Decision analysis on the introduction of a new fishing fleet for skipjack tuna in the Southwest Atlantic

Detalhes bibliográficos
Autor(a) principal: Andrade, Humber Agrelli
Data de Publicação: 2007
Outros Autores: Kinas, Paul Gerhard
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da FURG (RI FURG)
Texto Completo: http://repositorio.furg.br/handle/1/922
Resumo: Usually fishery managers do not have complete information on the questions they are supposed to evaluate, hence they have to make decisions taking risks because of the underlying uncertainty. We used decision theory and a bayesian version of a biomass dynamic model to assess the problem of introducing a new purse-seine fleet in the skipjack tuna (Katsuwonus pelamis) fishery of the southwest Atlantic ocean (SWAO). Adaptive importance sampling (AIS) followed by the sampling importance resampling (SIR) were used to build and explore the posterior distributions. Because skipjack of the SWAO has been under-exploited increasing the catches by introducing purse-seine boats probably will not reduce too much the biomass. However the endorsement of purse-seine fishing days results in large economic risks for the traditional bait-boat fleet.
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spelling Decision analysis on the introduction of a new fishing fleet for skipjack tuna in the Southwest AtlanticAnálise de decisão sobre a introdução de uma nova frota pesqueiraUuncertaintyPosterior probabilitySkipjack tunaAdaptive importance samplingBayesian analysisIncertezaProbabilidade a posterioriBonito-listradoAmostragem adaptativa ponderadaAnálise bayesianaUsually fishery managers do not have complete information on the questions they are supposed to evaluate, hence they have to make decisions taking risks because of the underlying uncertainty. We used decision theory and a bayesian version of a biomass dynamic model to assess the problem of introducing a new purse-seine fleet in the skipjack tuna (Katsuwonus pelamis) fishery of the southwest Atlantic ocean (SWAO). Adaptive importance sampling (AIS) followed by the sampling importance resampling (SIR) were used to build and explore the posterior distributions. Because skipjack of the SWAO has been under-exploited increasing the catches by introducing purse-seine boats probably will not reduce too much the biomass. However the endorsement of purse-seine fishing days results in large economic risks for the traditional bait-boat fleet.Usualmente administradores pesqueiros não dispõem de todas as informações sobre as questões a serem avaliadas, e dessa forma eles têm que tomar decisões assumindo alguns riscos por conta das incertezas. Nós fizemos uso da teoria de decisão e de uma versão bayesiana de um modelo dinâmico de biomassa para avaliar o problema sobre a introdução de uma nova frota de cerco na pescaria do bonito-listrado (Katsuwonus pelamis) no sudoeste do oceano Atlântico (SWOA). Uma amostragem adaptativa ponderada (AAP) seguida de uma amostragem e reamostragem ponderada (ARP) foram utilizadas para a construção e exploração da distribuição posteriori. O bonito do SWOA pode ser considerado sub-explorado no sentido de que aumentos das capturas com a introdução do cerco provavelmente não reduziriam muito a biomassa. Entretanto a permissão de pesca para barcos de cerco resultaria em grandes riscos econômicos para a frota de pesca tradicional de vara-e-isca-viva.2011-08-24T04:34:51Z2011-08-24T04:34:51Z2007info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfANDRADE, Humber A.; KINAS, Paul G. Decision analysis on the introduction of a new fishing fleet for skipjack tuna in the Southwest Atlantic. Pan-American Journal of Aquatic Sciences, v. 2, n. 2, p. 131-148, 2007. Disponível em: <http://www.panamjas.org/pdf_artigos/PANAMJAS_2%282%29_131-148.pdf> Acesso em: 24 ago. 2011.http://repositorio.furg.br/handle/1/922engAndrade, Humber AgrelliKinas, Paul Gerhardinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da FURG (RI FURG)instname:Universidade Federal do Rio Grande (FURG)instacron:FURG2011-08-24T04:34:51Zoai:repositorio.furg.br:1/922Repositório InstitucionalPUBhttps://repositorio.furg.br/oai/request || http://200.19.254.174/oai/requestopendoar:2011-08-24T04:34:51Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)false
