Spatial and Trophic Structure of Anuran Assemblages in Environments with Different Seasonal Regimes in the Brazilian Northeast Region

Caldas, Francis Luiz Santos; Garda, Adrian Antonio; Cavalcanti, Lucas B. Q.; Leite-Filho, Edinaldo; Faria, Renato Gomes; Mesquita, Daniel Oliveira

doi:10.1643/ch-18-109

Cited by 13 publications

(14 citation statements)

References 108 publications

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“…forest in Bolivia (Heyer, 2005;Jansen and Schulze, 2012;de Sá et al, 2014). This species mainly feeds on arthropods and small vertebrates (e.g., frogs and bats; Santana et al, 2012;Leite Filho et al, 2014;Caldas et al, 2019). Herein we report for the first time a predation on the endemic leptodactylid Rupirana cardosoi Heyer, 1999 by a juvenile L. vastus in Bahia state, Brazil, and provide a prey items compilation for L. vastus.…”

Section: Accepted Manuscriptmentioning

confidence: 63%

“…In all available papers there are reports of vertebrates in the diet of L. vastus, mostly on anurans (seven Accepted Manuscript ACTA BIOLÓGICA COLOMBIANA species) followed by bats (six species) and one species of lizard (Table 1). Batrachophagy by L. vastus seems common (Table 1), being anurans the most important prey item of the species during the dry season in one locality (Caldas et al, 2019). Most anuran preys' reports are leptodactylids, followed by two species of hylids preyed around ponds (Table 1).…”

Section: Leptodactylus Vastusmentioning

confidence: 99%

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Leptodactylus vastus (LEPTODACTYLIDAE) predation on an endemic frog, and a compilation of its diet

et al. 2021

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Diet composition constitutes basic information on the natural history of the species. Despite the amount of data acquired in the last years, much remains to be known specially for geographically widespread species. Here we compiled the available dietary items of Leptodactylus vastus and report the first predation event upon Rupirana cardosoi by a juvenile L. vastus. The fact these species are syntopic in the region probably resulted in this novel predation event. Different from previous L. vastus predation observations, the specimens we observed do not present a striking difference in body size, but L. vastus was able to almost swallow L. cardosoi, coherent with findings that mouth size is related to prey selection in anurans. Also, our literature review showed that L. vastus is a generalist and opportunistic predator, that prey upon small vertebrates (Amphibia, Squamata, and Mammalia).

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Section: Accepted Manuscriptmentioning

confidence: 63%

Section: Leptodactylus Vastusmentioning

confidence: 99%

Leptodactylus vastus (LEPTODACTYLIDAE) predation on an endemic frog, and a compilation of its diet

et al. 2021

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“…A recent study that compared trophic niches of frogs from the Caatinga (dry region) with frogs from the Atlantic Forest (mesic region) of Brazil similarly found lower prey availability and lower niche overlap in the dry region (Caldas et al . 2019). In our study, trophic niche overlap was higher for frogs in the wetland where primary productivity and prey availability were greater, which implies a lack of competition for food resources in the coastal wetland (Oliveira et al .…”

Section: Discussionmentioning

confidence: 99%

Trophic structure of frog assemblages in coastal habitats in southern Brazil

et al. 2020

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We evaluated the hypothesis that contrasting environmental conditions in a coastal wetland and nearby sand dunes results in frog assemblages with divergent trophic structures. We predicted that the more productive habitat (wetland) would have higher diversity of primary producers and frogs with larger trophic niches and greater interspecific dietary overlap when compared to the less-productive dune habitat. Stomach content analysis (SCA) and stable isotope analysis (SIA) were used to compare frog trophic ecology in the two habitats. We compared trophic niche size (Shannon's index) and overlap (Pianka's index; isotopic ellipse area, SEA c). Bayesian isotope mixing models were used to estimate relative contributions of basal production sources to frog biomass in each habitat. Estimates indicated that wetland frogs assimilated material from diverse basal sources (suspended particulate organic matter (POM), C 3 plants, periphyton), whereas frogs inhabiting dunes assimilated material mostly originating from C 3 plants. Both SCA and SIA revealed less trophic overlap among frogs from the sand dunes compared with those from the wetland. Dietary overlap was greater than expected at random for frogs in both the wetland and dunes. Mean overlap among isotopic ellipses (SEAc) of all frogs at each habitat was higher in the wetland (0.14&) than in the dunes (0.04&). These findings corroborate our prediction that trophic structure in the wetland is more complex than in the sand dunes. Also, as expected, we observed greater isotopic niche segregation among frogs in the sand dunes, a potential mechanism that reduces competition for limited food resources.

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“…Previous research on Dermatonotus muelleri diet indicates a specialization in ants and termites (Vaz-Silva et al, 2003;Leite-Filho et al, 2015;Menin et al, 2015;Caldas et al, 2019). Considering that Dermatonotus muelleri presents explosive reproductive behavior (Nomura, 2003), and once the termites are also most abundant in the wet season (Pinheiro et al, 2002), the great number of Isoptera in its stomach content may be attributed to the high abundance of this prey in the environment during this season.…”

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confidence: 95%

“…Among the Microhylidae species, Dermatonotus muelleri (Boettger, 1885) is a widely distributed semi fossorial frog considered a forelimbs-head-first burrower (Nomura et al, 2009). In Brazil, this species' feeding habits were recorded for the Central-Western (Vaz-Silva et al, 2003), Southeastern (Menin et al, 2015), and Northeastern Regions (Leite-Filho et al, 2015;Caldas et al, 2019), but data from the semi-arid was still missing. Here, we present the feeding habits of D. muelleri from a semiarid region in Pernambuco state, Northeastern Brazil and discussed the classification of a "specialized diet" for this species.…”

mentioning

confidence: 99%

Feeding habits of Dermatonotus muelleri (Anura, Microhylidae) from a semiarid region in Pernambuco state, Northeastern Brazil

et al. 2021

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Spatial and Trophic Structure of Anuran Assemblages in Environments with Different Seasonal Regimes in the Brazilian Northeast Region

Cited by 13 publications

References 108 publications

Leptodactylus vastus (LEPTODACTYLIDAE) predation on an endemic frog, and a compilation of its diet

Leptodactylus vastus (LEPTODACTYLIDAE) predation on an endemic frog, and a compilation of its diet

Trophic structure of frog assemblages in coastal habitats in southern Brazil

Feeding habits of Dermatonotus muelleri (Anura, Microhylidae) from a semiarid region in Pernambuco state, Northeastern Brazil

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