The main channel and river confluences as spawning sites for migratory fishes in the middle Uruguay River
Autor(a) principal: | |
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Data de Publicação: | 2022 |
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=S1679-62252022000300201 |
Resumo: | Abstract Evidence indicates that migratory fish reproduce in the middle Uruguay River, but the location of spawning sites remains unknown. To identify spawning sites in the basin, fish eggs and larvae were sampled monthly between October 2016 and January 2017. The sampling was carried out in three sections along the middle Uruguay River, covering two environments: the main channel and the mouth of tributaries (Comandaí, Ijuí, and Piratinim rivers). A total of 11,519 eggs and 3,211 larvae were captured, belonged to ten migratory species. Eggs and larvae of migratory fishes, were widely distributed, with predominance of segmented eggs, and larvae in yolk-sac and pre-flexion stages, with higher densities near the confluence with the Piratinim River. Larvae assemblages showed spatial variation, indicating that spawning sites differ among migratory species. This study provides new information about fish reproduction in the middle Uruguay River, revealing that migratory species spawn in different localities along the main channel and tributaries. This region may function as a critical site for fish reproduction, although it is currently threatened by the risk of hydropower expansion, emphasizing the need for measures that preserve their environmental conditions, hydrological connectivity and ecological functions. |
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The main channel and river confluences as spawning sites for migratory fishes in the middle Uruguay RiverConservationIchthyoplanktonLotic environmentPotamodromousSpatial patternsAbstract Evidence indicates that migratory fish reproduce in the middle Uruguay River, but the location of spawning sites remains unknown. To identify spawning sites in the basin, fish eggs and larvae were sampled monthly between October 2016 and January 2017. The sampling was carried out in three sections along the middle Uruguay River, covering two environments: the main channel and the mouth of tributaries (Comandaí, Ijuí, and Piratinim rivers). A total of 11,519 eggs and 3,211 larvae were captured, belonged to ten migratory species. Eggs and larvae of migratory fishes, were widely distributed, with predominance of segmented eggs, and larvae in yolk-sac and pre-flexion stages, with higher densities near the confluence with the Piratinim River. Larvae assemblages showed spatial variation, indicating that spawning sites differ among migratory species. This study provides new information about fish reproduction in the middle Uruguay River, revealing that migratory species spawn in different localities along the main channel and tributaries. This region may function as a critical site for fish reproduction, although it is currently threatened by the risk of hydropower expansion, emphasizing the need for measures that preserve their environmental conditions, hydrological connectivity and ecological functions.Sociedade Brasileira de Ictiologia2022-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252022000300201Neotropical Ichthyology v.20 n.3 2022reponame:Neotropical ichthyology (Online)instname:Sociedade Brasileira de Ictiologia (SBI)instacron:SBI10.1590/1982-0224-2021-0094info:eu-repo/semantics/openAccessSoares,Marlon da LuzMassaro,Marthoni ViniciusHartmann,Paula BetinaSiveris,Samuel EliasPelicice,Fernando MayerReynalte-Tataje,David Augustoeng2022-09-09T00:00:00Zoai:scielo:S1679-62252022000300201Revistahttp://www.ufrgs.br/ni/https://old.scielo.br/oai/scielo-oai.php||neoichth@nupelia.uem.br1982-02241679-6225opendoar:2022-09-09T00:00Neotropical ichthyology (Online) - Sociedade Brasileira de Ictiologia (SBI)false |
dc.title.none.fl_str_mv |
The main channel and river confluences as spawning sites for migratory fishes in the middle Uruguay River |
title |
The main channel and river confluences as spawning sites for migratory fishes in the middle Uruguay River |
spellingShingle |
The main channel and river confluences as spawning sites for migratory fishes in the middle Uruguay River Soares,Marlon da Luz Conservation Ichthyoplankton Lotic environment Potamodromous Spatial patterns |
title_short |
The main channel and river confluences as spawning sites for migratory fishes in the middle Uruguay River |
title_full |
The main channel and river confluences as spawning sites for migratory fishes in the middle Uruguay River |
title_fullStr |
The main channel and river confluences as spawning sites for migratory fishes in the middle Uruguay River |
title_full_unstemmed |
The main channel and river confluences as spawning sites for migratory fishes in the middle Uruguay River |
title_sort |
The main channel and river confluences as spawning sites for migratory fishes in the middle Uruguay River |
author |
Soares,Marlon da Luz |
author_facet |
Soares,Marlon da Luz Massaro,Marthoni Vinicius Hartmann,Paula Betina Siveris,Samuel Elias Pelicice,Fernando Mayer Reynalte-Tataje,David Augusto |
author_role |
author |
author2 |
Massaro,Marthoni Vinicius Hartmann,Paula Betina Siveris,Samuel Elias Pelicice,Fernando Mayer Reynalte-Tataje,David Augusto |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Soares,Marlon da Luz Massaro,Marthoni Vinicius Hartmann,Paula Betina Siveris,Samuel Elias Pelicice,Fernando Mayer Reynalte-Tataje,David Augusto |
dc.subject.por.fl_str_mv |
Conservation Ichthyoplankton Lotic environment Potamodromous Spatial patterns |
topic |
Conservation Ichthyoplankton Lotic environment Potamodromous Spatial patterns |
description |
Abstract Evidence indicates that migratory fish reproduce in the middle Uruguay River, but the location of spawning sites remains unknown. To identify spawning sites in the basin, fish eggs and larvae were sampled monthly between October 2016 and January 2017. The sampling was carried out in three sections along the middle Uruguay River, covering two environments: the main channel and the mouth of tributaries (Comandaí, Ijuí, and Piratinim rivers). A total of 11,519 eggs and 3,211 larvae were captured, belonged to ten migratory species. Eggs and larvae of migratory fishes, were widely distributed, with predominance of segmented eggs, and larvae in yolk-sac and pre-flexion stages, with higher densities near the confluence with the Piratinim River. Larvae assemblages showed spatial variation, indicating that spawning sites differ among migratory species. This study provides new information about fish reproduction in the middle Uruguay River, revealing that migratory species spawn in different localities along the main channel and tributaries. This region may function as a critical site for fish reproduction, although it is currently threatened by the risk of hydropower expansion, emphasizing the need for measures that preserve their environmental conditions, hydrological connectivity and ecological functions. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-01-01 |
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=S1679-62252022000300201 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252022000300201 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1982-0224-2021-0094 |
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.20 n.3 2022 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_ |
1752122183940833280 |