Uso de microhábitats, actividad diaria y dieta de Dendrobates truncatus (cope, 1861) (Anura: Dendrobatidae) en bosque seco tropical del norte de Colombia

Posso-Peláez, Carolina; Blanco‐Torres, Argelina; Gutiérrez-Moreno, Luis C.

doi:10.21829/azm.2017.3331150

Cited by 4 publications

(3 citation statements)

References 22 publications

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“…Although our results support the idea that poison frogs rely on ants and mites for their defenses, it is still possible that they rely on other prey for defenses. For example, some Staphylinidae beetles, which were commonly found in the stomachs of O. sylvatica in this study, have evolved chemical mimicry to deter ants from attacking (41), and these beetles also made up over 25% of the stomach contents on a prior study of Dendrobates truncatus poison frogs (42). As alkaloid profiles of arthropods are understudied, we strongly encourage future studies to focus on extensive chemical quantification of these prey items in order to understand patterns of trophic interactions.…”

Section: Discussionmentioning

confidence: 87%

Poison frog diet and chemical defense are influenced by availability and selectivity for ants

Moskowitz

Alvarez-Buylla

Morrison

et al. 2022

Preprint

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The ability to use small molecule alkaloids as defensive chemicals has evolved in many organisms, often via trophic interactions due to dietary specialization. Animals with diet-derived defenses must balance food choices to maintain their defense reservoirs along with other physiological needs. However, environmental availability of prey and dietary preferences of vertebrate animals with acquired defenses remains largely unexplored. Here, we test the hypothesis that poison frogs that sequester alkaloids from their arthropod prey display prey preference. We collected alkaloid-defended dDiablito frogs (Oophaga sylvatica) and leaf litter samples in five localities in northwestern Ecuador. Additionally, we collected the undefended Chimbo rocket frogs (Hyloxalus infraguttatus) from one locality in which it is living in sympatry with O. sylvatica. We found that both diets and skin alkaloids of O. sylvatica frogs were distinct among localities, and that undefended and sympatric H. infraguttatus ate fewer ants and mites. Unexpectedly, across O. sylvatica populations, we found a negative correlation between their summed skin alkaloid content and number of ants and mites they consumed. Finally, we compared leaf litter ants to frog stomach contents, and found that frogs eat a small subset of the available ant genera found in surrounding leaf litter, as only 13% of all the ants recovered from leaf litter samples belong to the 16 ant genera consumed by the frogs. Our results suggest that the consumption of diet-acquired defenses depends on preference-informed food choices in addition to environmental availability. This impacts our understanding of chemical defenses as a whole, as behavioral reinforcement may be an understudied, yet important selection factor in the evolution of acquired defenses.

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Section: Discussionmentioning

confidence: 87%

Poison frog diet and chemical defense are influenced by availability and selectivity for ants

Moskowitz

Alvarez-Buylla

Morrison

et al. 2022

Preprint

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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).…”

Section: Introductionunclassified

“…Existen vacíos de información sobre la ecología e historia de vida de muchas de las especies de anfibios (Posso-Peláez et al, 2017), como es el caso de Craugastor berkenbuschii (Peters, 1870), una especie endémica de México considerada especialista de hábitats rocosos ribereños en bosques tropicales y mesófilos de montaña (Pough et al, 2003). Se distribuye entre los 80 y 1900 m.s.n.m.…”

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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Eating to the beat of the drum: vibrational parameters of toe tapping behavior in Dendrobates truncatus (Anura: Dendrobatidae)

Vergara-Herrera,

Cocroft,

Rueda-Solano

2023

Evol Ecol

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Toe tapping is performed by certain anuran species while foraging for their prey. This behavior has been described in different frog families, with some hypotheses regarding its function, including predator-prey communication, still unverified. To understand the function of toe tapping and its potential relationship with foraging in anurans, the present research focuses on descriptive analysis of vibrational parameters of toe tapping produced during foraging in the poison dart frog Dendrobates truncatus. We implemented an experimentally designed arena that allowed us to record toe tapping vibrations using an accelerometer attached to an artificial substrate. Continuous recordings of toe tapping were obtained from 19 individuals, enabling us to identify and define the vibrational parameters, with reference to the time between attacks on prey. The average tap duration was 0.06 ± 0.01 s with an inter-tap interval of 0.15 ± 0.07 s. We also identified a pattern, displayed in 36.5% of the analyzed attacks, of progressive acceleration of toe tapping before an attack. Furthermore, we found that individuals with longer third toes were more likely to accelerate their taps. Lastly, we found no evidence of sexual dimorphism in the toe tapping behavior of Dendrobates truncatus. Describing the vibrational parameters of toe tapping in Dendrobates truncatus represents a new frontier of research in the field of foraging behavior and paves the way for hypothesis testing regarding its functionality.

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Uso de microhábitats, actividad diaria y dieta de Dendrobates truncatus (cope, 1861) (Anura: Dendrobatidae) en bosque seco tropical del norte de Colombia

Cited by 4 publications

References 22 publications

Poison frog diet and chemical defense are influenced by availability and selectivity for ants

Poison frog diet and chemical defense are influenced by availability and selectivity for ants

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

Eating to the beat of the drum: vibrational parameters of toe tapping behavior in Dendrobates truncatus (Anura: Dendrobatidae)

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