Alimentación de Characidium rachovii (Characiformes: Crenuchidae) y Pyrrhulina australis (Characiformes: Lebiasinidae) en lagunas someras de la provincia de Corrientes, Argentina
- Autores
- Ibarra Polesel, Mario Gabriel; Poi, Alicia Susana G.
- Año de publicación
- 2016
- Idioma
- español castellano
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Feeding of Characidium rachovii (Characiformes: Crenuchidae) and Pyrrhulina australis (Characiformes: Lebiasinidae) in shallow lakes of Corrientes, Argentina. Fishes display diverse feeding strategies that may undergo modifications through ontogeny or seasonally with ecological implications in the food webs. Even though the significance of fishes as top predators is recognized, the diet of many of them is still scarcely known; especially in fish that inhabit shallow lakes densely vegetated. The aim of this study was to investigate the diet of Characidium rachovii and Pyrrhulina australis of different sizes classes (I, II and III); during winter and summer and estimate their trophic niche breadth. The field work was carried out in two shallow lakes fed by rain (Soto and Pampin lake, Corrientes province), from July 2011 to August 2012. The stomach contents of 104 individuals of C. rachovii and 91 specimens of P. australis were examined. Accumulation curve showed that the number of analyzed stomachs was representative for both species. Twenty three food items for C. rachovii and twenty eight for P. australis were recognized in the gut contents. According to the index of relative importance (IRI), both species feed preferably on cladocerans and midges (Chironomidae), and both species showed a large overlap in their diets (85%) according to Morisita index. However the diversity of food items and the trophic niche breadth of P. australis (1D=8.86; B=4.76) were higher than C. rachovii (1D=3.37; B=2.25). Significant differences were observed in the diet of three sizes of P. australis (χ2, p<0.01) and between the sizes I and III of C. rachovii (χ2, p=0.03). In both species the diversity of food items increased with increasing their size. Between seasons, the differences in diet were significant for both species (χ2, p <0.0001). The high feeding overlap indicates that both species mostly use the same resources. Notwithstanding this, both the number of food items as the diversity and breadth of the trophic niche, suggest that these species use different feeding strategies, C. rachovii showed a trend towards specialization in microcrustacean?s consumption; while P. australis exhibited a broader trophic spectrum, incorporating insects from littoral areas and from the terrestrial community. The loss of the trophic dominant resource by increases of urbanization on the margin of the studied shallow lakes could lead to increase competition due to the wide overlap in the diet of both species.
Fil: Ibarra Polesel, Mario Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura; Argentina
Fil: Poi, Alicia Susana G.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina - Materia
-
peces
dieta
nicho trófico
lagunas periurbanas
noreste argentino
fish
diet
trophic niche
peri-urban lakes
Argentine Northeast - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/101461
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CONICET Digital (CONICET) |
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Alimentación de Characidium rachovii (Characiformes: Crenuchidae) y Pyrrhulina australis (Characiformes: Lebiasinidae) en lagunas someras de la provincia de Corrientes, ArgentinaFeeding of Characidium rachovii (Characiformes: Crenuchidae) and Pyrrhulina australis (Characiformes: Lebiasinidae) in shallow lakes of Corrientes, ArgentinaIbarra Polesel, Mario GabrielPoi, Alicia Susana G.pecesdietanicho tróficolagunas periurbanasnoreste argentinofishdiettrophic nicheperi-urban lakesArgentine Northeasthttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Feeding of Characidium rachovii (Characiformes: Crenuchidae) and Pyrrhulina australis (Characiformes: Lebiasinidae) in shallow lakes of Corrientes, Argentina. Fishes display diverse feeding strategies that may undergo modifications through ontogeny or seasonally with ecological implications in the food webs. Even though the significance of fishes as top predators is recognized, the diet of many of them is still scarcely known; especially in fish that inhabit shallow lakes densely vegetated. The aim of this study was to investigate the diet of Characidium rachovii and Pyrrhulina australis of different sizes classes (I, II and III); during winter and summer and estimate their trophic niche breadth. The field work was carried out in two shallow lakes fed by rain (Soto and Pampin lake, Corrientes province), from July 2011 to August 2012. The stomach contents of 104 individuals of C. rachovii and 91 specimens of P. australis were examined. Accumulation curve showed that the number of analyzed stomachs was representative for both species. Twenty three food items for C. rachovii and twenty eight for P. australis were recognized in the gut contents. According to the index of relative importance (IRI), both species feed preferably on cladocerans and midges (Chironomidae), and both species showed a large overlap in their diets (85%) according to Morisita index. However the diversity of food items and the trophic niche breadth of P. australis (1D=8.86; B=4.76) were higher than C. rachovii (1D=3.37; B=2.25). Significant differences were observed in the diet of three sizes of P. australis (χ2, p<0.01) and between the sizes I and III of