hermoso (Province of Buenos Aires, Argentina) is a tourist town inhabited by a large number of artisanal fishermen. The aim of this study was to characterize, through a descriptive analysis, the operational activity of the artisanal fleet and quantify the catches landed per species. The ships, of a trucker type, are 6-9 m length equipped with a 40-90 HP outboard motor. The data analyzed derive from purchase slips furnished by a gatherer corresponding to the November 2009-October 2010 period. The target species were stripped weakfish (Cynoscion guatucupa) and patagonian smoothhound (Mustelus schmitti). The former was caught with hand line throughout the year, essentially between September-December. The latter was fished during March-April and...
Tipo: Journal Contribution Palavras-chave: Coastal fisheries; Artisanal fishing; Catch/effort; Landing statistics.
Ano: 2013 URL: http://hdl.handle.net/1834/5489
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Caracterización del proceso de descarte de merluza (Merluccius hubbsi) en la flota de buques congeladores y factorías. Resultados preliminares a partir de los datos recolectados por observadores del INIDEP en seis mareas realizadas entre agosto y diciembre de 1995. OceanDocs
Cañete, G.R.; Dato, C.V.; Villarino, M.F..
Pursuant to SAGyP resolution No. 814/93, during August-December 1995, six INIDEP Fishery Observers trips on board of processing vessels of the Argentine fleet were carried out. They represented 256 navigation days, 232 effective fishing days, 725 fishing trawls and 2,245 trawling hours. Data measured on board were compared to those reported in the fishing log corresponding to the same cruise and submitted to the DNPyA by the Skipper. Catches observed and reported differ by 3985,7 t (28.2. ), with a maximum difference of 1,200 t in a single cruise. In the case of trawling hours, an important fluctuation of values was observed and, in two cases, the number of hours declared exceeded those actually performed (111 and 72). In the other four cruises, between 3...
Tipo: Journal Contribution Palavras-chave: Factory ships; Fishery surveys; Research programmes; By catch; Catch/effort; Fish catch statistics; Gadoid fisheries; Factory ships; Http://aims.fao.org/aos/agrovoc/c_10732.
Ano: 2000 URL: http://hdl.handle.net/1834/2535
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Description de l'activité de la flottille industrielle pélagique dans la zone économique exclusive mauritanienne en 1990 OceanDocs
Ould Taleb Ould Sidi, M.M..
Résumé : En 1990, la pêcherie pélagique en Mauritanie s’est caractérisée par d’importantes variations – tant en termes d’effort et de rendement qu’au niveau de la composition spécifique des captures – par rapport aux années antérieures. En effet, l’effort, exprimé en jours de pêche standards, a atteint 9761 jours de pêche standards ; ce qui constitue une augmentation de plus de 21% par rapport à 1989. Aussi, avec 372000 tonnes, les captures totales ont enregistré une augmentation de 4,4%. Pour sa part, la Prise par Unité d’Effort (PUE) a enregistré un recul sensible passant de 44 tonnes/jour de pêche (t/jp) en 1989 à 38 t/jp en 1990. La composition spécifique des captures a été marquée par une augmentation importante de la contribution des sardinelles qui...
Tipo: Journal Contribution Palavras-chave: PUE; Pelagic fish; Catch/effort; Capture fisheries.
Ano: 1996 URL: http://hdl.handle.net/1834/232
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Description de l'activité des bateaux industriels de pêche pélagique dans la zone économique exclusive mauritanienne en 1989. OceanDocs
Ould Taleb Ould Sidi, M.M..
Résumé: L’effectif des bateaux de pêche pélagique qui ont opéré dans la zone économique exclusive mauritanienne en 1989 s’élève à 63. L’effort de pêche standard de la flottille chalutière étrangère a atteint 8021 jours de pêche. Les prises effectuées sont de l’ordre de 356.000 tonnes dont 76% réalisés par la flottille de l’Union Soviétique et 23,5% par celle de la Roumanie. La composition spécifique est dominée par les chinchards avec 47%. Les sardinelles représentent environ 18% et la sardine plus de 15%. Les sabres et la rubrique divers occupent respectivement 6,26 et 7 ,40%.
Tipo: Journal Contribution Palavras-chave: Catch/effort; Pelagic fish.
Ano: 1995 URL: http://hdl.handle.net/1834/254
Registros recuperados: 87
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