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Registros recuperados: 11
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Áreas potenciales de descarte de merluza para la actividad de la flota comercial argentina OceanDocs
Dato, C.V.; Villarino, M.F.; Cañete, G.R..
To improve the quality of the resource assessment it is necessary to estimate discards and quantify them applying an adequate methodology. The purpose of this work is to detect areas where the activity of the commercial fleet coincides with zones of high concentration of juveniles because they are potential discard areas. To establish possible seasonal and/or interannual variations, length distribution data derived from hake research surveys carried out on board of INIDEP vessels during the 1986-1993 period were analyzed. Samples were grouped per statistical rectangle on the basis of catch weighted average and mean, variance, skewness and kurtosis were calculated. The resulting parameters were subjected to a cluster analysis using the Euclidean distance...
Tipo: Journal Contribution Palavras-chave: Gadoid fisheries; Commercial fishing; Fishing grounds; Juveniles; Fishing effort; Seasonal variations; Fishing grounds; Juveniles; Fishing effort; Http://aims.fao.org/aos/agrovoc/c_2947; Http://aims.fao.org/aos/agrovoc/c_25393; Http://aims.fao.org/aos/agrovoc/c_24027.
Ano: 2006 URL: http://hdl.handle.net/1834/1586
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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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Descripción macroscópica de los ovarios del abadejo manchado (Genypterus blacodes). Escala de maduración OceanDocs
Machinandiarena, L.; Villarino, M.F.; Cordo, H.D.; Macchi, G.J.; Pájaro, M..
The macroscopic ovaric stages of pink cuskeel (Genypterus blacodes) females from the Argentine Sea (SW Atlantic) are described. They were classified in five stages of development based on changes in the appearance and size of the ovary: juvenile (I), developing (II), spawning (III), spent (IV) and resting (V).
Tipo: Journal Contribution Palavras-chave: Fecundity; Ovaries; Developmental stages; Ultrastructure; Sexual maturity; Ovaries; Developmental stages; Ultrastructure; Fecundity; Sexual maturity; Http://aims.fao.org/aos/agrovoc/c_5456; Http://aims.fao.org/aos/agrovoc/c_2230; Http://aims.fao.org/aos/agrovoc/c_8045; Http://aims.fao.org/aos/agrovoc/c_15725; Http://aims.fao.org/aos/agrovoc/c_7016.
Ano: 2003 URL: http://hdl.handle.net/1834/2421
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Dinámica de la flota comercial argentina dirigida a la pesquería de merluza (Merluccius hubbsi) en el Mar Argentino. Periodo 1990-1997 OceanDocs
Dato, C.V.; Villarino, M.F.; Cañete, G.R..
Since 1990, the Argentine commercial fleet directed to hake (Merluccius hubbsi) has obtained more than 70 of catches South of 41°S while to the North of this latitude the activity concentrated between 39°S and 41°S Argentine Sea, SW Atlantic. Bearing in mind the different characteristics of ice-chilling and freezer fleets, their activities were analyzed separately. Considering the relative percentages of catches declared in fishery statistics, the dynamics of each fleet is described per quarter and year. Special reference is made to 1997 when a closed area to protect juveniles was introduced between 44°S-47°S and 62°W-65°W. The freezer fleet activity, concentrated South of 41°S, especially South of 43°S, was stable throughout the period. It grouped around...
Tipo: Journal Contribution Palavras-chave: Gadoid fisheries; Commercial fishing; Fish catch statistics; Fishing vessels statistics.
Ano: 2003 URL: http://hdl.handle.net/1834/2479
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Distribución estacional y estructura de tallas del abadejo Genypterus blacodes en el Mar Argentino OceanDocs
Villarino, M.F..
The main purpose of this paper is to describe the seasonal distribution and length structure of the Pink cuskeel Genypterus blacodes. Data from surveys carried out between 1973-1989 were used. Basic data included Pink cuskeel densities per haul, catch length structure, depth and haul position. Pink cuskeel distribution was obtained by using the same density ranges for all seasons. A cluster analysis was applied to group the individual length structure of each survey catch. All year long the principal concentrations were within 40° and 48°S. Throughout the year the adults and juveniles were present in San Jorge Gulf, Patagonia, Argentina, so bimodal distribution were obtained. In winter juveniles were located within the sector 37° and 41°S. During autumn,...
Tipo: Journal Contribution Palavras-chave: Size distribution; Geographical distribution; Fishery surveys.
Ano: 1998 URL: http://hdl.handle.net/1834/5787
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El descarte en la flota comercial argentina dirigida a la pesquería de merluza. Período 1990-1997 OceanDocs
Dato, C.V.; Villarino, M.F.; Cañete, G.R..
Discards of the commercial fleet in the Argentine Sea (SW Atlantic) directed to hake Merluccius hubbsi were estimated in weight and number of individuals. The dynamics of the ice-chilling and freezer fleets per area and quarter and processes of discarding were analyzed. The estimation method was based on the comparison of landings and surveys length composition, the latter filtered by the selectivity of the mesh used by the commercial fleet to rebuild the length distribution of catches. It is concluded that discards had an annual variation of 42,000 t-148,000 t in the 1990-1997 period, which represented between 30 and 50 in weight and 11-24 in number of actual catches. The analysis of age groups affected by discards showed that over 90 corresponded to...
Tipo: Journal Contribution Palavras-chave: Gadoid fisheries; Commercial fishing; Fishing vessels statistics; Landing statistics; Factory ships; Factory ships; Http://aims.fao.org/aos/agrovoc/c_10732.
