Assessing the diet and trophic niche breadth of an omnivorous fish (Glanidium ribeiroi) in subtropical lotic environments: Intraspecific and ontogenic responses to spatial variations

Detalhes bibliográficos
Autor(a) principal: Kliemann, B. C.K. [UNESP]
Data de Publicação: 2019
Outros Autores: Baldasso, M. C., Pini, S. F.R., Makrakis, M. C., Makrakis, S., Delariva, R. L.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1071/MF18149
http://hdl.handle.net/11449/188963
Resumo: The diet of Glanidium ribeiroi was investigated in lotic stretches downstream from a cascade of reservoirs to determine how it responds to intraspecific and environmental variations. Monthly sampling was performed from 2013 to 2016 at sites including the main channel of the Iguaçu River and tributaries in preserved basins and agricultural land. The diet of individuals in the preserved tributaries was primarily associated with allochthonous resources, whereas in the non-preserved tributaries and main channel the diets were primarily associated with autochthonous resources. Trophic niche breadth and intraspecific variability differed significantly among sampling areas and size classes. Trophic niche overlap among size classes and sampling areas was low. Positive and negative relationships between the trophic niche breadth and the standard length of individuals were also found in different sampling areas. Intraspecific and ontogenic variations were strongly and consistently associated with forest cover. Individuals responded differently to local environmental variations due to differences in landscape gradients and life cycle changes. Therefore, the effects of spatial heterogeneity on diet composition and intraspecific variations therein appear to be crucial to the success of the populations evaluated. These results may help with the implementation of conservation measures for this and other endemic species.
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spelling Assessing the diet and trophic niche breadth of an omnivorous fish (Glanidium ribeiroi) in subtropical lotic environments: Intraspecific and ontogenic responses to spatial variationsallochthonous resourcesfeedingfish freshwaterpreserved areastrophic segregationThe diet of Glanidium ribeiroi was investigated in lotic stretches downstream from a cascade of reservoirs to determine how it responds to intraspecific and environmental variations. Monthly sampling was performed from 2013 to 2016 at sites including the main channel of the Iguaçu River and tributaries in preserved basins and agricultural land. The diet of individuals in the preserved tributaries was primarily associated with allochthonous resources, whereas in the non-preserved tributaries and main channel the diets were primarily associated with autochthonous resources. Trophic niche breadth and intraspecific variability differed significantly among sampling areas and size classes. Trophic niche overlap among size classes and sampling areas was low. Positive and negative relationships between the trophic niche breadth and the standard length of individuals were also found in different sampling areas. Intraspecific and ontogenic variations were strongly and consistently associated with forest cover. Individuals responded differently to local environmental variations due to differences in landscape gradients and life cycle changes. Therefore, the effects of spatial heterogeneity on diet composition and intraspecific variations therein appear to be crucial to the success of the populations evaluated. These results may help with the implementation of conservation measures for this and other endemic species.Universidade Estadual Paulista (UNESP) Instituto de Biociências Botucatu Programa de Pós Graduação em Ciências Biológicas-Zoologia, Rua Prof. Dr Antônio Celso Wagner Zanin, 250Universidade Estadual Do Oeste Do Paraná Programa de Pos Graduacao em Conservacao e Manejo de Recursos Naturais, Rua Universitária, 2069Universidade Estadual Do Oeste Do Paraná Programa de Pós-graduação em Engenharia de Pesca, Rua Miraldo Pedro Zibetti, 385Universidade Estadual Do Oeste Do Paraná Grupo de Pesquisa em Tecnologia em Ecohidraulica e Conservacao de Recursos Pesqueiros e Hidricos, Rua Miraldo Pedro Zibetti, 385Universidade Estadual Paulista (UNESP) Instituto de Biociências Botucatu Programa de Pós Graduação em Ciências Biológicas-Zoologia, Rua Prof. Dr Antônio Celso Wagner Zanin, 250Universidade Estadual Paulista (Unesp)Programa de Pos Graduacao em Conservacao e Manejo de Recursos NaturaisPrograma de Pós-graduação em Engenharia de PescaGrupo de Pesquisa em Tecnologia em Ecohidraulica e Conservacao de Recursos Pesqueiros e HidricosKliemann, B. C.K. [UNESP]Baldasso, M. C.Pini, S. F.R.Makrakis, M. C.Makrakis, S.Delariva, R. L.2019-10-06T16:25:24Z2019-10-06T16:25:24Z2019-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1116-1128http://dx.doi.org/10.1071/MF18149Marine and Freshwater Research, v. 70, n. 8, p. 1116-1128, 2019.1323-1650http://hdl.handle.net/11449/18896310.1071/MF181492-s2.0-85064217215Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMarine and Freshwater Researchinfo:eu-repo/semantics/openAccess2021-10-23T20:18:34Zoai:repositorio.unesp.br:11449/188963Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T20:18:34Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Assessing the diet and trophic niche breadth of an omnivorous fish (Glanidium ribeiroi) in subtropical lotic environments: Intraspecific and ontogenic responses to spatial variations
