Trophic ecology of detritivorous fish along a reservoir cascade in a tropical semi-arid region
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/10.1111/eff.12579 http://hdl.handle.net/11449/205523 |
Resumo: | The objectives of this study were to investigate the food resources consumed by two species of detritivorous fishes along the Apodi-Mossoró River reservoir cascade system, located in the tropical semi-arid region of Brazil. The hypotheses tested were as follows: (a) the diet, niche breadth and niche overlap of the species in the reservoirs downstream of the cascade are different due to the blockage of food resources upstream, and (b) the two species coexist in the reservoir cascade system due to resource partitioning. The diets of the species were analysed based on the volumetric data of the food resources using NMDS ordination, and possible differences in diet were tested with PERMANOVA. The contribution of each food resource was analysed by SIMPER analysis. Trophic niche breadth was evaluated by PERMDISP analysis, and the trophic niche overlap was calculated by the Pianka index. The difference in niche overlap between the reservoirs was evaluated by Welch's t test. Plant material, detritus and sediment were the most important food resources in the diets of the two species, but they differed along the reservoir cascade. Plant material, detritus and sediments were the predominant resources in their diets, which showed differences in feeding, a narrow trophic niche and high dietary overlap. The differences in diet observed along the cascade did not follow the expected pattern, and the narrow trophic niche and high trophic overlap indicate that the sharing of food resources was not the main cause of the coexistence of these species in the reservoirs. |
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Trophic ecology of detritivorous fish along a reservoir cascade in a tropical semi-arid regiondiethydrological connectivityintermittent rivertrophic nicheThe objectives of this study were to investigate the food resources consumed by two species of detritivorous fishes along the Apodi-Mossoró River reservoir cascade system, located in the tropical semi-arid region of Brazil. The hypotheses tested were as follows: (a) the diet, niche breadth and niche overlap of the species in the reservoirs downstream of the cascade are different due to the blockage of food resources upstream, and (b) the two species coexist in the reservoir cascade system due to resource partitioning. The diets of the species were analysed based on the volumetric data of the food resources using NMDS ordination, and possible differences in diet were tested with PERMANOVA. The contribution of each food resource was analysed by SIMPER analysis. Trophic niche breadth was evaluated by PERMDISP analysis, and the trophic niche overlap was calculated by the Pianka index. The difference in niche overlap between the reservoirs was evaluated by Welch's t test. Plant material, detritus and sediment were the most important food resources in the diets of the two species, but they differed along the reservoir cascade. Plant material, detritus and sediments were the predominant resources in their diets, which showed differences in feeding, a narrow trophic niche and high dietary overlap. The differences in diet observed along the cascade did not follow the expected pattern, and the narrow trophic niche and high trophic overlap indicate that the sharing of food resources was not the main cause of the coexistence of these species in the reservoirs.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Apoio à Pesquisa do Rio Grande do NortePostgraduate in Animal Science Federal Rural University of the Semiarid (UFERSA)Federal Institute of Education Science and Technology (IFMA) Carolina CampusCrustacean Biology Ecology and Culture Study Group (NEBECC) Júlio de Mesquita Filho São Paulo State University (UNESP)Department of Biological Sciences State University of Rio Grande do Norte (UERN)Department of Biosciences Universidade Federal Rural do Semiárido (UFERSA)Crustacean Biology Ecology and Culture Study Group (NEBECC) Júlio de Mesquita Filho São Paulo State University (UNESP)CNPq: 309046/2015-7CNPq: 479883/2012-2Fundação de Apoio à Pesquisa do Rio Grande do Norte: 68.0025/2005-7Federal Rural University of the Semiarid (UFERSA)Carolina CampusUniversidade Estadual Paulista (Unesp)State University of Rio Grande do Norte (UERN)Universidade Federal Rural do Semiárido (UFERSA)de Oliveira, Jean Carlos Dantasde Oliveira, Jonnata FernandesMarques, Alexandre de Oliveira [UNESP]Peretti, Danielleda Costa, Rodrigo SilvaNovaes, José Luís Costa2021-06-25T10:16:48Z2021-06-25T10:16:48Z2021-04-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article234-243http://dx.doi.org/10.1111/eff.12579Ecology of Freshwater Fish, v. 30, n. 2, p. 234-243, 2021.1600-06330906-6691http://hdl.handle.net/11449/20552310.1111/eff.125792-s2.0-85096649358Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengEcology of Freshwater Fishinfo:eu-repo/semantics/openAccess2021-10-23T14:48:14Zoai:repositorio.unesp.br:11449/205523Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:11:45.192848Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Trophic ecology of detritivorous fish along a reservoir cascade in a tropical semi-arid region |
