Diet of Dendropsophus microcephalus and Scarthyla vigilans (Anura: Hylidae) at a locality in north-western Venezuela with notes on microhabitat occupation

Fonseca-Pérez, Kimberlyn Andreina; Molina, César; Tárano, Zaida

doi:10.11606/0031-1049.2017.57.07

Cited by 8 publications

(5 citation statements)

References 46 publications

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“…Granted, other factors may have contributed to the difference between these studies, but it has been demonstrated that the level of taxonomic resolution can influence assumptions of prey utilization [ 34 ]. Dietary overlap appears substantially higher when the taxonomic resolution of prey is low and a decrease in overlap can be revealed with higher prey resolution [ 34 , 78 , 79 , 80 ].…”

Section: Discussionmentioning

confidence: 99%

Faunal Diet of Adult Cane Toads, Rhinella marina, in the Urban Landscape of Southwest Florida

Schuman,

Snyder,

Smoak

et al. 2023

Animals

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We investigated the diet of cane toads (Rhinella marina) inhabiting urbanized areas in southwest Florida to provide high taxonomic resolution of prey items, contrast toad diets between sampling seasons and sexes, and assess this invasive species’ ecological role in the urban landscape. A pest control agency collected cane toads from two golf course communities in Naples, Florida, USA during November–December 2018 (early dry season) and June–July 2019 (early wet season), and faunal stomach contents were quantified from a random subsample of 240 adult toads (30 males and 30 females from each community and season). Yellow-banded millipedes (Anadenobolus monilicornis), big-headed ants (Pheidole spp.), and hunting billbugs (Sphenophorus venatus vestitus) were the most frequently consumed prey items and had the highest total numbers and/or volume with corresponding highest indices of relative importance. There was considerable overlap in the seasonal prey importance values for each golf course community and little if any difference in the importance values between toad sexes in each community. Nonetheless, big-headed ants were the most important prey in both communities during the wet season, while yellow-banded millipedes were the most important dry season prey in one community and hunting billbugs the most important in the other. Despite limited spatiotemporal sampling effort, our results indicated that cane toad was consuming arthropod taxa considered pests in the urban ecosystem. Further studies are needed to investigate the potential effects of human activities and environmental variability on the cane toad diet and to determine whether cane toads act as a biological control for pest populations.

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Section: Discussionmentioning

confidence: 99%

Faunal Diet of Adult Cane Toads, Rhinella marina, in the Urban Landscape of Southwest Florida

Schuman,

Snyder,

Smoak

et al. 2023

Animals

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“…Our results show that at the Order level, the overlapping is evident but not at higher levels of taxonomic resolution such as families or morphospecie. This classification reveals broadscale trophic patterns not detectable when working at a more detailed prey level, such as species or morphospecies (Piatti & Souza 2011, Fonseca-Pérez et al 2017. At a spatial scale, the sites were dissimilar in composition and abundance of species and morphospecies of prey.…”

Section: Spatial-seasonal Diets Dynamicsmentioning

confidence: 96%

“…Taking into account the high diversity of insects in tropical forests, no overlap is observed at higher taxonomic resolution levels such as family or morphospecies (García-Robledo et al 2020). These levels can be used to analyze diet variability locally and correctly identify the segregation of trophic niche, especially when the general pattern indicates overlap (Piatti & Souza 2011, Fonseca-Pérez et al 2017. The coexistence of species that have overlapping diets may be explained in part by the high abundance of the resource and by the segregation of prey at higher taxonomic resolution levels.…”

Section: Introductionmentioning

confidence: 99%

Anurans trophic dynamic and guild structure in tropical dry forests of the Caribbean region of Colombia

Blanco‐Torres

Duré

Bonilla

2021

An. Acad. Bras. Ciênc.

