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Estado de explotación del recurso besugo (Epigonus crassicaudus) en Chile OceanDocs
Wiff, R.; Quiroz, J.C.; Tascheri, R..
The exploitation status of cardinalfish (Epigonus crassicaudus) yielded in Chile between 33° to 41°S was analyzed. An indirect assessment was performed between 1997 and 2003 through size-structured model with a transition matrix defining the changes among sizes. The model was calibrated using size structures, official landings, catch-per-unit of effort (CPUE) taken from commercial fishing logbooks and standardized by generalized linear models (GLM). After 7 years of an intense fishery activity, we concluded that the cardinalfish resource in Chile is on the recruitment overfishing limit. On 2003, the spawning biomass with respect to the virginal spawning biomass is close to 40%. The biological references points (BRP) based on spawning per recruit biomass...
Tipo: Journal Contribution Palavras-chave: Exploitation; Fisheries; Stock assessment; Fisheries; Stock assessment; Http://aims.fao.org/aos/agrovoc/c_2934; Http://aims.fao.org/aos/agrovoc/c_24251.
Ano: 2005 URL: http://hdl.handle.net/1834/2069
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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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