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      Composición de la dieta de Craugastor lineatus (Anura: Craugastoridae) de Chiapas, México Translated title: Diet composition of Craugastor lineatus (Anura: Craugastoridae) of Chiapas, Mexico

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          Abstract

          Se describen los cambios ontogenéticos y estacionales de la dieta de Craugastor lineatus de Chiapas, México. De 54 contenidos estomacales de nueve juveniles, 38 machos y siete hembras, recuperamos 121 presas que representan 22 categorías de alimento. De estas, arañas, coleópteros, hormigas, isópodos, ortópteros, quilópodos y materia vegetal fueron las más importantes. El tamaño máximo de la presa estuvo relacionado positivamente con el tamaño de la rana, mientras que la relación con el número de presas fue negativa. Asimismo, los juveniles consumieron más coleópteros e isópodos que los adultos, quienes seleccionaron arañas, ortópteros y quilópodos. En la época húmeda encontramos 16 categorías de alimento, de las que ácaros, dípteros, isópteros y lepidópteros fueron exclusivas, mientras que en la época seca fueron 18 categorías, con diplópodos, fásmidos, odonatos, socópteros y seudoes-corpiones como exclusivas.

          Translated abstract

          The ontogenetic and seasonal changes in the diet of Craugastor lineatus from Chiapas, México were described. We obtained 121 prey items from 54 stomachs by dissection, prey and prey parts were counted and identified to ordinal level. Twenty two food categories were identified. Frogs consumed mainly Aranae, Chilopoda, Coleoptera, Hymenoptera, Isopoda, Orthoptera, and plants, although the representation of each category varied ontogenetically and temporally. The maximum length of the prey items was positively correlated with frog body size; meanwhile, the number of prey items was negatively correlated with frog body size. Juveniles consumed more Coleoptera and Isopoda, while adults captured more Aranae, Orthoptera and Chilopoda. Sixteen items were consumed in wet season, with Diptera, Isoptera, Lepidoptera and Acari as exclusive. During the dry season were ingested 18 items, with Phasmatoidea, Odonata, Psocoptera, Diplopoda and Pseudoescorpionida as exclusive.

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          Resource Partitioning in Amphibians and Reptiles

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            Feeding ecology of thirteen syntopic species of anurans in a seasonal tropical environment.

            Thirteen species of anurans belonging to three families forage diurnally for arthropods in the leaf litter of the lowland rainforest at the Río Llullapichis in Amazonian Perú. This paper investigates the diets and patterns of coexistence in this group of ecologically similar species. All thirteen species use the forest floor habitat without apparent differentiation. Most species take prey in proportions significantly different from those occurring in the leaf litter and comprise two specialist guilds: dendrobatids and bufonids that eat hard-bodied, slow-moving arthropods such as ants and mites; and leptodactylids that eat soft-bodied, mobile arthropods, primarily orthopterans and large spiders. Dendrobates femoralis (Boulenger) is a generalist, taking prey in proportions not significantly different from those in the leaf litter. Within specialist guilds, body sizes of species vary and are correlated with the size of prey taken. Foraging behavior and predator defense also correlate with the type and sizes of prey taken. Ant specialists tend to be poisonous and active searchers, taking many small prey per day. Non-ant specialists are cryptic, sit-and-wait foragers that take few large prey per day. Similarity in diet within guilds tends tobe lowest in the dry season when food is less abundant, suggesting that food is in short supply in the dry season.
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              Feeding Ecology of Panamanian Litter Anurans: Patterns in Diet and Foraging Mode

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                Author and article information

                Journal
                azm
                Acta zoológica mexicana
                Acta Zool. Mex
                Instituto de Ecología A.C. (Xalapa, Veracruz, Mexico )
                0065-1737
                2448-8445
                August 2011
                : 27
                : 2
                : 215-230
                Affiliations
                [02] Tuxtla Gutiérrez Chiapas orgnameUniversidad de Ciencias y Artes de Chiapas orgdiv1Escuela de Biología
                [01] México D. F orgnameUniversidad Autónoma Metropolitana orgdiv1Departamento de Biología orgdiv2Unidad Iztapalapa marti17@ 123456hotmail.com
                Article
                S0065-17372011000200001 S0065-1737(11)02700200001
                10.21829/azm.2011.272749
                48202c89-7f23-4b54-9969-491148a6722f

                This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

                History
                : 22 February 2011
                : 01 December 2008
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 39, Pages: 16
                Product

                SciELO Mexico

                Categories
                Artículos originales

                Chiapas,Craugastor lineatus,diet,onotogenetic change,seasonal change,dieta,cambio ontogenético,cambio estacional

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