Hydropeaking effects of on the diet of a neotropical fish community
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFLA |
Texto Completo: | http://repositorio.ufla.br/jspui/handle/1/39584 |
Resumo: | The impact of hydropeaking by dams is still poorly understood. Studying the diet of fish subjected to that variation allows us to test the following hypotheses: 1) seasonal and daily changes in river flow, causes changes in the use of the feeding resources; 2) species presenting larger differences in diet between seasons will be those with larger diet changes due to hydropeaking; 3) hydropeaking effects will be more evident in species feeding on items that can be more affected by variable flows. Fish diet collected from the Grande River, downstream from Itutinga Dam, in January and July 2010, was characterized by the feeding index (IA). NMDS, ANOSIM and SIMPER analyses were used to compare the diets under different hydropeaking and season. Relationship among diet dissimilarity between treatments was tested using Pearson Correlation. Seasonality and flow effects were not resulted in changes in the diet of species (hypothesis 1 rejected). In July, there was correlation of differences in the diet between stable and hydropeaking periods with the divergence caused by seasonality (hypothesis 2 accepted). The invertivores guild was the most affected by hydropeaking effects (hypothesis 3 accepted). This is the first study in Brazil that evaluates hydropeaking effects on ichthyofauna. |
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Hydropeaking effects of on the diet of a neotropical fish communityDifferences in dietFlow fluctuationRio Grande fishInvertivorousSeasonalityGrande river (Brazil)The impact of hydropeaking by dams is still poorly understood. Studying the diet of fish subjected to that variation allows us to test the following hypotheses: 1) seasonal and daily changes in river flow, causes changes in the use of the feeding resources; 2) species presenting larger differences in diet between seasons will be those with larger diet changes due to hydropeaking; 3) hydropeaking effects will be more evident in species feeding on items that can be more affected by variable flows. Fish diet collected from the Grande River, downstream from Itutinga Dam, in January and July 2010, was characterized by the feeding index (IA). NMDS, ANOSIM and SIMPER analyses were used to compare the diets under different hydropeaking and season. Relationship among diet dissimilarity between treatments was tested using Pearson Correlation. Seasonality and flow effects were not resulted in changes in the diet of species (hypothesis 1 rejected). In July, there was correlation of differences in the diet between stable and hydropeaking periods with the divergence caused by seasonality (hypothesis 2 accepted). The invertivores guild was the most affected by hydropeaking effects (hypothesis 3 accepted). This is the first study in Brazil that evaluates hydropeaking effects on ichthyofauna.Sociedade Brasileira de Ictiologia (SBI)2020-03-31T13:42:33Z2020-03-31T13:42:33Z2014-12info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfGANDINI, C. V.; SAMPAIO, F. A. C.; POMPEU, P. S. Hydropeaking effects of on the diet of a neotropical fish community. Neotropical Ichthyology, [S.l.], v. 12, n. 4, p. 795-802, Dez. 2014. DOI: 10.1590/1982-0224-20130151.http://repositorio.ufla.br/jspui/handle/1/39584Neotropical Ichthyologyreponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAAttribution-NonCommercial 4.0 Internationalhttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccessGandini, Cíntia VelosoSampaio, Francisco Alexandre CostaPompeu, Paulo Santoseng2020-03-31T13:42:33Zoai:localhost:1/39584Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2020-03-31T13:42:33Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false |
dc.title.none.fl_str_mv |
Hydropeaking effects of on the diet of a neotropical fish community |
title |
Hydropeaking effects of on the diet of a neotropical fish community |
spellingShingle |
Hydropeaking effects of on the diet of a neotropical fish community Gandini, Cíntia Veloso Differences in diet Flow fluctuation Rio Grande fish Invertivorous Seasonality Grande river (Brazil) |
title_short |
Hydropeaking effects of on the diet of a neotropical fish community |
title_full |
Hydropeaking effects of on the diet of a neotropical fish community |
title_fullStr |
Hydropeaking effects of on the diet of a neotropical fish community |
title_full_unstemmed |
Hydropeaking effects of on the diet of a neotropical fish community |
title_sort |
Hydropeaking effects of on the diet of a neotropical fish community |
author |
Gandini, Cíntia Veloso |
author_facet |
Gandini, Cíntia Veloso Sampaio, Francisco Alexandre Costa Pompeu, Paulo Santos |
author_role |
author |
author2 |
Sampaio, Francisco Alexandre Costa Pompeu, Paulo Santos |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Gandini, Cíntia Veloso Sampaio, Francisco Alexandre Costa Pompeu, Paulo Santos |
dc.subject.por.fl_str_mv |
Differences in diet Flow fluctuation Rio Grande fish Invertivorous Seasonality Grande river (Brazil) |
topic |
Differences in diet Flow fluctuation Rio Grande fish Invertivorous Seasonality Grande river (Brazil) |
description |
The impact of hydropeaking by dams is still poorly understood. Studying the diet of fish subjected to that variation allows us to test the following hypotheses: 1) seasonal and daily changes in river flow, causes changes in the use of the feeding resources; 2) species presenting larger differences in diet between seasons will be those with larger diet changes due to hydropeaking; 3) hydropeaking effects will be more evident in species feeding on items that can be more affected by variable flows. Fish diet collected from the Grande River, downstream from Itutinga Dam, in January and July 2010, was characterized by the feeding index (IA). NMDS, ANOSIM and SIMPER analyses were used to compare the diets under different hydropeaking and season. Relationship among diet dissimilarity between treatments was tested using Pearson Correlation. Seasonality and flow effects were not resulted in changes in the diet of species (hypothesis 1 rejected). In July, there was correlation of differences in the diet between stable and hydropeaking periods with the divergence caused by seasonality (hypothesis 2 accepted). The invertivores guild was the most affected by hydropeaking effects (hypothesis 3 accepted). This is the first study in Brazil that evaluates hydropeaking effects on ichthyofauna. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-12 2020-03-31T13:42:33Z 2020-03-31T13:42:33Z |
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 |
GANDINI, C. V.; SAMPAIO, F. A. C.; POMPEU, P. S. Hydropeaking effects of on the diet of a neotropical fish community. Neotropical Ichthyology, [S.l.], v. 12, n. 4, p. 795-802, Dez. 2014. DOI: 10.1590/1982-0224-20130151. http://repositorio.ufla.br/jspui/handle/1/39584 |
identifier_str_mv |
GANDINI, C. V.; SAMPAIO, F. A. C.; POMPEU, P. S. Hydropeaking effects of on the diet of a neotropical fish community. Neotropical Ichthyology, [S.l.], v. 12, n. 4, p. 795-802, Dez. 2014. DOI: 10.1590/1982-0224-20130151. |
url |
http://repositorio.ufla.br/jspui/handle/1/39584 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
Attribution-NonCommercial 4.0 International http://creativecommons.org/licenses/by-nc/4.0/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial 4.0 International http://creativecommons.org/licenses/by-nc/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 (SBI) |
publisher.none.fl_str_mv |
Sociedade Brasileira de Ictiologia (SBI) |
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_ |
1784550193030496256 |