dc.title.none.fl_str_mv Decision analysis on the introduction of a new fishing fleet for skipjack tuna in the Southwest Atlantic
Análise de decisão sobre a introdução de uma nova frota pesqueira
title Decision analysis on the introduction of a new fishing fleet for skipjack tuna in the Southwest Atlantic
spellingShingle Decision analysis on the introduction of a new fishing fleet for skipjack tuna in the Southwest Atlantic
Andrade, Humber Agrelli
Uuncertainty
Posterior probability
Skipjack tuna
Adaptive importance sampling
Bayesian analysis
Incerteza
Probabilidade a posteriori
Bonito-listrado
Amostragem adaptativa ponderada
Análise bayesiana
title_short Decision analysis on the introduction of a new fishing fleet for skipjack tuna in the Southwest Atlantic
title_full Decision analysis on the introduction of a new fishing fleet for skipjack tuna in the Southwest Atlantic
title_fullStr Decision analysis on the introduction of a new fishing fleet for skipjack tuna in the Southwest Atlantic
title_full_unstemmed Decision analysis on the introduction of a new fishing fleet for skipjack tuna in the Southwest Atlantic
title_sort Decision analysis on the introduction of a new fishing fleet for skipjack tuna in the Southwest Atlantic
author Andrade, Humber Agrelli
author_facet Andrade, Humber Agrelli
Kinas, Paul Gerhard
author_role author
author2 Kinas, Paul Gerhard
author2_role author
dc.contributor.author.fl_str_mv Andrade, Humber Agrelli
Kinas, Paul Gerhard
dc.subject.por.fl_str_mv Uuncertainty
Posterior probability
Skipjack tuna
Adaptive importance sampling
Bayesian analysis
Incerteza
Probabilidade a posteriori
Bonito-listrado
Amostragem adaptativa ponderada
Análise bayesiana
topic Uuncertainty
Posterior probability
Skipjack tuna
Adaptive importance sampling
Bayesian analysis
Incerteza
Probabilidade a posteriori
Bonito-listrado
Amostragem adaptativa ponderada
Análise bayesiana
description Usually fishery managers do not have complete information on the questions they are supposed to evaluate, hence they have to make decisions taking risks because of the underlying uncertainty. We used decision theory and a bayesian version of a biomass dynamic model to assess the problem of introducing a new purse-seine fleet in the skipjack tuna (Katsuwonus pelamis) fishery of the southwest Atlantic ocean (SWAO). Adaptive importance sampling (AIS) followed by the sampling importance resampling (SIR) were used to build and explore the posterior distributions. Because skipjack of the SWAO has been under-exploited increasing the catches by introducing purse-seine boats probably will not reduce too much the biomass. However the endorsement of purse-seine fishing days results in large economic risks for the traditional bait-boat fleet.
publishDate 2007
dc.date.none.fl_str_mv 2007
2011-08-24T04:34:51Z
2011-08-24T04:34:51Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv ANDRADE, Humber A.; KINAS, Paul G. Decision analysis on the introduction of a new fishing fleet for skipjack tuna in the Southwest Atlantic. Pan-American Journal of Aquatic Sciences, v. 2, n. 2, p. 131-148, 2007. Disponível em: <http://www.panamjas.org/pdf_artigos/PANAMJAS_2%282%29_131-148.pdf> Acesso em: 24 ago. 2011.
http://repositorio.furg.br/handle/1/922
identifier_str_mv ANDRADE, Humber A.; KINAS, Paul G. Decision analysis on the introduction of a new fishing fleet for skipjack tuna in the Southwest Atlantic. Pan-American Journal of Aquatic Sciences, v. 2, n. 2, p. 131-148, 2007. Disponível em: <http://www.panamjas.org/pdf_artigos/PANAMJAS_2%282%29_131-148.pdf> Acesso em: 24 ago. 2011.
url http://repositorio.furg.br/handle/1/922
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Institucional da FURG (RI FURG)
instname:Universidade Federal do Rio Grande (FURG)
instacron:FURG
instname_str Universidade Federal do Rio Grande (FURG)
instacron_str FURG
institution FURG
reponame_str Repositório Institucional da FURG (RI FURG)
collection Repositório Institucional da FURG (RI FURG)
repository.name.fl_str_mv Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)
repository.mail.fl_str_mv
_version_ 1807384397069942784

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