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Registros recuperados: 6
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Ecología trófica de la merluza común (Merluccius hubbsi) del Mar Argentino. Parte 3. Consumo anual de alimento a nivel poblacional y su relación con la explotación de las pesquerías multiespecíficas. OceanDocs
Prenski, L.B.; Angelescu, V..
The English contents gives a general view on the topics treated in this contribution developed mainly on the basis of a quantitative and ecological analysis of trophic relationships in the Argentinian Continental Shelf, in which common hake and its food species are involved (anchovy, mictophids, small fishes, squids and macrozooplankton crustaceans). The most original part consist in the application of bioenergetic and simulation models for estimating the annual food consumption by individuals and by stocks of common hake during 1970-1987, considering at the same time, the effects of commercial catches on the stockbiomasses in predator-prey relationships. From this point of view three trophic-fishery relationships are evident, namely: "Common...
Tipo: Journal Contribution Palavras-chave: Trophic relationships; Food consumption; Mathematical models; Simulation; Biomass; Food consumption; Simulation; Biomass; Mathematical models; Http://aims.fao.org/aos/agrovoc/c_3016; Http://aims.fao.org/aos/agrovoc/c_5209; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_24199.
Ano: 1993 URL: http://hdl.handle.net/1834/2557
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Ecología trófica de peces demersales en el Golfo San Jorge OceanDocs
Sánchez, M.F.; Prenski, L.B..
This work is a first approach in the study of the trophic ecology from a multispecific fishery in San Jorge Gulf (45°-47°S), Argentina. Stomach contents from 28 demersal fish species were analyzed. Taxonomic and trophic spectrum were obtained. Using weight percentage of each prey, trophic spectrum variations for size classes were analized for each of the 12 considered "dominant" species. Overlaping in the diet among these predators was estimate using cluster analysis. There was an interespecific diet overlap between juveniles belonging to demersal-benthic fish species, because all of them prey upon Stomatopoda and Munida. Adults from those species and hake prefered young and adult hake as preys, while Macruronus magellanicus and juvelines Merluccius hubbsi...
Tipo: Journal Contribution Palavras-chave: Marine fish; Trophic relationships; Feeding; Zooplankton; Feeding; Zooplankton; Http://aims.fao.org/aos/agrovoc/c_2838; Http://aims.fao.org/aos/agrovoc/c_15490.
Ano: 1996 URL: http://hdl.handle.net/1834/1963
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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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Evaluación del estado de explotación de la merluza de cola Macruronus magellanicus en la plataforma sur-argentina. OceanDocs
Prenski, L.B.; Ehrhardt, N.M.; Legault, C..
Hoki, Macruronus magellanicus, is an important resource in the Argentinean multispecific southern demersal fishery. The species is distributed South of 46°S between the 50 and 200 meter isobaths. Thesouthern demersal fishery was almost nil prior to 1987, becoming more relevant toward the end of the 1980's. International fleets operating through several fishery agreement were those of the ex-Soviet Union,Bulgaria and Japan. Research on the abundance of hoki resources were initiated in the early 1970's; however, fishery research have been noticeably enhanced since 1992. In this study existing information on the Argentinean hoki fishery is integrated and an assessment of the status of exploitation of the species is carried out.As a result of the analyses, a...
Tipo: Journal Contribution Palavras-chave: Fishery management; Mortality; Abundance; Stock assessment; Gadoid fisheries; Demersal fisheries; Adaptations; Fishery management; Stock assessment; Demersal fisheries; Mortality; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1997 URL: http://hdl.handle.net/1834/1924
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Resultados de la prospección pesquera en el embalse de Salto Grande (Febrero 1980-Febrero 1981) OceanDocs
Prenski, L.B.; Baigún, C.R.M..
The present study refers to an exploratory fishing survey and appraisal in Salto Grande Reservoirs, during the first year postimpoundment, Samples were taken bimontly at six sampling stations located in different regions of the lake, using a standard gang of gill nets. The fishing effort in each station was taken as one night and the results are expressed in terms of catch per unit effort (CPUE). A survey of the species present vulnerable to the gears used, was made for the explotable species taking into account their distribution according to the mesh size and the proportion of fish at comercial size.
Tipo: Journal Contribution Palavras-chave: Exploratory fishing; Exploratory fishing; Http://aims.fao.org/aos/agrovoc/c_2759.
Ano: 1986 URL: http://hdl.handle.net/1834/2024
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Sobre los conceptos de utilización de biomasa excedentes de merluza de cola Macruronus magellanicus bajo esquemas de administración pesquera basadas en F 0,1, y F 30. RDP. OceanDocs
Ehrhardt, N.M.; Legault, C.; Prenski, L.B..
In this work we present a process of risk analysis related to the adoption of a Total Allowable Catch (TAC)based in series of allowable biological catches which contain uncertainty derived of the recruitment patterns which characterize the stock. With the information obtained by the F0,1, and F30. RDP, the exploitation ratio and with the 500 values of the projected biomass of 1995 obtained by Monte Carlo simulation, we calculate the distribution of the allowable biological catches under a scheme of F0,1, and F30. RDP andfor a natural mortality of 0.38. The selected TAC is expected to beas closer as possible to the reference fishery mortality F0,1, and F30. RDP. As a result of the present risk analysis in this study in Macruronus magellanicus of the SW...
Tipo: Journal Contribution Palavras-chave: Fishery management; Risks; Biomass; Statistical analysis; Gadoid fisheries; Fishery management; Biomass; Statistical analysis; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_7378.
Ano: 1997 URL: http://hdl.handle.net/1834/1936
Registros recuperados: 6
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