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 Guadalupe
Año de publicación
2016
Idioma
español castellano
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Fil: Ibarra Polesel, Mario Gabriel. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura; Argentina.
Fil: Ibarra Polesel, Mario Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Ecología Aplicada del Litoral; Argentina.
Fil: Poi, Alicia Susana Guadalupe. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura; Argentina
Fil: Poi, Alicia Susana Guadalupe. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Ecología Aplicada del Litoral; Argentina.
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 size 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 diet differences 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 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 increasing urbanization on the margin of the studied shallow lakes, could lead to increased competition, due to the wide diet overlap in both species. Rev. Biol. Trop. 64 (2): 603-615. Epub 2016 June 01.
Fuente
Revista de Biología Tropical, 2016, vol. 64, no. 2, p. 603-615.
Materia
Fish
Diet
Trophic niche
Peri-urban lakes
Argentine northeast
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
Institución
Universidad Nacional del Nordeste
OAI Identificador
oai:repositorio.unne.edu.ar:123456789/30703

id RIUNNE_beb25f124c709c45af4891c885634cd2
oai_identifier_str oai:repositorio.unne.edu.ar:123456789/30703
network_acronym_str RIUNNE
repository_id_str 4871
network_name_str Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
spelling Alimentación de characidium rachovii (characiformes: crenuchidae) y pyrrhulina australis (characiformes: lebiasinidae) en lagunas someras de la provincia de Corrientes, ArgentinaIbarra Polesel, Mario GabrielPoi, Alicia Susana GuadalupeFishDietTrophic nichePeri-urban lakesArgentine northeastFil: Ibarra Polesel, Mario Gabriel. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura; Argentina.Fil: Ibarra Polesel, Mario Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Ecología Aplicada del Litoral; Argentina.Fil: Poi, Alicia Susana Guadalupe. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura; ArgentinaFil: Poi, Alicia Susana Guadalupe. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Ecología Aplicada del Litoral; Argentina.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 size 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 diet differences 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 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 increasing urbanization on the margin of the studied shallow lakes, could lead to increased competition, due to the wide diet overlap in both species. Rev. Biol. Trop. 64 (2): 603-615. Epub 2016 June 01.Universidad de Costa Rica2016info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfIbarra Polesel, Mario Gabriel y Poi, Alicia Susana Guadalupe, 2016. Alimentación de characidium rachovii (characiformes: crenuchidae) y pyrrhulina australis (characiformes: lebiasinidae) en lagunas someras de la provincia de Corrientes, Argentina. Revista de Biología Tropical. San José: Universidad de Costa Rica, vol. 64, no. 2, p. 603-615. ISSN 0034-7744.2215-2075http://repositorio.unne.edu.ar/handle/123456789/30703Revista de Biología Tropical, 2016, vol. 64, no. 2, p. 603-615.reponame:Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)instname:Universidad Nacional del Nordestespainfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/2.5/ar/Atribución-NoComercial-SinDerivadas 2.5 Argentina2025-09-29T14:30:52Zoai:repositorio.unne.edu.ar:123456789/30703instacron:UNNEInstitucionalhttp://repositorio.unne.edu.ar/Universidad públicaNo correspondehttp://repositorio.unne.edu.ar/oaiososa@bib.unne.edu.ar;sergio.alegria@unne.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:48712025-09-29 14:30:52.648Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) - Universidad Nacional del Nordestefalse
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
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
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 Guadalupe
author Ibarra Polesel, Mario Gabriel
author_facet Ibarra Polesel, Mario Gabriel
Poi, Alicia Susana Guadalupe
author_role author
author2 Poi, Alicia Susana Guadalupe
author2_role author
dc.subject.none.fl_str_mv Fish
Diet
Trophic niche
Peri-urban lakes
Argentine northeast
topic Fish
Diet
Trophic niche
Peri-urban lakes
Argentine northeast
dc.description.none.fl_txt_mv Fil: Ibarra Polesel, Mario Gabriel. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura; Argentina.
Fil: Ibarra Polesel, Mario Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Ecología Aplicada del Litoral; Argentina.
Fil: Poi, Alicia Susana Guadalupe. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura; Argentina
Fil: Poi, Alicia Susana Guadalupe. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro de Ecología Aplicada del Litoral; Argentina.
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 size 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 diet differences 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 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 increasing urbanization on the margin of the studied shallow lakes, could lead to increased competition, due to the wide diet overlap in both species. Rev. Biol. Trop. 64 (2): 603-615. Epub 2016 June 01.
description Fil: Ibarra Polesel, Mario Gabriel. Universidad Nacional del Nordeste. Facultad de Ciencias Exactas y Naturales y Agrimensura; Argentina.
publishDate 2016
dc.date.none.fl_str_mv 2016
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 Ibarra Polesel, Mario Gabriel y Poi, Alicia Susana Guadalupe, 2016. Alimentación de characidium rachovii (characiformes: crenuchidae) y pyrrhulina australis (characiformes: lebiasinidae) en lagunas someras de la provincia de Corrientes, Argentina. Revista de Biología Tropical. San José: Universidad de Costa Rica, vol. 64, no. 2, p. 603-615. ISSN 0034-7744.
2215-2075
http://repositorio.unne.edu.ar/handle/123456789/30703
identifier_str_mv Ibarra Polesel, Mario Gabriel y Poi, Alicia Susana Guadalupe, 2016. Alimentación de characidium rachovii (characiformes: crenuchidae) y pyrrhulina australis (characiformes: lebiasinidae) en lagunas someras de la provincia de Corrientes, Argentina. Revista de Biología Tropical. San José: Universidad de Costa Rica, vol. 64, no. 2, p. 603-615. ISSN 0034-7744.
2215-2075
url http://repositorio.unne.edu.ar/handle/123456789/30703
dc.language.none.fl_str_mv spa
language spa
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Atribución-NoComercial-SinDerivadas 2.5 Argentina
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Atribución-NoComercial-SinDerivadas 2.5 Argentina
dc.format.none.fl_str_mv 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 Revista de Biología Tropical, 2016, vol. 64, no. 2, p. 603-615.
reponame:Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
instname:Universidad Nacional del Nordeste
reponame_str Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
collection Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE)
instname_str Universidad Nacional del Nordeste
repository.name.fl_str_mv Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) - Universidad Nacional del Nordeste
repository.mail.fl_str_mv ososa@bib.unne.edu.ar;sergio.alegria@unne.edu.ar
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