Urban market amplifies strong species selectivity in Amazonian artisanal fisheries
Autor(a) principal: | |
---|---|
Data de Publicação: | 2021 |
Outros Autores: | , , |
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. |
id |
UFLA_c422b12801484452b00e4586a1e63783 |
---|---|
oai_identifier_str |
oai:localhost:1/50252 |
network_acronym_str |
UFLA |
network_name_str |
Repositório Institucional da UFLA |
repository_id_str |
|
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 |
_version_ |
1815439347850149888 |