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Registros recuperados: 87
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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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Muestreo de desembarque de caballa (Scomber japonicus) en el puerto de Mar del Plata (38° S) y determinación de niveles de captura en el área El Rincón; período 1989-2003 OceanDocs
Perrotta, R.G.; Garciarena, A.D.; Hernandez, D.R..
Chub mackerel caught by the commercial fleet in El Rincón (39°-41° 30’ S) and Mar del Plata (38° S) areas was analyzed. In 2001 and 2002 samples from El Rincón were obtained from landings or collected by scientific observers on board the commercial ships. Samples from Mar del Plata were acquired during the 2001-2002 and 2002-2003 fishing seasons, on board two vessels of the small purse-seine fleet. Landings were mostly adults and only a small fraction of juveniles was observed (< 5%). Length growth parameters from El Rincón samples were estimated, and length-weight and length-age relationships were fitted by Least Squares. The results were as follows: L(mm) = 538.4; k (years-1) = 0.122; t0 (years) = -4.92; Pt = 4*10-7 * Lt 3.536. Natural mortality was...
Tipo: Journal Contribution Palavras-chave: Landing statistics; Catch/effort; Growth; Commercial fishing; Length-weight relationships; Growth; Http://aims.fao.org/aos/agrovoc/c_3394.
Ano: 2007 URL: http://hdl.handle.net/1834/2516
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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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Pesca recreativa en jardines de la reina, Cuba: caracterización y percepción sobre el estado de conservación del área. OceanDocs
Figueredo Martín, T.; Pina Amargós, F.; Angulo Valdés, J.; Gómez Fernández, R..
La pesca recreativa es una variedad turística practicada alrededor del mundo, siendo cada vez más preferida la captura y liberación. Pocos estudios han sido realizados sobre las pesquerías recreativas en Cuba y ninguno enfocado a las características socio-económicas de la misma. Los objetivos del presente trabajo son (1) caracterizar socioeconómicamente las pesquerías recreativas en Jardines de la Reina y (2) evaluar la percepción de los visitantes sobre la conservación de los recursos naturales del área. Para ello fueron encuestados 93 pescadores recreativos procedentes de 13 países, fundamentalmente de Reina Unido, Canadá, Argentina y Estados Unidos. La muestra fue dominada por hombres, con edades entre 41 y 50 años, casados y graduados...
Tipo: Journal Contribution Palavras-chave: Conservation (fishery products); Catch/effort; Socioeconomic aspects; Conservation; Fisheries management.
Ano: 2010 URL: http://hdl.handle.net/1834/4532
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Pesca comercial de merluza al sur de 41°S y estimación de índices de abundancia derivados de la flota pesquera OceanDocs
Irusta, G.; Pérez, M.; Renzi, M.A.; Castrucci, R..
The activity of fishing fleets for hake Merluccius hubbsi south of 41°S Argentine Sea, SW Atlantic, is described. In order to establish the standard group of vessels, density indices derived from research cruises and ice-chilling fleets were related. Group four 1,400-1,800 HP related better to the abundance trend. Also, two series of indices associated to different fractions of the population were estimated: juveniles age 2) and adults age 3-5. Finally, a total catch per unit effort CPUE for the region south of 41°S, which showed a declining trend during the period considered 1991-1997, was calculated.
Tipo: Journal Contribution Palavras-chave: Commercial fishing; Gadoid fisheries; Catch/effort; Abundance; Fishing vessels statistics.
Ano: 2003 URL: http://hdl.handle.net/1834/2420
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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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Situación actual del guariche Ucides occidentalis (Ortmann, 1897) en el estuario del río Chone, Manabí durante abril 2009 – 2010. OceanDocs
Moreno, J.; Ruíz, W..
Durante el período abril 2009 – 2010 se analizó la situación pesquera artesanal del recurso guariche o cangrejo rojo Ucides occidentalis (Ortmann, 1897) en el estuario del Río Chone, considerando desembarques comerciales y su hábitat “in situ”. El esfuerzo total promedio correspondió 84 recolectores/día pesca, con una captura promedio de 36 cangrejos o su equivalente a 6 sartas u atados. Se registró un 90% de ejemplares macho con talla promedio de 7.5 cm de ancho cefalotorácico (AC); mientras que el 10% de ejemplares hembras presento una talla promedio de 6.5 cm AC. El muestreo de densidad poblacional se lo realizo en 36 estaciones correspondiente a las seis localidades cangrejeras ubicadas en el estuario reportando una densidad de 0.7 cangrejos/m2....
