Population biology of Astyanax lacustris (Pisces, Characiformes) in a Neotropical reservoir and its tributaries
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/0001-3765202120190565 http://hdl.handle.net/11449/211046 |
Resumo: | The aging process of reservoirs has been extensively investigated; however, little is known about how fish populations are adjusted after many years of impoundment. Thus, this study aimed to compare the diet, length-weight relationship, sizes classes, variation in size, and age of Astyanax lacustris Lütken, 1875 collected from lotic and lentic habitats of an aging reservoir. The study group consisted of 730 captured fishes. We found that specimens collected from lotic habitats had a wider range of size classes (1.0 to 12.0 cm), were linked to a high frequency of juveniles (48.7%), and had greater feeding activity (higher stomach fullness). In contrast, fishes collected from lentic environments exhibited high rates of capture (78.4%), increased frequency of adults (87.3%), and higher values of mean standard length. The length-weight relationship indicated that lentic fishes were heavier than fish collected from lotic areas. Moreover, we observed 37 food items in A. lacustris diet, mainly plant material, algae, Cladocera, Hymenoptera, Coleoptera, and Ephemeroptera. Differences among the diet of fishes between sites were evidenced with Permanova (p < 0.05). Astyanax lacustris can be considered a persistent species in Chavantes Reservoir after aging, encountering conditions to complete its life span and adjusting to food resources. |
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Population biology of Astyanax lacustris (Pisces, Characiformes) in a Neotropical reservoir and its tributariesCharacidaenative speciesreservoir agingupper Paraná River basinThe aging process of reservoirs has been extensively investigated; however, little is known about how fish populations are adjusted after many years of impoundment. Thus, this study aimed to compare the diet, length-weight relationship, sizes classes, variation in size, and age of Astyanax lacustris Lütken, 1875 collected from lotic and lentic habitats of an aging reservoir. The study group consisted of 730 captured fishes. We found that specimens collected from lotic habitats had a wider range of size classes (1.0 to 12.0 cm), were linked to a high frequency of juveniles (48.7%), and had greater feeding activity (higher stomach fullness). In contrast, fishes collected from lentic environments exhibited high rates of capture (78.4%), increased frequency of adults (87.3%), and higher values of mean standard length. The length-weight relationship indicated that lentic fishes were heavier than fish collected from lotic areas. Moreover, we observed 37 food items in A. lacustris diet, mainly plant material, algae, Cladocera, Hymenoptera, Coleoptera, and Ephemeroptera. Differences among the diet of fishes between sites were evidenced with Permanova (p < 0.05). Astyanax lacustris can be considered a persistent species in Chavantes Reservoir after aging, encountering conditions to complete its life span and adjusting to food resources.Universidade Estadual de Londrina, Centro de Ciências BiológicasUniversidade Federal de Minas Gerais, Centro de Transposição de PeixesUniversidade Estadual Paulista, Instituto de Biociências de BotucatuUniversidade Estadual Paulista, Instituto de Biociências de BotucatuAcademia Brasileira de CiênciasUniversidade Estadual de LondrinaUniversidade Federal de Minas GeraisUniversidade Estadual Paulista (Unesp)Vidotto-magnoni, Ana P.Kurchevski, GregórioDe Lima, Felipe P. [UNESP]Nobile, André B. [UNESP]Garcia, Diego A.z.Casimiro, Armando C.r.Pereira, Alan D.Orsi, Mário L.2021-07-14T10:18:24Z2021-07-14T10:18:24Z2021-07-07info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article-application/pdfhttp://dx.doi.org/10.1590/0001-3765202120190565Anais da Academia Brasileira de Ciências. Academia Brasileira de Ciências, v. 93, n. 2, p. -, 2021.0001-37651678-2690http://hdl.handle.net/11449/21104610.1590/0001-3765202120190565S0001-37652021000301028S0001-37652021000301028.pdfSciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAnais da Academia Brasileira de Ciênciasinfo:eu-repo/semantics/openAccess2023-10-07T06:04:45Zoai:repositorio.unesp.br:11449/211046Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-10-07T06:04:45Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Population biology of Astyanax lacustris (Pisces, Characiformes) in a Neotropical reservoir and its tributaries |
