Folivory and seasonal changes in diet in Rana hexadactyla (Anura: Ranidae)
ABSTRACT The autecology of Rana hexadactyla (Lesson) was studied at a seasonal locality in south India. The herbivorous larva transforms into an insectivorous frog, and a second dietary switch from insectivory to folivory occurs in adults, with plants constituting 79.5% of the diet, by volume. A variety of invertebrates and small vertebrates is consumed, especially by the adult females before the reproductive season. Larger frogs take larger animal prey and more prey types. Monthly figures of prey diversity generally show high values during the wet months.In Rana hexadactyla, the utilization of permanent waterbodies may help buffer the impact of the long dry seasons and, together with a supply of abundant food in the form of aquatic macrophytes, is thought to be linked to the capacity of the species to spawn three times a year.
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ABSTRACT: Leptodactylus mystaceus is distributed throughout Brazil and no information is available about its diet. Here, we analyzed the diet of L. mystaceus from Novo Progresso, Pará, Brazil. We extracted the stomachs of 25 specimens. For each prey category, we calculated the frequency (Fi%), volume (Vi%) and Feeding Index (IAi). Among the specimens analyzed, seven (28%) had empty stomachs and the other ingested eight prey categories (Araneae, Blattodea, Coleoptera, Dermaptera, Diptera adults, Diptera larva, Formicidae, and Lepidoptera), and large amounts of plant material. This suggests that L. mystaceus is a generalist species and Dermaptera was the most representative component of its diet.Herpetology Notes 02/2014; 7:31-36.
Dataset: SAJH 1 2 121 130-1
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ABSTRACT: Amphibians are usually generalist predators, and their diet is influenced by extrinsic (e.g. food availability) and intrinsic factors (e.g. body size and skull shape). This study aims to describe the diet of adult males and females of Leptodactylus fuscus in the Pantanal of the Miranda river and to answer the following questions: i) Are prey's maximum size and number of food items explained by the anuran's body size? ii) Are richness of morphospecies and number of food items explained by frog sex? iii) Is there diet overlap between male and female? We recorded 62 food items, belonging to seven orders of Arthropoda, and one individual of Annelida. The diet of L. fuscus was dominated by Orthoptera, followed by Coleoptera, Araneae, Hymenoptera, Blattaria, Hemiptera and Diptera. Frog's body size did not influence prey size or number of food items consumed. The number of prey and richness of morphospecies did not differ between males and females. There was low diet overlap between the sexes. Our results provide evidence for the opportunistic and generalist feeding behavior of L. fuscus.Biota Neotropica 03/2012; 12(1):99-104. · 0.66 Impact Factor