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Factors that affect the mean size of Chilean hake (Merluccius gayi gayi) caught with gillnets in 2001-2018 in central Chile

dc.contributorInstituto de Fomento Pesqueroen-US
dc.creatorQueirolo, Dante
dc.creatorSateler, Jorge
dc.date2023-02-28
dc.date.accessioned2023-03-08T17:25:51Z
dc.date.available2023-03-08T17:25:51Z
dc.identifierhttp://lajar.ucv.cl/index.php/rlajar/article/view/vol51-issue1-fulltext-2904
dc.identifier10.3856/vol51-issue1-fulltext-2904
dc.identifier.urihttps://revistaschilenas.uchile.cl/handle/2250/222720
dc.descriptionChilean hake (Merluccius gayi gayi) is one of central Chile's most important demersal resources, and its fishery involves an artisanal fleet that mainly uses gillnets. In the recent history of the fishery, there has been a decrease in catch sizes and a progressive reduction in mesh sizes. This study aimed to analyze the factors that influenced the mean catch sizes of Chilean hake between 2001 and 2018 to understand this situation, correlating the response of fishermen with the capture efficiency of the nets used. Applying a generalized linear model, a significant effect of the factors year, port (zone), and mesh size were observed on the mean size of individuals caught. The model explained 85% of the deviation, the greatest relative contributions being made by the factors year (53.6%) and port (30.2%). A lower effect was estimated for the mesh size factor with 1.2% deviance. These findings suggest that the progressive reduction in mesh sizes is associated with a response to the demographic change in the stock. Differentiated management measures by zones could be considered in the fishery, given the estimated differences.en-US
dc.formatapplication/pdf
dc.languageeng
dc.publisherPontificia Universidad Católica de Valparaísoen-US
dc.relationhttp://lajar.ucv.cl/index.php/rlajar/article/view/vol51-issue1-fulltext-2904/1667
dc.relationhttp://lajar.ucv.cl/index.php/rlajar/article/downloadSuppFile/vol51-issue1-fulltext-2904/2316
dc.rightsCopyright (c) 2023 Latin American Journal of Aquatic Researchen-US
dc.sourceLatin American Journal of Aquatic Research; Vol 51, No 1 (2023); 67-78en-US
dc.sourcePlataforma para envío de artículos - Latin American Journal of Aquatic Research; Vol 51, No 1 (2023); 67-78es-ES
dc.source0718-560X
dc.source0718-560X
dc.subjectMerluccius gayi gayi; Chilean hake; gillnet; mesh size; artisanal fleet; central Chileen-US
dc.titleFactors that affect the mean size of Chilean hake (Merluccius gayi gayi) caught with gillnets in 2001-2018 in central Chileen-US
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.typeen-US
dc.typees-ES


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