C. rachovii (χ2, p=0.03). In both species the diversity of food items increased with increasing their size. Between seasons, the differences in diet were significant for both species (χ2, p <0.0001). The high feeding overlap indicates that both species mostly use the same resources. Notwithstanding this, both the number of food items as the diversity and breadth of the trophic niche, suggest that these species use different feeding strategies, C. rachovii showed a trend towards specialization in microcrustacean?s consumption; while P. australis exhibited a broader trophic spectrum, incorporating insects from littoral areas and from the terrestrial community. The loss of the trophic dominant resource by increases of urbanization on the margin of the studied shallow lakes could lead to increase competition due to the wide overlap in the diet of both species.Fil: Ibarra Polesel, Mario Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura; ArgentinaFil: Poi, Alicia Susana G.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; ArgentinaUniversidad de Costa Rica2016-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/101461Ibarra Polesel, Mario Gabriel; Poi, Alicia Susana G.; Alimentación de Characidium rachovii (Characiformes: Crenuchidae) y Pyrrhulina australis (Characiformes: Lebiasinidae) en lagunas someras de la provincia de Corrientes, Argentina; Universidad de Costa Rica; Revista de Biología Tropical; 64; 2; 5-2016; 603-6150034-7744CONICET DigitalCONICETspainfo:eu-repo/semantics/altIdentifier/doi/10.15517/rbt.v64i2.19602info:eu-repo/semantics/altIdentifier/url/https://revistas.ucr.ac.cr/index.php/rbt/article/view/19602info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:41:07Zoai:ri.conicet.gov.ar:11336/101461instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:41:07.271CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Alimentación de Characidium rachovii (Characiformes: Crenuchidae) y Pyrrhulina australis (Characiformes: Lebiasinidae) en lagunas someras de la provincia de Corrientes, Argentina Feeding of Characidium rachovii (Characiformes: Crenuchidae) and Pyrrhulina australis (Characiformes: Lebiasinidae) in shallow lakes of Corrientes, Argentina |
title |
Alimentación de Characidium rachovii (Characiformes: Crenuchidae) y Pyrrhulina australis (Characiformes: Lebiasinidae) en lagunas someras de la provincia de Corrientes, Argentina |
spellingShingle |
Alimentación de Characidium rachovii (Characiformes: Crenuchidae) y Pyrrhulina australis (Characiformes: Lebiasinidae) en lagunas someras de la provincia de Corrientes, Argentina Ibarra Polesel, Mario Gabriel peces dieta nicho trófico lagunas periurbanas noreste argentino fish diet trophic niche peri-urban lakes Argentine Northeast |
title_short |
Alimentación de Characidium rachovii (Characiformes: Crenuchidae) y Pyrrhulina australis (Characiformes: Lebiasinidae) en lagunas someras de la provincia de Corrientes, Argentina |
title_full |
Alimentación de Characidium rachovii (Characiformes: Crenuchidae) y Pyrrhulina australis (Characiformes: Lebiasinidae) en lagunas someras de la provincia de Corrientes, Argentina |
title_fullStr |
Alimentación de Characidium rachovii (Characiformes: Crenuchidae) y Pyrrhulina australis (Characiformes: Lebiasinidae) en lagunas someras de la provincia de Corrientes, Argentina |
title_full_unstemmed |
Alimentación de Characidium rachovii (Characiformes: Crenuchidae) y Pyrrhulina australis (Characiformes: Lebiasinidae) en lagunas someras de la provincia de Corrientes, Argentina |
title_sort |
Alimentación de Characidium rachovii (Characiformes: Crenuchidae) y Pyrrhulina australis (Characiformes: Lebiasinidae) en lagunas someras de la provincia de Corrientes, Argentina |
dc.creator.none.fl_str_mv |
Ibarra Polesel, Mario Gabriel Poi, Alicia Susana G. |
author |
Ibarra Polesel, Mario Gabriel |
author_facet |
Ibarra Polesel, Mario Gabriel Poi, Alicia Susana G. |
author_role |
author |
author2 |
Poi, Alicia Susana G. |
author2_role |
author |
dc.subject.none.fl_str_mv |
peces dieta nicho trófico lagunas periurbanas noreste argentino fish diet trophic niche peri-urban lakes Argentine Northeast |
topic |
peces dieta nicho trófico lagunas periurbanas noreste argentino fish diet trophic niche peri-urban lakes Argentine Northeast |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.6 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Feeding of Characidium rachovii (Characiformes: Crenuchidae) and Pyrrhulina australis (Characiformes: Lebiasinidae) in shallow lakes of Corrientes, Argentina. Fishes display diverse feeding strategies that may undergo modifications through ontogeny or seasonally with ecological implications in the food webs. Even though the significance of fishes as top predators is recognized, the diet of many of them is still scarcely known; especially in fish that inhabit shallow lakes densely vegetated. The aim of this study was to investigate the diet of Characidium rachovii and Pyrrhulina australis of different sizes classes (I, II and III); during winter and summer and estimate their trophic niche breadth. The field work was carried out in two shallow lakes fed by rain (Soto and Pampin lake, Corrientes province), from July 2011 to August 2012. The stomach contents of 104 individuals of C. rachovii and 91 specimens of P. australis were examined. Accumulation curve showed that the number of analyzed stomachs was representative for both species. Twenty three food items for C. rachovii and twenty eight for P. australis were recognized in the gut contents. According to the index of