title |
Population biology of Astyanax lacustris (Pisces, Characiformes) in a Neotropical reservoir and its tributaries |
spellingShingle |
Population biology of Astyanax lacustris (Pisces, Characiformes) in a Neotropical reservoir and its tributaries Vidotto-magnoni, Ana P. Characidae native species reservoir aging upper Paraná River basin |
title_short |
Population biology of Astyanax lacustris (Pisces, Characiformes) in a Neotropical reservoir and its tributaries |
title_full |
Population biology of Astyanax lacustris (Pisces, Characiformes) in a Neotropical reservoir and its tributaries |
title_fullStr |
Population biology of Astyanax lacustris (Pisces, Characiformes) in a Neotropical reservoir and its tributaries |
title_full_unstemmed |
Population biology of Astyanax lacustris (Pisces, Characiformes) in a Neotropical reservoir and its tributaries |
title_sort |
Population biology of Astyanax lacustris (Pisces, Characiformes) in a Neotropical reservoir and its tributaries |
author |
Vidotto-magnoni, Ana P. |
author_facet |
Vidotto-magnoni, Ana P. Kurchevski, Gregório De Lima, Felipe P. [UNESP] Nobile, André B. [UNESP] Garcia, Diego A.z. Casimiro, Armando C.r. Pereira, Alan D. Orsi, Mário L. |
author_role |
author |
author2 |
Kurchevski, Gregório De Lima, Felipe P. [UNESP] Nobile, André B. [UNESP] Garcia, Diego A.z. Casimiro, Armando C.r. Pereira, Alan D. Orsi, Mário L. |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual de Londrina Universidade Federal de Minas Gerais Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Vidotto-magnoni, Ana P. Kurchevski, Gregório De Lima, Felipe P. [UNESP] Nobile, André B. [UNESP] Garcia, Diego A.z. Casimiro, Armando C.r. Pereira, Alan D. Orsi, Mário L. |
dc.subject.por.fl_str_mv |
Characidae native species reservoir aging upper Paraná River basin |
topic |
Characidae native species reservoir aging upper Paraná River basin |
description |
The aging process of reservoirs has been extensively investigated; however, little is known about how fish populations are adjusted after many years of impoundment. Thus, this study aimed to compare the diet, length-weight relationship, sizes classes, variation in size, and age of Astyanax lacustris Lütken, 1875 collected from lotic and lentic habitats of an aging reservoir. The study group consisted of 730 captured fishes. We found that specimens collected from lotic habitats had a wider range of size classes (1.0 to 12.0 cm), were linked to a high frequency of juveniles (48.7%), and had greater feeding activity (higher stomach fullness). In contrast, fishes collected from lentic environments exhibited high rates of capture (78.4%), increased frequency of adults (87.3%), and higher values of mean standard length. The length-weight relationship indicated that lentic fishes were heavier than fish collected from lotic areas. Moreover, we observed 37 food items in A. lacustris diet, mainly plant material, algae, Cladocera, Hymenoptera, Coleoptera, and Ephemeroptera. Differences among the diet of fishes between sites were evidenced with Permanova (p < 0.05). Astyanax lacustris can be considered a persistent species in Chavantes Reservoir after aging, encountering conditions to complete its life span and adjusting to food resources. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-07-14T10:18:24Z 2021-07-14T10:18:24Z 2021-07-07 |
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 |
http://dx.doi.org/10.1590/0001-3765202120190565 Anais da Academia Brasileira de Ciências. Academia Brasileira de Ciências, v. 93, n. 2, p. -, 2021. 0001-3765 1678-2690 http://hdl.handle.net/11449/211046 10.1590/0001-3765202120190565 S0001-37652021000301028 S0001-37652021000301028.pdf |
url |
http://dx.doi.org/10.1590/0001-3765202120190565 http://hdl.handle.net/11449/211046 |
identifier_str_mv |
Anais da Academia Brasileira de Ciências. Academia Brasileira de Ciências, v. 93, n. 2, p. -, 2021. 0001-3765 1678-2690 10.1590/0001-3765202120190565 S0001-37652021000301028 S0001-37652021000301028.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Anais da Academia Brasileira de Ciências |
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.publisher.none.fl_str_mv |
Academia Brasileira de Ciências |
publisher.none.fl_str_mv |
Academia Brasileira de Ciências |
dc.source.none.fl_str_mv |
SciELO reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1797789317171511296 |