Size- and Sex-Dependent Variation in Diet of Rhinella arenarum (Anura: Bufonidae) in a Wetland of San Juan, Argentina

Quiroga, Lorena B.; Sanabria, Eduardo Alfredo; Acosta, Juan Carlos

doi:10.1670/07-117r2.1

Cited by 26 publications

(24 citation statements)

References 11 publications

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“…This relationship is generally reflected in many Rhinella species by a positive relationship between mouth size and prey dimensions (e.g. Duré et al 2009, Quiroga et al 2009, Batista et al 2011, Maragno & Souza 2011, which was not observed for R. icterica in our study. The absence of a significant relationship between the prey size ingested and R. icterica size at Itatiaia National Park may be the result from the high consumption of ants, which are preys of small size and little size variation (which reduces the total prey volume in the toads' diets).…”

Section: Methodssupporting

confidence: 61%

“…These results suggested that toads of the genus Rhinella tend to feed predominantly on these arthropods, even living in different ecosystems along the distribution of the species and of the genus. Formicidae usually constitute dominant arthropod organisms among those living in the leaf-litter of the forest floor of the Atlantic forest biome (Lacerda et al 1998, Santos et al 1998 and is the most representative item in the diet of other Rhinella species (Toft 1980, Evans & Lampo 1996, Teixeira et al 1999, Isacch & Barg 2002, Sabagh & Carvalho-e-Silva 2008, Duré et al 2009, Ferreira & Teixeira 2009, Quiroga et al 2009, Maragno & Souza 2011. However, some species of Rhinella have beetles as the most important item in the diet (Lajmanovich 1994, Grant 1996, Duré et al 2009, Isaacas & Hoyos 2010, Batista et al 2011.…”

Section: Methodsmentioning

confidence: 99%

“…Some studies have investigated the relationship and influence of the size of the frog and the size of prey ingested (e.g. Sabagh & Carvalho-e-Silva 2008, Duré et al 2009, Quiroga et al 2009, Batista et al 2011, Maragno & Souza 2011 as an ontogenetic diet shift.…”

Section: Introductionmentioning

confidence: 99%

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Diet of the toad Rhinella icterica (Anura: Bufonidae) from Atlantic Forest Highlands of southeastern Brazil

2012

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Abstract:In this study, we present some information of the regarding throphic niche from the anuran toad Rhinella icterica living in high altitudes above 2000 m a.s.l. from a habitat of the Atlantic Forest Biome -the Altitude Fields in the Itatiaia National Park. We found 150 prey items in toad stomachs, belonging to five prey types, as well as skin remains and some remains of plant material. The index of relative importance indicated that most important prey types were beetles and ants, these last composing 70% of the diet numerically and the trophic niche breadth (B) was 1.81. The relatively low diversity of prey types we recorded in the diet of R. icterica of Itatiaia and numerically dominated by ants suggests some preference for this item. We do not found significant relationship between the toad measurements with the preys' measurements. We concluded that R. icterica toads at the highlands of Itatiaia feeds on arthropods, mainly ants and coleopterans and that the high consumption of preys with relatively small and similar size as ants in the diet prevents an expected relationship among frog body or mouth size and prey volume and size. Resumo: No presente estudo apresentamos informações sobre o nicho trófico de uma espécie de anuro que reside em altitudes elevadas da Mata Atlântica. Descrevemos a dieta do sapo Rhinella icterica em altitudes acima de 2000 m em áreas de Campos de Altitude no Parque Nacional do Itatiaia. Encontramos 150 itens nos estômagos analisados de R. icterica, divididos em apenas cinco categorias de presa, além de vestígios da própria pele do anuro e restos vegetais. O índice de importância relativa indicou que besouros e formigas foram os itens mais importantes sendo que formigas representam 70% dos itens ingeridos. A amplitude de nicho trófico (B) foi de 1,81. O reduzido número de categorias alimentares, bem como o elevado número de formigas na dieta sugere que R. icterica apresente uma preferência por este item. Não encontramos nenhuma relação significativa entre as dimensões do anuro com as dimensões das presas. Concluímos que a população de R. icterica que habita os campos de altitude de Itatiaia alimentam-se de artrópodes, principalmente formigas e besouros. O alto consumo de presas com tamanho relativamente semelhante e pequeno como, por exemplo, formigas, impede uma relação esperada entre o tamanho do corpo do anuro ou o tamanho de sua mandíbula e tamanho e volume de presas. Palavras-chave: Amphibia, hábitos alimentares, campos de altitude, nicho trófico, sapo Cururu. 259Toad's diet of brazilian highlands

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Section: Methodssupporting

confidence: 61%

Section: Methodsmentioning

confidence: 99%

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Diet of the toad Rhinella icterica (Anura: Bufonidae) from Atlantic Forest Highlands of southeastern Brazil

2012

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“…Despite the large number of studies describing dietary habits of anurans (e.g. Hirai andMatsui, 1999, 2002;Santos et al, 2004;Sabagh and Carvalho-e-Silva, 2008;Quiroga et al, 2009;Piatti and Souza, 2011), there is a paucity of studies about frog diets in rice fields (Hirai and Matsui, 2002;Piatti and Souza, 2011;Yousaf et al, 2010) and virtually no information is available from Nepal (but see Khatiwada et al in review). Some of the most important anuran dietary groups include coleoptera, lepidoptera, orthoptera, homoptera, hemiptera (Hirai and Matsui, 1999;Mahan and Johnson, 2007).…”

Section: Introductionmentioning

confidence: 99%

Frogs as potential biological control agents in the rice fields of Chitwan, Nepal

Khatiwada

Ghimire

Khatiwada

et al. 2016

Agriculture, Ecosystems & Environment

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“…Previous studies have already reported possible negative effects about this species in areas of intensive agriculture (Bionda et al 2011b(Bionda et al , 2012b(Bionda et al , 2013aBabini et al 2015). In addition, feeding strategy and habitat preference (Sanabria et al 2007;Quiroga et al 2009) as well as the demographic life-history traits have been investigated (Echeverría and Filipello 1990;Bionda et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Common toad Rhinella arenarum (Hensel, 1867) and its importance in assessing environmental health: test of micronuclei and nuclear abnormalities in erythrocytes

Pollo

Bionda

Salinas

et al. 2015

Environ Monit Assess

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Anthropogenic activities may generate significant changes in the integrity of aquatic ecosystems, so long-term monitoring of populations that inhabit them is crucial. Counting micronucleated erythrocytes (MN) and erythrocytic nuclear abnormalities (ENA) in peripheral blood is a widely used method for detecting chromosomal damage due to chemical agents in the water. We analyzed MN and ENA frequency in blood obtained from the common toad Rhinella arenarum populations in sites with different degrees of environmental degradation. The results of this study indicate that there is an association between the frequency of micronuclei and nuclear abnormalities and the degree of environmental alteration recorded for the sites studied.

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Size- and Sex-Dependent Variation in Diet of Rhinella arenarum (Anura: Bufonidae) in a Wetland of San Juan, Argentina

Cited by 26 publications

References 11 publications

Diet of the toad Rhinella icterica (Anura: Bufonidae) from Atlantic Forest Highlands of southeastern Brazil

Diet of the toad Rhinella icterica (Anura: Bufonidae) from Atlantic Forest Highlands of southeastern Brazil

Frogs as potential biological control agents in the rice fields of Chitwan, Nepal

Common toad Rhinella arenarum (Hensel, 1867) and its importance in assessing environmental health: test of micronuclei and nuclear abnormalities in erythrocytes

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