Tipo: Journal Contribution Palavras-chave: Crab fisheries; Landing statistics; Catch/effort; Size-limit regulations; Size composition; Fishery surveys.
Ano: 2010 URL: http://hdl.handle.net/1834/4794
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Resultados del monitoreo de la tortuga carey (Eretmochelys imbricata) en los dos sitios de captura comercial: Cocodrilo (Isla de la Juventud) y Nuevitas, Cuba OceanDocs
Medina, Y.; Moncada, F.; Nodarse, G..
Se presentan los resultados obtenidos para la tortuga carey (Eretmochelys imbricata) en la plataforma cubana, a partir de los monitoreos en los dos sitios de captura comercial: Cocodrilo (Isla de la Juventud) y Nuevitas; entre 1995 y 2006. Se analizan algunos indicadores poblacionales como el comportamiento de la composición por talla, la talla media anual y la proporción sexual de los careyes capturados, así como el comportamiento de la captura comercial anual en los dos sitios. Se concluye que la talla media de los careyes capturados en la Isla de la Juventud y Nuevitas, se ha mantenido estable a lo largo del tiempo, con un predominio de las tallas menores en la Isla de la Juventud; y que la proporción por sexos favorable a las hembras muestra un...
Tipo: Journal Contribution Palavras-chave: Monitoring; Catch/effort.
Ano: 2011 URL: http://hdl.handle.net/1834/4145
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Preliminary analysis of billfish catch rates in the Indian Ocean. OceanDocs
Campbell, R.A.; Tuck, G.N..
Due to the general lack of targeted fisheries on billfish, the resource status of these species within the Indian Ocean has not been analysed in any previous study and currently remains unknown. Nevertheless, significant quantities of billfish are caught annually in the Indian Ocean and, being generally long lived, these species remain vulnerable to overfishing. In this paper preliminary indices of stock availability are presented for the main billfish species based on the catch and effort data pertaining to the Japanese and Taiwanese Indian Ocean longline fisheries. While the indices need to be treated with some caution (due to problems relating to the accuracy of the catch and effort data, and the fact that changes in catchability have not been factored...
Tipo: Proceedings Paper Palavras-chave: Catch/effort; Stock assessment; Overfishing; Catchability; Fishing gear.
Ano: 1998 URL: http://hdl.handle.net/1834/58
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Seychelles Artisanal Fisheries Statistics for 2004 OceanDocs
Robinson, J.; Azemia, R.T..
SFA/R&D/061
Tipo: Report Palavras-chave: Artisanal fishing; Catch composition; Catch statistics; Catch/effort; Landing statistics; Catch composition; Statistics; Http://aims.fao.org/aos/agrovoc/c_1384; Http://aims.fao.org/aos/agrovoc/c_49978.
Ano: 2005 URL: http://hdl.handle.net/1834/1078
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El dorado, Salminus maxillosus (Pisces, Characiformes)en el Río de la Plata y Río Uruguay inferior OceanDocs
Sverlij, S.B.; Espinach Ros, A..
Catch per unit effort (CPUE), lenght distribution, age, growth, reproduction, migrations and feeding were studies through samples collected with longlines and a gang of gill-nets of several mesh size. CPUE data showed a progressive decrease of the relative abundance in the Río de la Plata, during the study period. Age was studied from scales. Back-calculations of growth revealed the pressence of Lee's phenomenon. Means lenghts at age were greater in females. No significant difference was found in lenght-weight regressions from both sexes and sampling areas. Only young individuals from 1 to 6 years were caught. None of the fish studied had ripening gonads. Extensive migrations were recorded both in the Paraná and Uruguay rivers. Stomach contents analysis...
Tipo: Journal Contribution Palavras-chave: Migrations; Catch/effort; Sex ratio; Size distribution; Scale reading; Growth curves; Reproduction; Stomach content; Sex ratio; Reproduction; Http://aims.fao.org/aos/agrovoc/c_7014; Http://aims.fao.org/aos/agrovoc/c_6507.
