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Anuran assemblage and its trophic relations in rice-paddy fields of South India

Seshadri, KS and Allwin, J and Seena, NK and Ganesh, T (2020) Anuran assemblage and its trophic relations in rice-paddy fields of South India. In: Journal of Natural History, 54 (41-42). pp. 2745-2762.

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Official URL: https://doi.org/10.1080/00222933.2020.1867772


Rice-paddy agriculture is widely expanding, particularly in Asia. Rice-paddy fields are stagnated with water and insecticides are applied to control pests. Expansion of agriculture and pesticide are known drivers of declining amphibian populations globally. Yet, several amphibians persist in such temporary wetlands. How amphibians persist in this landscape matrix is not clearly understood. We document amphibian diversity in rice-paddy fields in south India and examine trophic interactions of the two most abundant species. From 60 rice paddy fields, we recorded six species of anurans among which, Minervarya caperata and Microhyla ornata were most abundant. The stomach contents of 57 individuals of the two species were extracted. They consumed prey items belonging to eight orders and 56 taxonomically distinct units dominated by Diptera and Hymenoptera: Formicidae. Although individuals of M. ornata were smaller in body size compared to M. caperata, both species consumed a similar number of arthropods. The dietary niche breadth of M. caperata was wider than M. ornata and the diets of the two species did not overlap greatly. We discuss our findings in the context of prey availability, foraging strategies, and highlight the role of anurans in pest control. © 2021 Informa UK Limited, trading as Taylor & Francis Group.

Item Type: Journal Article
Publication: Journal of Natural History
Publisher: Taylor and Francis Ltd.
Additional Information: The copyright for this article belongs to Taylor and Francis Ltd.
Keywords: Amphibia; Arthropoda; Diptera; Formicidae; Hymenoptera; Microhyla ornata
Department/Centre: Division of Biological Sciences > Centre for Ecological Sciences
Date Deposited: 06 Aug 2021 10:09
Last Modified: 06 Aug 2021 10:09
URI: http://eprints.iisc.ac.in/id/eprint/69152

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