Ano: 2003 URL: http://hdl.handle.net/1834/2424
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Estimación cuantitativa del descarte en la pesquería de merluza realizado por la flota comercial argentina OceanDocs
Dato, C.V.; Bambill, G.A.; Cañete, G.R.; Villarino, M.F.; Aubone, A..
Based on the comparison between length composition of landings and that of research cruises, filtered by the selectivity of the mesh used by the commercial fleet, to rebuild length distribution of catches, an indirect quantitative method was developed and used to estimate, in weight and number, the individuals discarded by the commercial fleet south of 41° S. Discards ranged between 15,563 and 46,113 annual tons in the 1986-1993 period which represented 10-13% in weight and 28-32% in number of actual catches, composed of around 87% of individuals age group 1, 12% of age group 2 and the rest of individuals age groups 0 and 3.
Tipo: Journal Contribution Palavras-chave: Gadoid fisheries; Commercial fishing; Statistical analysis; Statistical analysis; Http://aims.fao.org/aos/agrovoc/c_7378.
Ano: 2006 URL: http://hdl.handle.net/1834/1587
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Estudio de la edad y crecimiento del recurso merluza común (Merluccius hubbsi) durante el período 1968-1970; determinación de las fluctuaciones del recurso OceanDocs
Villarino, M.F..
La merluza común (Merluccius hubbsi) es uno de los más importantes recursos pesqueros del Mar Argentino. Constituye aproximadamente el 68 por ciento de las capturas desembarcadas, según lo indicado por las estadísticas oficiales (Boletín Oficial, Subsecretaría de Pesca, 1988). Su explotación ha mantenido una tendencia creciente a partir de 1974, como consecuencia del incremento de las capturas de Argentina y el plan de desarrollo pesquero implementado por Uruguay. Las capturas de 1978 y 1979 superaron ampliamente el valor del rendimiento máximo sostenible, estimado en 344.000 toneladas (Verazay y Otero, 1986), y se mantienen próximas al mismo a partir del último año mencionado.Como resultado de esta explotación el recurso pesquero se redujo aproximadamente...
Tipo: Theses and Dissertations Palavras-chave: Age determination; Otoliths; Growth.
Ano: 1990 URL: http://hdl.handle.net/1834/5027
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Evaluación de la merluza (Merluccius hubbsi) en julio y agosto de 1994, entre 34º y 36ºS del Atlántico sudoccidental. OceanDocs
Villarino, M.F.; Simonazzi, M.A.; Bambill, G.A.; Ibañez, P.M.; Castrucci, R.; Reta, R..
This report contains the objectives, data collected and results from a hake assessment survey carried out in the Argentine Sea between 34° and 46° S, during July and August 1994, on board of the R/Vs "Dr. E. L. Holmberg" and "Cap. Oca Balda". The main objectives of the survey were: 1) to estimate total biomass and total abundance per age class; 2) to study the size and age composition; 3) to define the maturity ogive per size and age; 4) to quantitatively determine cannibalism and predation indexes. The area covered by the survey where 149 trawls and 184 oceanographic stations were performed was close to 100,440 nm2 . Hake biomass between 34° and 46° S was estimated in 1,105,284 tons and the confidence interval at 95. was ± 23.12. . Most of the biomass...
Tipo: Journal Contribution Palavras-chave: Stock assessment; Abundance; Biomass; Fishery surveys; Population structure; Stock assessment; Biomass; Population structure; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_6115.
Ano: 2000 URL: http://hdl.handle.net/1834/2591
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Reconstrucción de la distribución de tallas de abadejo (Genypterus blacodes) a partir de una distribución de longitudes de cabeza. OceanDocs
Villarino, M.F.; Aubone, A..
The total length distribution of pink cuskeel Genypterus blacodes catches is difficult to obtain. On the contrary, it is easy to have access to the head length distribution. So, the purpose of this study was to obtain a relationship between a certain head measurement and total length to estimate the length distribution of the catches. Individuals were obtained from bottom-trawl surveys between 39°-47°S and the San Jorge Gulf of the Argentine sea. Sets of measurements of total length (LT), maxillar length (Lmax), head length (Lc),orbital length (Lo), preorbital length (Lpo) and head length-total length ratio (r=Lc/LT) by sex were obtained. The total length was estimated with a regression model using the head length as independent variable. No significant...
Tipo: Journal Contribution Palavras-chave: Size distribution; Regression analysis; Fishery surveys; Regression analysis; Http://aims.fao.org/aos/agrovoc/c_16335.
Ano: 2000 URL: http://hdl.handle.net/1834/2532
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Talla de primera madurez del abadejo (Genypterus blacodes) en el Atlántico Sudoccidental. OceanDocs
Cordo, H.D.; Machinandiarena, L.; Macchi, G.J.; Villarino, M.F..
The length at first maturity (Lm50. ) and the maturity ogive are very important parameters in stock assessment. In this paper the ling Genypterus blacodes females Lm50. is estimated with frequencies of mature fish determined by microscope diagnosis of ovaries collected during the spawning season (SW Atlantic). The Lm50. of ling was estimated at 70.5 cm of total length (TL), which corresponds to an age of 4.5 years. The maturity process occurs between 63 and 78 cm TL (between 3.7 and 5.4 years).
Tipo: Journal Contribution Palavras-chave: Sexual maturity; Ovaries; Stock assessment; Ovaries; Stock assessment; Sexual maturity; Http://aims.fao.org/aos/agrovoc/c_5456; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_7016.
Ano: 2002 URL: http://hdl.handle.net/1834/2544
Registros recuperados: 11
Primeira ... 1 ... Última
 

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