Ano: 1986 URL: http://hdl.handle.net/1834/2032
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La pesquería de besugo (Pagrus pagrus). Análisis de las capturas, esfuerzo nominal y estructura de los desembarques en 2011 OceanDocs
García, S..
Red porgy (Pagrus pagrus) fishery. Analysis of catches, nominal effort and landings structure in 2011. A descriptive analysis of red porgy (Pagrus pagrus) fishery within the Buenos Aires Coastal Ecosystem (BCE) and the Argentine continental shelf, between 34° S and 42° S, during 2011 was performed. The catches landed, of a total of 3,627 t, performed in a direct and incidental way by an heterogeneous fleet of 149 vessels belonging to five strata (Ia, Ib, Ic, IIa and IIb) in 1,527 fishing trips represented a 36.7% decrease as regards 2010. The spatiotemporal analysis allowed to determine that the highest yields of the species were obtained close to 50 m depth, that coincides with the highest surface temperatures in the area, that decrease in a...
Tipo: Journal Contribution Palavras-chave: Catch/effort; Landing statistics; Population structure; Coastal fisheries.
Ano: 2013 URL: http://hdl.handle.net/1834/5509
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Factores que afectan las tasas de captura de langostino amarillo (Cervimunida johni) en la zona norte de Chile OceanDocs
Wiff, R.; Quiroz, J.C.; Montenegro, C..
An analysis was made of the factors affecting the catch rates of the yellow squat lobster (Cervimunida johni) in Chile’s northern region (26°03’-32°10’S) by reviewing commercial fishing logbooks from 1993 to 2003. Factors evaluated included years, months, depth stratum, fishing areas and fleet characteristics as linear predictors in a generalized linear model (GLM) in order to explain variability in the catch rate. In contrast with other fisheries, with this resource the technical characteristics of the fleet and its’ specialization poorly explain variations in catch rate; temporal factors and their interaction were, however, highly significant. The results of this study, together with the life history of the resource, allow the supposition that...
Tipo: Journal Contribution Palavras-chave: Modelling; Catch/effort; Crustacean fisheries; Lobster fisheries.
Ano: 2005 URL: http://hdl.handle.net/1834/2070
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Seychelles demersal fishery an analysis of data relating to four key demersal species OceanDocs
Mees, C. C..
Seychelles demersal fishery is described based on historic catch and effort data, and on biological studies of four key species: Batrican (Pristipomoides filamentosus), Job Gris (Aprion virescens), Bourgeois (Lutjanus sebae), and Maconde (Epinephelus chlorostigma). During the period 1985 - 1990 demersal species formed on average 33_310= of the total annual landings of the local fishing fleet. Schooners and whalers were the most important boat types engaging in this fishery, and more recently, a mother ship dory fishing operation. Demersal species constituted 77_310= of all local fish exports over this period. In 1990 approximately 2,000 tonnes of demersal species were landed of which 500 tonnes were exported. Lutjanids comprised 62_310= of the demersal...
Tipo: Report Palavras-chave: Demersal fisheries; Fishery data; Fish catch statistics; Catch/effort; Yield predictions; Catch composition; Pristipomoides filamentosus; Aprion virescens; Lutjanus sebae; Epinephelus chlorostigma.
Ano: 1992 URL: http://hdl.handle.net/1834/5114
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Pesca comercial y captura por unidad de esfuerzo de la merluza (Merluccius hubbsi) entre 34º S-41º S durante el período 1986-2005 y evidencias sobre cambios en la distribución y composición por tallas del recurso OceanDocs
Irusta, G.; Castrucci, R.; Simonazzi, M..
The activity of the hake (Merluccius hubbsi) commercial offshore ice chilling fleet and its relation to concentration, distribution and population areas of the stock distributed between 34ºS - 41ºS is described. The catch per unit of effort (CPUE) for the 1986-2005 period was estimated applying the General Linear Model. Data derived from the offshore fishing logs provided by the Argentine Secretary of Agriculture, Farming, Fishing and Food Administration and the information obtained in research cruises carried out in 1994, 1996-2001, 2003-2005 to evaluate the resource population abundance. During the main fishing time in the sector (quarter 2) and up until 1991 the fleet scattered within the Argentine-Uruguayan Common Fishing Zone (SW Atlantic). Later on...
