Diet of Melanophryniscus paraguayensis (Anura: Bufonidae): An Endemic Species to Paraguay

Autores
Núñez, Karina; Duré Pitteri, Marta Inés; Zárate, Griselda; Ortiz, Fátima; Mendoza, Medes
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Melanophryniscus paraguayensis (no common name) is an endemic toad of the central grasslands in the eastern region of Paraguay. Details about its natural history are poorly understood and it is categorized nationally as Vulnerable. This work describes the diet composition of this species and the relationship between toad body size and the number and volume of prey consumed. We analyzed the stomach content of 162 individuals, using the stomach flushing technique, after measuring and weighing them. For each prey category, we calculated the volume, number, and frequency of occurrence, and we estimated the relative importance index (IRI) with these data. We also estimated the standardized Shannon Diversity Index and Levins Niche Breadth Index for prey categories, and we analyzed the correlation between size of the anurans and prey size. Seventy-six individuals had identifiable content, which consisted of 1,357 prey classified into 16 categories, mostly at the order level. Ants and mites were the prey taxa with the greatest contribution in number and frequency and represent the most important prey based on IRI. Volumetrically, ants and beetles predominated. Ticks, spiders, springtails, flies, true bugs, wasps, termites, thrips, larvae and nymphs of insects, centipedes, crabs, and snails were occasional prey. The mean prey volume consumed by toads was positively correlated with toad snout-vent length. The Shannon and Levins indices showed that the composition of the diet was dominated by a few groups of arthropods. This work demonstrates the importance of ants, mites, and beetles as food for M. paraguayensis, which is consistent with findings for other species of the genus Melanophryniscus and of many species of the Bufonidae family.
Fil: Núñez, Karina. Universidad Nacional de Asunción; Paraguay
Fil: Duré Pitteri, Marta Inés. 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
Fil: Zárate, Griselda. Universidad Nacional de Asunción; Paraguay
Fil: Ortiz, Fátima. Universidad Nacional de Asunción; Paraguay
Fil: Mendoza, Medes. Universidad Nacional de Asunción; Paraguay
Materia
FORMICIDAE
PREDATOR-PREY
TROPHIC ECOLOGY
ANURA
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/183394
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Diet of Melanophryniscus paraguayensis (Anura: Bufonidae): An Endemic Species to ParaguayNúñez, KarinaDuré Pitteri, Marta InésZárate, GriseldaOrtiz, FátimaMendoza, MedesFORMICIDAEPREDATOR-PREYTROPHIC ECOLOGYANURAhttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Melanophryniscus paraguayensis (no common name) is an endemic toad of the central grasslands in the eastern region of Paraguay. Details about its natural history are poorly understood and it is categorized nationally as Vulnerable. This work describes the diet composition of this species and the relationship between toad body size and the number and volume of prey consumed. We analyzed the stomach content of 162 individuals, using the stomach flushing technique, after measuring and weighing them. For each prey category, we calculated the volume, number, and frequency of occurrence, and we estimated the relative importance index (IRI) with these data. We also estimated the standardized Shannon Diversity Index and Levins Niche Breadth Index for prey categories, and we analyzed the correlation between size of the anurans and prey size. Seventy-six individuals had identifiable content, which consisted of 1,357 prey classified into 16 categories, mostly at the order level. Ants and mites were the prey taxa with the greatest contribution in number and frequency and represent the most important prey based on IRI. Volumetrically, ants and beetles predominated. Ticks, spiders, springtails, flies, true bugs, wasps, termites, thrips, larvae and nymphs of insects, centipedes, crabs, and snails were occasional prey. The mean prey volume consumed by toads was positively correlated with toad snout-vent length. The Shannon and Levins indices showed that the composition of the diet was dominated by a few groups of arthropods. This work demonstrates the importance of ants, mites, and beetles as food for M. paraguayensis, which is consistent with findings for other species of the genus Melanophryniscus and of many species of the Bufonidae family.Fil: Núñez, Karina. Universidad Nacional de Asunción; ParaguayFil: Duré Pitteri, Marta Inés. 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; ArgentinaFil: Zárate, Griselda. Universidad Nacional de Asunción; ParaguayFil: Ortiz, Fátima. Universidad Nacional de Asunción; ParaguayFil: Mendoza, Medes. Universidad Nacional de Asunción; ParaguayHerpetological Conservation and Biology2021-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/183394Núñez, Karina; Duré Pitteri, Marta Inés; Zárate, Griselda; Ortiz, Fátima; Mendoza, Medes; Diet of Melanophryniscus paraguayensis (Anura: Bufonidae): An Endemic Species to Paraguay; Herpetological Conservation and Biology; Herpetological Conservation and Biology; 16; 2; 8-2021; 251-2581931-76032151-0733CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.herpconbio.org/contents_vol16_issue2.htmlinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:55:53Zoai:ri.conicet.gov.ar:11336/183394instacron: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 09:55:54.067CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Diet of Melanophryniscus paraguayensis (Anura: Bufonidae): An Endemic Species to Paraguay
title Diet of Melanophryniscus paraguayensis (Anura: Bufonidae): An Endemic Species to Paraguay
spellingShingle Diet of Melanophryniscus paraguayensis (Anura: Bufonidae): An Endemic Species to Paraguay
Núñez, Karina
FORMICIDAE
PREDATOR-PREY
TROPHIC ECOLOGY
ANURA
title_short Diet of Melanophryniscus paraguayensis (Anura: Bufonidae): An Endemic Species to Paraguay
