Urban market amplifies strong species selectivity in Amazonian artisanal fisheries

Detalhes bibliográficos
Autor(a) principal: Tregidgo, Daniel
Data de Publicação: 2021
Outros Autores: Parry, Luke, Barlow, Jos, Pompeu, Paulo S.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/50252
Resumo: Despite Amazonia possessing the highest freshwater biodiversity on Earth, urban landing data show how huge fishing pressure is placed on only a dozen species. However, truly characterising the fishery and understanding the drivers of species selectivity is challenging, given the neglect of artisanal fishing activity, who may catch most of the Amazon’s fish. We register the catch of 824 fishing trips by interviewing artisanal fishers in their rural riverside communities. We use these data to characterise the artisanal fishery of the Rio Purus, the main fish source sub-system for the Amazon’s largest city (Manaus), and investigate the factors determining catch composition. Fishers caught 80 fish species, yet just four species made up over half of the harvested biomass. Urban markets appear to drive greater selectivity, with a significantly lower species diversity in commercial compared to subsistence catches. Fish catch composition varied significantly both seasonally and with geographical remoteness from Manaus. The spatial turnover in catch composition appears to be driven by urban access, with more commercially important species dominating where Manaus-based fish-buyers frequent. Our data may partially explain observed overfishing in some commercially important species, particularly as most Amazonians now live in urban areas.
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spelling Urban market amplifies strong species selectivity in Amazonian artisanal fisheriesFlood pulseOverfishingSpecies diversityUrbanizationDiversidade de espéciesPulso de inundaçãoSobrepescaUrbanizaçãoDespite Amazonia possessing the highest freshwater biodiversity on Earth, urban landing data show how huge fishing pressure is placed on only a dozen species. However, truly characterising the fishery and understanding the drivers of species selectivity is challenging, given the neglect of artisanal fishing activity, who may catch most of the Amazon’s fish. We register the catch of 824 fishing trips by interviewing artisanal fishers in their rural riverside communities. We use these data to characterise the artisanal fishery of the Rio Purus, the main fish source sub-system for the Amazon’s largest city (Manaus), and investigate the factors determining catch composition. Fishers caught 80 fish species, yet just four species made up over half of the harvested biomass. Urban markets appear to drive greater selectivity, with a significantly lower species diversity in commercial compared to subsistence catches. Fish catch composition varied significantly both seasonally and with geographical remoteness from Manaus. The spatial turnover in catch composition appears to be driven by urban access, with more commercially important species dominating where Manaus-based fish-buyers frequent. Our data may partially explain observed overfishing in some commercially important species, particularly as most Amazonians now live in urban areas.Apesar da Amazônia possuir a maior biodiversidade de água doce do mundo, dados de desembarques urbanos mostram como a grande pressão da pesca é focada em apenas uma dúzia de espécies. Entretanto, caracterizar a pesca e entender as causas da seletividade das espécies é desafiador pela pesca artesanal, que pode capturar a maioria dos peixes da Amazônia, ser negligenciada. Registramos as capturas de 824 pescarias entrevistando pescadores artesanais em suas comunidades ribeirinhas. Usamos esses dados para caracterizar a pesca artesanal do rio Purus, o principal subsistema de origem do pescado para a maior cidade da Amazônia (Manaus), e investigamos os fatores que determinam a composição das capturas. Os pescadores capturaram 80 espécies de peixes, e apenas quatro representaram mais da metade da biomassa. Os mercados urbanos parecem direcionar maior seletividade, com diversidade de espécies significativamente menor nas capturas comerciais que nas de subsistência. A composição do pescado variou significativamente tanto sazonalmente quanto com o afastamento geográfico de Manaus. A substituição espacial na composição das capturas parece ser direcionada pelo acesso urbano, com espécies comercialmente importantes dominando onde os compradores de peixes de Manaus frequentam. Nossos dados podem explicar parcialmente a sobrepesca observada de algumas espécies comercialmente importantes, particularmente porque a maioria da população da Amazônia vive atualmente em áreas urbanas.Sociedade Brasileira de