title |
Trophic ecology of detritivorous fish along a reservoir cascade in a tropical semi-arid region |
spellingShingle |
Trophic ecology of detritivorous fish along a reservoir cascade in a tropical semi-arid region de Oliveira, Jean Carlos Dantas diet hydrological connectivity intermittent river trophic niche |
title_short |
Trophic ecology of detritivorous fish along a reservoir cascade in a tropical semi-arid region |
title_full |
Trophic ecology of detritivorous fish along a reservoir cascade in a tropical semi-arid region |
title_fullStr |
Trophic ecology of detritivorous fish along a reservoir cascade in a tropical semi-arid region |
title_full_unstemmed |
Trophic ecology of detritivorous fish along a reservoir cascade in a tropical semi-arid region |
title_sort |
Trophic ecology of detritivorous fish along a reservoir cascade in a tropical semi-arid region |
author |
de Oliveira, Jean Carlos Dantas |
author_facet |
de Oliveira, Jean Carlos Dantas de Oliveira, Jonnata Fernandes Marques, Alexandre de Oliveira [UNESP] Peretti, Danielle da Costa, Rodrigo Silva Novaes, José Luís Costa |
author_role |
author |
author2 |
de Oliveira, Jonnata Fernandes Marques, Alexandre de Oliveira [UNESP] Peretti, Danielle da Costa, Rodrigo Silva Novaes, José Luís Costa |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Federal Rural University of the Semiarid (UFERSA) Carolina Campus Universidade Estadual Paulista (Unesp) State University of Rio Grande do Norte (UERN) Universidade Federal Rural do Semiárido (UFERSA) |
dc.contributor.author.fl_str_mv |
de Oliveira, Jean Carlos Dantas de Oliveira, Jonnata Fernandes Marques, Alexandre de Oliveira [UNESP] Peretti, Danielle da Costa, Rodrigo Silva Novaes, José Luís Costa |
dc.subject.por.fl_str_mv |
diet hydrological connectivity intermittent river trophic niche |
topic |
diet hydrological connectivity intermittent river trophic niche |
description |
The objectives of this study were to investigate the food resources consumed by two species of detritivorous fishes along the Apodi-Mossoró River reservoir cascade system, located in the tropical semi-arid region of Brazil. The hypotheses tested were as follows: (a) the diet, niche breadth and niche overlap of the species in the reservoirs downstream of the cascade are different due to the blockage of food resources upstream, and (b) the two species coexist in the reservoir cascade system due to resource partitioning. The diets of the species were analysed based on the volumetric data of the food resources using NMDS ordination, and possible differences in diet were tested with PERMANOVA. The contribution of each food resource was analysed by SIMPER analysis. Trophic niche breadth was evaluated by PERMDISP analysis, and the trophic niche overlap was calculated by the Pianka index. The difference in niche overlap between the reservoirs was evaluated by Welch's t test. Plant material, detritus and sediment were the most important food resources in the diets of the two species, but they differed along the reservoir cascade. Plant material, detritus and sediments were the predominant resources in their diets, which showed differences in feeding, a narrow trophic niche and high dietary overlap. The differences in diet observed along the cascade did not follow the expected pattern, and the narrow trophic niche and high trophic overlap indicate that the sharing of food resources was not the main cause of the coexistence of these species in the reservoirs. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-25T10:16:48Z 2021-06-25T10:16:48Z 2021-04-01 |
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/10.1111/eff.12579 Ecology of Freshwater Fish, v. 30, n. 2, p. 234-243, 2021. 1600-0633 0906-6691 http://hdl.handle.net/11449/205523 10.1111/eff.12579 2-s2.0-85096649358 |
url |
http://dx.doi.org/10.1111/eff.12579 http://hdl.handle.net/11449/205523 |
identifier_str_mv |
Ecology of Freshwater Fish, v. 30, n. 2, p. 234-243, 2021. 1600-0633 0906-6691 10.1111/eff.12579 2-s2.0-85096649358 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Ecology of Freshwater Fish |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
234-243 |
dc.source.none.fl_str_mv |
Scopus 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 |
|
_version_ |
1808128770111963136 |