title_full Diet of Melanophryniscus paraguayensis (Anura: Bufonidae): An Endemic Species to Paraguay
title_fullStr Diet of Melanophryniscus paraguayensis (Anura: Bufonidae): An Endemic Species to Paraguay
title_full_unstemmed Diet of Melanophryniscus paraguayensis (Anura: Bufonidae): An Endemic Species to Paraguay
title_sort Diet of Melanophryniscus paraguayensis (Anura: Bufonidae): An Endemic Species to Paraguay
dc.creator.none.fl_str_mv Núñez, Karina
Duré Pitteri, Marta Inés
Zárate, Griselda
Ortiz, Fátima
Mendoza, Medes
author Núñez, Karina
author_facet Núñez, Karina
Duré Pitteri, Marta Inés
Zárate, Griselda
Ortiz, Fátima
Mendoza, Medes
author_role author
author2 Duré Pitteri, Marta Inés
Zárate, Griselda
Ortiz, Fátima
Mendoza, Medes
author2_role author
author
author
author
dc.subject.none.fl_str_mv FORMICIDAE
PREDATOR-PREY
TROPHIC ECOLOGY
ANURA
topic FORMICIDAE
PREDATOR-PREY
TROPHIC ECOLOGY
ANURA
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Melanophryniscus paraguayensis (no common name) is an endemic toad of the central grasslands in the eastern region of Paraguay. Details about its natural history are poorly understood and it is categorized nationally as Vulnerable. This work describes the diet composition of this species and the relationship between toad body size and the number and volume of prey consumed. We analyzed the stomach content of 162 individuals, using the stomach flushing technique, after measuring and weighing them. For each prey category, we calculated the volume, number, and frequency of occurrence, and we estimated the relative importance index (IRI) with these data. We also estimated the standardized Shannon Diversity Index and Levins Niche Breadth Index for prey categories, and we analyzed the correlation between size of the anurans and prey size. Seventy-six individuals had identifiable content, which consisted of 1,357 prey classified into 16 categories, mostly at the order level. Ants and mites were the prey taxa with the greatest contribution in number and frequency and represent the most important prey based on IRI. Volumetrically, ants and beetles predominated. Ticks, spiders, springtails, flies, true bugs, wasps, termites, thrips, larvae and nymphs of insects, centipedes, crabs, and snails were occasional prey. The mean prey volume consumed by toads was positively correlated with toad snout-vent length. The Shannon and Levins indices showed that the composition of the diet was dominated by a few groups of arthropods. This work demonstrates the importance of ants, mites, and beetles as food for M. paraguayensis, which is consistent with findings for other species of the genus Melanophryniscus and of many species of the Bufonidae family.
Fil: Núñez, Karina. Universidad Nacional de Asunción; Paraguay
Fil: Duré Pitteri, Marta Inés. 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
Fil: Zárate, Griselda. Universidad Nacional de Asunción; Paraguay
Fil: Ortiz, Fátima. Universidad Nacional de Asunción; Paraguay
Fil: Mendoza, Medes. Universidad Nacional de Asunción; Paraguay
description Melanophryniscus paraguayensis (no common name) is an endemic toad of the central grasslands in the eastern region of Paraguay. Details about its natural history are poorly understood and it is categorized nationally as Vulnerable. This work describes the diet composition of this species and the relationship between toad body size and the number and volume of prey consumed. We analyzed the stomach content of 162 individuals, using the stomach flushing technique, after measuring and weighing them. For each prey category, we calculated the volume, number, and frequency of occurrence, and we estimated the relative importance index (IRI) with these data. We also estimated the standardized Shannon Diversity Index and Levins Niche Breadth Index for prey categories, and we analyzed the correlation between size of the anurans and prey size. Seventy-six individuals had identifiable content, which consisted of 1,357 prey classified into 16 categories, mostly at the order level. Ants and mites were the prey taxa with the greatest contribution in number and frequency and represent the most important prey based on IRI. Volumetrically, ants and beetles predominated. Ticks, spiders, springtails, flies, true bugs, wasps, termites, thrips, larvae and nymphs of insects, centipedes, crabs, and snails were occasional prey. The mean prey volume consumed by toads was positively correlated with toad snout-vent length. The Shannon and Levins indices showed that the composition of the diet was dominated by a few groups of arthropods. This work demonstrates the importance of ants, mites, and beetles as food for M. paraguayensis, which is consistent with findings for other species of the genus Melanophryniscus and of many species of the Bufonidae family.
publishDate 2021
dc.date.none.fl_str_mv 2021-08
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/11336/183394
Núñez, Karina; Duré Pitteri, Marta Inés; Zárate, Griselda; Ortiz, Fátima; Mendoza, Medes; Diet of Melanophryniscus paraguayensis (Anura: Bufonidae): An Endemic Species to Paraguay; Herpetological Conservation and Biology; Herpetological Conservation and Biology; 16; 2; 8-2021; 251-258
1931-7603
2151-0733
CONICET Digital
CONICET
url http://hdl.handle.net/11336/183394
identifier_str_mv Núñez, Karina; Duré Pitteri, Marta Inés; Zárate, Griselda; Ortiz, Fátima; Mendoza, Medes; Diet of Melanophryniscus paraguayensis (Anura: Bufonidae): An Endemic Species to Paraguay; Herpetological Conservation and Biology; Herpetological Conservation and Biology; 16; 2; 8-2021; 251-258
1931-7603
2151-0733
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.herpconbio.org/contents_vol16_issue2.html
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
dc.publisher.none.fl_str_mv Herpetological Conservation and Biology
publisher.none.fl_str_mv Herpetological Conservation and Biology
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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score 13.070432

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