Impacts on fisheries assessed by local ecological knowledge in a reservoir cascade in the lower São Francisco River, northeastern Brazil
Autor(a) principal: | |
---|---|
Data de Publicação: | 2021 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Neotropical ichthyology (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000300213 |
Resumo: | Abstract Our study assessed the fishers’ perception (local ecological knowledge, LEK) concerning environmental impacts on fisheries and fish species in the final portion of Sub-Middle and Lower São Francisco. The river was divided into four areas where 107 fishers from 22 locations (4 states) were surveyed. The dam was the most significant impact on fisheries. The loss of connectivity, changing the environmental complexity, and its secondary effects (e.g., flow control, interruption of migratory routes) were determining factors. Other impacts were pointed out, such as pollution, macrophytes, overfishing, non-native species, and aquaculture. Among migratory species, Pseudoplatystoma corruscans and Salminus franciscanus have been absent from fishery catches for decades. Prochilodus argenteus records in fisheries are likely associated with migration routes to small tributaries. The environmental disturbance favored the establishment of non-native species such as Oreochromis niloticus, Cichla monoculus, and Metynnis lippincottianus along the studied section. Over the final portion of the São Francisco River, the more significant seawater intrusion changed the target species for fisheries activities. Thus, our data validate the importance of fishers’ LEK and reinforce the adverse effects of the reservoir cascade on fishing and migratory fishes. |
id |
SBI-1_96924dd6e053bfde6909df543a31df6f |
---|---|
oai_identifier_str |
oai:scielo:S1679-62252021000300213 |
network_acronym_str |
SBI-1 |
network_name_str |
Neotropical ichthyology (Online) |
repository_id_str |
|
spelling |
Impacts on fisheries assessed by local ecological knowledge in a reservoir cascade in the lower São Francisco River, northeastern BrazilAnthropogenic impactsEthnoecologyMigratory fishesNon-native speciesSmall-scale fisheriesAbstract Our study assessed the fishers’ perception (local ecological knowledge, LEK) concerning environmental impacts on fisheries and fish species in the final portion of Sub-Middle and Lower São Francisco. The river was divided into four areas where 107 fishers from 22 locations (4 states) were surveyed. The dam was the most significant impact on fisheries. The loss of connectivity, changing the environmental complexity, and its secondary effects (e.g., flow control, interruption of migratory routes) were determining factors. Other impacts were pointed out, such as pollution, macrophytes, overfishing, non-native species, and aquaculture. Among migratory species, Pseudoplatystoma corruscans and Salminus franciscanus have been absent from fishery catches for decades. Prochilodus argenteus records in fisheries are likely associated with migration routes to small tributaries. The environmental disturbance favored the establishment of non-native species such as Oreochromis niloticus, Cichla monoculus, and Metynnis lippincottianus along the studied section. Over the final portion of the São Francisco River, the more significant seawater intrusion changed the target species for fisheries activities. Thus, our data validate the importance of fishers’ LEK and reinforce the adverse effects of the reservoir cascade on fishing and migratory fishes.Sociedade Brasileira de Ictiologia2021-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000300213Neotropical Ichthyology v.19 n.3 2021reponame:Neotropical ichthyology (Online)instname:Sociedade Brasileira de Ictiologia (SBI)instacron:SBI10.1590/1982-0224-2020-0156info:eu-repo/semantics/openAccessD’avilla,ThiagoCosta-Neto,Eraldo M.Brito,Marcelo F. G.eng2021-10-15T00:00:00Zoai:scielo:S1679-62252021000300213Revistahttp://www.ufrgs.br/ni/https://old.scielo.br/oai/scielo-oai.php||neoichth@nupelia.uem.br1982-02241679-6225opendoar:2021-10-15T00:00Neotropical ichthyology (Online) - Sociedade Brasileira de Ictiologia (SBI)false |
dc.title.none.fl_str_mv |
Impacts on fisheries assessed by local ecological knowledge in a reservoir cascade in the lower São Francisco River, northeastern Brazil |
title |
Impacts on fisheries assessed by local ecological knowledge in a reservoir cascade in the lower São Francisco River, northeastern Brazil |
spellingShingle |
Impacts on fisheries assessed by local ecological knowledge in a reservoir cascade in the lower São Francisco River, northeastern Brazil D’avilla,Thiago Anthropogenic impacts Ethnoecology Migratory fishes Non-native species Small-scale fisheries |
title_short |
Impacts on fisheries assessed by local ecological knowledge in a reservoir cascade in the lower São Francisco River, northeastern Brazil |
title_full |
Impacts on fisheries assessed by local ecological knowledge in a reservoir cascade in the lower São Francisco River, northeastern Brazil |
title_fullStr |
Impacts on fisheries assessed by local ecological knowledge in a reservoir cascade in the lower São Francisco River, northeastern Brazil |
title_full_unstemmed |
Impacts on fisheries assessed by local ecological knowledge in a reservoir cascade in the lower São Francisco River, northeastern Brazil |
title_sort |
Impacts on fisheries assessed by local ecological knowledge in a reservoir cascade in the lower São Francisco River, northeastern Brazil |
author |
D’avilla,Thiago |
author_facet |
D’avilla,Thiago Costa-Neto,Eraldo M. Brito,Marcelo F. G. |
author_role |
author |
author2 |
Costa-Neto,Eraldo M. Brito,Marcelo F. G. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
D’avilla,Thiago Costa-Neto,Eraldo M. Brito,Marcelo F. G. |
dc.subject.por.fl_str_mv |
Anthropogenic impacts Ethnoecology Migratory fishes Non-native species Small-scale fisheries |
topic |
Anthropogenic impacts Ethnoecology Migratory fishes Non-native species Small-scale fisheries |
description |
Abstract Our study assessed the fishers’ perception (local ecological knowledge, LEK) concerning environmental impacts on fisheries and fish species in the final portion of Sub-Middle and Lower São Francisco. The river was divided into four areas where 107 fishers from 22 locations (4 states) were surveyed. The dam was the most significant impact on fisheries. The loss of connectivity, changing the environmental complexity, and its secondary effects (e.g., flow control, interruption of migratory routes) were determining factors. Other impacts were pointed out, such as pollution, macrophytes, overfishing, non-native species, and aquaculture. Among migratory species, Pseudoplatystoma corruscans and Salminus franciscanus have been absent from fishery catches for decades. Prochilodus argenteus records in fisheries are likely associated with migration routes to small tributaries. The environmental disturbance favored the establishment of non-native species such as Oreochromis niloticus, Cichla monoculus, and Metynnis lippincottianus along the studied section. Over the final portion of the São Francisco River, the more significant seawater intrusion changed the target species for fisheries activities. Thus, our data validate the importance of fishers’ LEK and reinforce the adverse effects of the reservoir cascade on fishing and migratory fishes. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000300213 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000300213 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1982-0224-2020-0156 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
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 v.19 n.3 2021 reponame:Neotropical ichthyology (Online) instname:Sociedade Brasileira de Ictiologia (SBI) instacron:SBI |
instname_str |
Sociedade Brasileira de Ictiologia (SBI) |
instacron_str |
SBI |
institution |
SBI |
reponame_str |
Neotropical ichthyology (Online) |
collection |
Neotropical ichthyology (Online) |
repository.name.fl_str_mv |
Neotropical ichthyology (Online) - Sociedade Brasileira de Ictiologia (SBI) |
repository.mail.fl_str_mv |
||neoichth@nupelia.uem.br |
_version_ |
1752122183643037696 |