relative importance (IRI), both species feed preferably on cladocerans and midges (Chironomidae), and both species showed a large overlap in their diets (85%) according to Morisita index. However the diversity of food items and the trophic niche breadth of P. australis (1D=8.86; B=4.76) were higher than C. rachovii (1D=3.37; B=2.25). Significant differences were observed in the diet of three sizes of P. australis (χ2, p<0.01) and between the sizes I and III of C. rachovii (χ2, p=0.03). In both species the diversity of food items increased with increasing their size. Between seasons, the differences in diet were significant for both species (χ2, p <0.0001). The high feeding overlap indicates that both species mostly use the same resources. Notwithstanding this, both the number of food items as the diversity and breadth of the trophic niche, suggest that these species use different feeding strategies, C. rachovii showed a trend towards specialization in microcrustacean?s consumption; while P. australis exhibited a broader trophic spectrum, incorporating insects from littoral areas and from the terrestrial community. The loss of the trophic dominant resource by increases of urbanization on the margin of the studied shallow lakes could lead to increase competition due to the wide overlap in the diet of both species. Fil: Ibarra Polesel, Mario Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura; Argentina Fil: Poi, Alicia Susana G.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Centro de Ecología Aplicada del Litoral. Universidad Nacional del Nordeste. Centro de Ecología Aplicada del Litoral; Argentina |
description |
Feeding of Characidium rachovii (Characiformes: Crenuchidae) and Pyrrhulina australis (Characiformes: Lebiasinidae) in shallow lakes of Corrientes, Argentina. Fishes display diverse feeding strategies that may undergo modifications through ontogeny or seasonally with ecological implications in the food webs. Even though the significance of fishes as top predators is recognized, the diet of many of them is still scarcely known; especially in fish that inhabit shallow lakes densely vegetated. The aim of this study was to investigate the diet of Characidium rachovii and Pyrrhulina australis of different sizes classes (I, II and III); during winter and summer and estimate their trophic niche breadth. The field work was carried out in two shallow lakes fed by rain (Soto and Pampin lake, Corrientes province), from July 2011 to August 2012. The stomach contents of 104 individuals of C. rachovii and 91 specimens of P. australis were examined. Accumulation curve showed that the number of analyzed stomachs was representative for both species. Twenty three food items for C. rachovii and twenty eight for P. australis were recognized in the gut contents. According to the index of relative importance (IRI), both species feed preferably on cladocerans and midges (Chironomidae), and both species showed a large overlap in their diets (85%) according to Morisita index. However the diversity of food items and the trophic niche breadth of P. australis (1D=8.86; B=4.76) were higher than C. rachovii (1D=3.37; B=2.25). Significant differences were observed in the diet of three sizes of P. australis (χ2, p<0.01) and between the sizes I and III of C. rachovii (χ2, p=0.03). In both species the diversity of food items increased with increasing their size. Between seasons, the differences in diet were significant for both species (χ2, p <0.0001). The high feeding overlap indicates that both species mostly use the same resources. Notwithstanding this, both the number of food items as the diversity and breadth of the trophic niche, suggest that these species use different feeding strategies, C. rachovii showed a trend towards specialization in microcrustacean?s consumption; while P. australis exhibited a broader trophic spectrum, incorporating insects from littoral areas and from the terrestrial community. The loss of the trophic dominant resource by increases of urbanization on the margin of the studied shallow lakes could lead to increase competition due to the wide overlap in the diet of both species. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-05 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/101461 Ibarra Polesel, Mario Gabriel; Poi, Alicia Susana G.; Alimentación de Characidium rachovii (Characiformes: Crenuchidae) y Pyrrhulina australis (Characiformes: Lebiasinidae) en lagunas someras de la provincia de Corrientes, Argentina; Universidad de Costa Rica; Revista de Biología Tropical; 64; 2; 5-2016; 603-615 0034-7744 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/101461 |
identifier_str_mv |
Ibarra Polesel, Mario Gabriel; Poi, Alicia Susana G.; Alimentación de Characidium rachovii (Characiformes: Crenuchidae) y Pyrrhulina australis (Characiformes: Lebiasinidae) en lagunas someras de la provincia de Corrientes, Argentina; Universidad de Costa Rica; Revista de Biología Tropical; 64; 2; 5-2016; 603-615 0034-7744 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
spa |
language |
spa |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.15517/rbt.v64i2.19602 info:eu-repo/semantics/altIdentifier/url/https://revistas.ucr.ac.cr/index.php/rbt/article/view/19602 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Universidad de Costa Rica |
publisher.none.fl_str_mv |
Universidad de Costa Rica |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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1844614441031696384 |
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13.070432 |