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  • Fisheries  (1)
  • Modelling  (1)
  • General Chemistry
  • Theoretical, Physical and Computational Chemistry
  • Pontificia Universidad Católica de Valparaíso  (2)
  • 2005-2009  (2)
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    Pontificia Universidad Católica de Valparaíso
    Publikationsdatum: 2021-05-19
    Beschreibung: 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 (SPR) support this assesment because the fishing mortality level on 2003 (Fact) was very close to fishing mortality level of 40% of SRP at virginal value (F40%).
    Beschreibung: Published
    Beschreibung: Besugo, Cardinalfish
    Schlagwort(e): Fisheries ; Stock assessment ; Exploitation ; Fisheries ; Stock assessment
    Repository-Name: AquaDocs
    Materialart: Journal Contribution
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 2
    Publikationsdatum: 2021-05-19
    Beschreibung: 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 standardized catch rates are appropriate as an index of relative abundance in this fishery.
    Beschreibung: Published
    Beschreibung: Genaralized linear model
    Schlagwort(e): Modelling ; Catch/effort ; Crustacean fisheries ; Lobster fisheries
    Repository-Name: AquaDocs
    Materialart: Journal Contribution , Non-Refereed , Article
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
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