Ictiologia2022-06-15T19:42:05Z2022-06-15T19:42:05Z2021info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfTREGIDGO, D. et al. Urban market amplifies strong species selectivity in Amazonian artisanal fisheries. Neotropical Ichthyology, Porto Alegre, v. 19, n. 3, e210097, 2021. DOI: 10.1590/1982-0224-2021-0097.http://repositorio.ufla.br/jspui/handle/1/50252Neotropical Ichthyologyreponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessTregidgo, DanielParry, LukeBarlow, JosPompeu, Paulo S.eng2022-06-15T19:42:05Zoai:localhost:1/50252Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2022-06-15T19:42:05Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Urban market amplifies strong species selectivity in Amazonian artisanal fisheries
title Urban market amplifies strong species selectivity in Amazonian artisanal fisheries
spellingShingle Urban market amplifies strong species selectivity in Amazonian artisanal fisheries
Tregidgo, Daniel
Flood pulse
Overfishing
Species diversity
Urbanization
Diversidade de espécies
Pulso de inundação
Sobrepesca
Urbanização
title_short Urban market amplifies strong species selectivity in Amazonian artisanal fisheries
title_full Urban market amplifies strong species selectivity in Amazonian artisanal fisheries
title_fullStr Urban market amplifies strong species selectivity in Amazonian artisanal fisheries
title_full_unstemmed Urban market amplifies strong species selectivity in Amazonian artisanal fisheries
title_sort Urban market amplifies strong species selectivity in Amazonian artisanal fisheries
author Tregidgo, Daniel
author_facet Tregidgo, Daniel
Parry, Luke
Barlow, Jos
Pompeu, Paulo S.
author_role author
author2 Parry, Luke
Barlow, Jos
Pompeu, Paulo S.
author2_role author
author
author
dc.contributor.author.fl_str_mv Tregidgo, Daniel
Parry, Luke
Barlow, Jos
Pompeu, Paulo S.
dc.subject.por.fl_str_mv Flood pulse
Overfishing
Species diversity
Urbanization
Diversidade de espécies
Pulso de inundação
Sobrepesca
Urbanização
topic Flood pulse
Overfishing
Species diversity
Urbanization
Diversidade de espécies
Pulso de inundação
Sobrepesca
Urbanização
description Despite Amazonia possessing the highest freshwater biodiversity on Earth, urban landing data show how huge fishing pressure is placed on only a dozen species. However, truly characterising the fishery and understanding the drivers of species selectivity is challenging, given the neglect of artisanal fishing activity, who may catch most of the Amazon’s fish. We register the catch of 824 fishing trips by interviewing artisanal fishers in their rural riverside communities. We use these data to characterise the artisanal fishery of the Rio Purus, the main fish source sub-system for the Amazon’s largest city (Manaus), and investigate the factors determining catch composition. Fishers caught 80 fish species, yet just four species made up over half of the harvested biomass. Urban markets appear to drive greater selectivity, with a significantly lower species diversity in commercial compared to subsistence catches. Fish catch composition varied significantly both seasonally and with geographical remoteness from Manaus. The spatial turnover in catch composition appears to be driven by urban access, with more commercially important species dominating where Manaus-based fish-buyers frequent. Our data may partially explain observed overfishing in some commercially important species, particularly as most Amazonians now live in urban areas.
publishDate 2021
dc.date.none.fl_str_mv 2021
2022-06-15T19:42:05Z
2022-06-15T19:42:05Z
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 TREGIDGO, D. et al. Urban market amplifies strong species selectivity in Amazonian artisanal fisheries. Neotropical Ichthyology, Porto Alegre, v. 19, n. 3, e210097, 2021. DOI: 10.1590/1982-0224-2021-0097.
http://repositorio.ufla.br/jspui/handle/1/50252
identifier_str_mv TREGIDGO, D. et al. Urban market amplifies strong species selectivity in Amazonian artisanal fisheries. Neotropical Ichthyology, Porto Alegre, v. 19, n. 3, e210097, 2021. DOI: 10.1590/1982-0224-2021-0097.
url http://repositorio.ufla.br/jspui/handle/1/50252
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Sociedade Brasileira de Ictiologia
publisher.none.fl_str_mv Sociedade Brasileira de Ictiologia
dc.source.none.fl_str_mv Neotropical Ichthyology
reponame:Repositório Institucional da UFLA
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
instacron_str UFLA
institution UFLA
reponame_str Repositório Institucional da UFLA
collection Repositório Institucional da UFLA
repository.name.fl_str_mv Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)
repository.mail.fl_str_mv nivaldo@ufla.br || repositorio.biblioteca@ufla.br
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