title Assessing the diet and trophic niche breadth of an omnivorous fish (Glanidium ribeiroi) in subtropical lotic environments: Intraspecific and ontogenic responses to spatial variations
spellingShingle Assessing the diet and trophic niche breadth of an omnivorous fish (Glanidium ribeiroi) in subtropical lotic environments: Intraspecific and ontogenic responses to spatial variations
Kliemann, B. C.K. [UNESP]
allochthonous resources
feeding
fish freshwater
preserved areas
trophic segregation
title_short Assessing the diet and trophic niche breadth of an omnivorous fish (Glanidium ribeiroi) in subtropical lotic environments: Intraspecific and ontogenic responses to spatial variations
title_full Assessing the diet and trophic niche breadth of an omnivorous fish (Glanidium ribeiroi) in subtropical lotic environments: Intraspecific and ontogenic responses to spatial variations
title_fullStr Assessing the diet and trophic niche breadth of an omnivorous fish (Glanidium ribeiroi) in subtropical lotic environments: Intraspecific and ontogenic responses to spatial variations
title_full_unstemmed Assessing the diet and trophic niche breadth of an omnivorous fish (Glanidium ribeiroi) in subtropical lotic environments: Intraspecific and ontogenic responses to spatial variations
title_sort Assessing the diet and trophic niche breadth of an omnivorous fish (Glanidium ribeiroi) in subtropical lotic environments: Intraspecific and ontogenic responses to spatial variations
author Kliemann, B. C.K. [UNESP]
author_facet Kliemann, B. C.K. [UNESP]
Baldasso, M. C.
Pini, S. F.R.
Makrakis, M. C.
Makrakis, S.
Delariva, R. L.
author_role author
author2 Baldasso, M. C.
Pini, S. F.R.
Makrakis, M. C.
Makrakis, S.
Delariva, R. L.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Programa de Pos Graduacao em Conservacao e Manejo de Recursos Naturais
Programa de Pós-graduação em Engenharia de Pesca
Grupo de Pesquisa em Tecnologia em Ecohidraulica e Conservacao de Recursos Pesqueiros e Hidricos
dc.contributor.author.fl_str_mv Kliemann, B. C.K. [UNESP]
Baldasso, M. C.
Pini, S. F.R.
Makrakis, M. C.
Makrakis, S.
Delariva, R. L.
dc.subject.por.fl_str_mv allochthonous resources
feeding
fish freshwater
preserved areas
trophic segregation
topic allochthonous resources
feeding
fish freshwater
preserved areas
trophic segregation
description The diet of Glanidium ribeiroi was investigated in lotic stretches downstream from a cascade of reservoirs to determine how it responds to intraspecific and environmental variations. Monthly sampling was performed from 2013 to 2016 at sites including the main channel of the Iguaçu River and tributaries in preserved basins and agricultural land. The diet of individuals in the preserved tributaries was primarily associated with allochthonous resources, whereas in the non-preserved tributaries and main channel the diets were primarily associated with autochthonous resources. Trophic niche breadth and intraspecific variability differed significantly among sampling areas and size classes. Trophic niche overlap among size classes and sampling areas was low. Positive and negative relationships between the trophic niche breadth and the standard length of individuals were also found in different sampling areas. Intraspecific and ontogenic variations were strongly and consistently associated with forest cover. Individuals responded differently to local environmental variations due to differences in landscape gradients and life cycle changes. Therefore, the effects of spatial heterogeneity on diet composition and intraspecific variations therein appear to be crucial to the success of the populations evaluated. These results may help with the implementation of conservation measures for this and other endemic species.
publishDate 2019
dc.date.none.fl_str_mv 2019-10-06T16:25:24Z
2019-10-06T16:25:24Z
2019-01-01
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/10.1071/MF18149
Marine and Freshwater Research, v. 70, n. 8, p. 1116-1128, 2019.
1323-1650
http://hdl.handle.net/11449/188963
10.1071/MF18149
2-s2.0-85064217215
url http://dx.doi.org/10.1071/MF18149
http://hdl.handle.net/11449/188963
identifier_str_mv Marine and Freshwater Research, v. 70, n. 8, p. 1116-1128, 2019.
1323-1650
10.1071/MF18149
2-s2.0-85064217215
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Marine and Freshwater Research
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 1116-1128
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_ 1799965741593657344

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