Tipo: Journal Contribution Palavras-chave: Catch/effort; Commercial fishing; Catch statistics; Fishing effort; Size distribution; Exclusive economic zone; Gadoid fisheries; Marine environment; Marine environment; Fishing effort; Http://aims.fao.org/aos/agrovoc/c_4610; Http://aims.fao.org/aos/agrovoc/c_24027.
Ano: 2009 URL: http://hdl.handle.net/1834/3462
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Evaluación del recurso abadejo y recomendaciones sobre su explotación a partir del año 2002 OceanDocs
Cordo, H.D..
Ling (Genypterus blacodes) resource was assessed by means of an age structured production model fitted with stock abundance indices from catch per unit effort data (CPUE) obtained from the commercial fishing fleet. Reproductive stock was assessed in the same way with CPUE data from the fishery research vessel. A short-term analysis of collapse risk as a function of 1999 and 2000 fishing mortalities was carried out with the results, and also a long-term analysis with the assumption of a variable fishing mortality (F) with two recruitment hypotheses. Results show that the present state of the Ling resource has worsened with respect to the last assessment. Considering the best of all cases, the Br/Kr relationship decreased from 0.55 to 0.33, indicating that...
Tipo: Journal Contribution Palavras-chave: Stock assessment; Catch/effort; Fishery management; Risks; Gadoid fisheries; Commercial fishing; Stock assessment; Fishery management; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_24026.
Ano: 2007 URL: http://hdl.handle.net/1834/2518
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Les crevettes en Mauritanie, biologie et pêche OceanDocs
Diop, M..
Les prises de crevettes au large de la Mauritanie connaissent une évolution en dent de scie depuis 1989. Les captures déclarées sont de 1112 tonnes en 1987 (dont 1099 tonnes pour le seul second semestre). Elles sont composées à 66% de Penaeus spp (espèces côtières). Les espèces <Parapenaeus longirostrus> et Aristeus spp dont les distributions sont plus profondes ont contribué pour 29 et 5% respectivement des captures totales de crevettes en 1987.
Tipo: Journal Contribution Palavras-chave: Catch composition; Catch/effort; Shrimp fisheries; Catch composition; Http://aims.fao.org/aos/agrovoc/c_1384.
Ano: 1989 URL: http://hdl.handle.net/1834/1145
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Standardization of catch per unit of effort for swordfish and billfishes caught by the Japanese longline fishery in the Indian Ocean. OceanDocs
Uozumi, Y..
In the present analysis, CPUEs of swordfish and billfishes are standardized with fine-scale statistics to eliminate some possible biases in the CPUE trend which may be introduced by the factors mentioned above.
Tipo: Proceedings Paper Palavras-chave: Catch/effort; Longlining; Catching method; Fishing effort.
Ano: 1998 URL: http://hdl.handle.net/1834/57
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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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Flota pesquera Argentina. Evolucion 1960-1998 con una actualizacion al 2000. OceanDocs
Bertolotti, M.I.; Verazay, G.A.; Pagani, A.N.; Errazti, E.; Buono, J.J..
The analysis of the Argentine fishing fleet (SW Atlantic) evolution as of 1960 allows to explain the major causes of expansion, the crisis in the fisheries and the structural changes of the fleet during the 90's. Different fleet classification criteria focused on fishing capacity, fish landing composition, yields and productivity indices are described. The expansion cycles were associated to the incorporation of fishing vessels, while the 1960-1989 crisis originated in domestic and international economic crisis and changes in the strategy pattern of the fishing countries. The latter was related to overfishing of traditional coastal and demersal fisheries and to the full exploitation of resources such as squid, blue whiting and toothfish incorporated to the...
Tipo: Book Section Palavras-chave: Fishing vessels; Fishery economics; Fishing vessels statistics; Overfishing; Landing statistics; Catch/effort; Yield; Fishing vessels; Overfishing; Http://aims.fao.org/aos/agrovoc/c_2954; Http://aims.fao.org/aos/agrovoc/c_34068.
Ano: 2001 URL: http://hdl.handle.net/1834/2587
Registros recuperados: 87
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