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Studies on the exploitation of trophic resources allow to establish interactions between predators and predator-prey, and this dynamic can present fl uctuations over time and space. We analysed stomach contents of 19 anuran species from tropical dry forests of Colombia, quantifi ed the overlap between species and identifi ed anuran trophic guilds. Most of the species were generalists in diet (89.5%), some with strong prey dominance and only two species were classifi ed as specialists. Two anurans guilds were identifi ed according to diet structure and habitat use: "ground foraging anurans, consuming Formicidae and Isoptera" and "arboreal 'sit-and-wait' predators, primarily consuming arachnids". A considerable number of species did not clearly group in community trophic structure analysis. The level of taxonomic resolution with that preys are worked affects analysis of trophic niches segregation when analyzing regional and local patterns. Anuran species of tropical dry forest in the Colombian Caribbean display trophic resources partitioning at the level of species and/or morphospecies, as a mechanism of coexistence.

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“…Los estudios del uso de microhábitats en anfibios brindan información importante acerca de los patrones de forrajeo y tipos de presas consumidas (Duré y Kehr, 2004;Cajade et al 2010;Posso-Peláez et al 2017). Se ha documentado que los anfibios adultos generalmente consumen invertebrados y en algunos casos pueden alimentarse de pequeños vertebrados, sin embargo, la composición taxonómica de las presas depende principalmente del patrón de uso de los microhábitats, dicha composición de las presas ha sido relacionada con el tamaño y sexo de los individuos (Fonseca-Pérez et al 2017). De acuerdo con Luría-Manzano et al (2018), la talla de las ranas es importante al momento de la captura de las presas, debido a que individuos de mayor tamaño consumen presas más grandes, en comparación con los más pequeños.…”

Section: Introductionunclassified

USO DE MICROHÁBITATS Y DIVERSIDAD DE PRESAS CONSUMIDAS POR <i>Craugastor berkenbuschii</i> (Anura: Craugastoridae) EN MÉXICO

Ríos-Rodas,

Zenteno-Ruiz,

Gerónimo-Torres

et al. 2023

Acta biol. Colomb.

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Analizamos el uso de microhábitat para las diferentes clases etarias entre épocas climáticas y comparamos la diversidad de presas consumidas por los machos y hembras adultas de Craugastor berkenbuschii en un arroyo tropical del sureste de México. Los datos fueron colectados en diez transectos de 100 x 15 m, separados entre sí por 25 m de distancia entre ellos. Los muestreos diurnos y nocturnos se realizaron mensualmente entre septiembre 2017 y agosto 2018. A cada individuo observado le registramos el sexo, la clase etaria y el microhábitat utilizado al momento del avistamiento. Las presas consumidas fueron extraídas mediante lavados estomacales in situ. Registramos un total de 437 individuos; 165 fueron adultos, 162 juveniles y 110 crías. Los microhábitats utilizados fueron roca, hojarasca, suelo, tronco, rama, hojas y raíz, de los cuales roca fue el más utilizado independientemente de la época del año y clases etarias. Se identificaron 21 órdenes de presas, 19 órdenes en hembras y 11 en machos. El índice de diversidad verdadera (1D), mostró valores similares para machos y hembras, con 9,67 y 9,08 respectivamente. El índice de distintividad taxonómica promedio (Δ+) determinó que las hembras consumen una mayor diversidad de presas que los machos, con 5,12 y 4,25, respectivamente. Los resultados muestran que las diferentes clases etarias de C. berkenbuschii aprovechan una gran variedad de microhábitats entre épocas climáticas y que existen diferencias entre las presas consumidas entre machos y hembras adultas.

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Diet of Dendropsophus microcephalus and Scarthyla vigilans (Anura: Hylidae) at a locality in north-western Venezuela with notes on microhabitat occupation

Abstract: The coexistence of species with similar ecological requirements (food, space, time) Agelenidae (11.1%), Tachinidae (9.32%) and . Gryllidae (14.13%), Cicadidae (9.1%), Cicadellidae (8.3%) and Delphacidae (8.02%)

Cited by 8 publications

References 46 publications

Faunal Diet of Adult Cane Toads, Rhinella marina, in the Urban Landscape of Southwest Florida

Faunal Diet of Adult Cane Toads, Rhinella marina, in the Urban Landscape of Southwest Florida

Anurans trophic dynamic and guild structure in tropical dry forests of the Caribbean region of Colombia

USO DE MICROHÁBITATS Y DIVERSIDAD DE PRESAS CONSUMIDAS POR <i>Craugastor berkenbuschii</i> (Anura: Craugastoridae) EN MÉXICO

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