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Comparative Analysis of Anti-predator Behaviour and Life History Traits of the Tadpoles Exposed to Predation Risk and Corticosterone

Comparative Analysis of Anti-predator Behaviour and Life History Traits of the Tadpoles Exposed... Anuran tadpoles show behavioural and morphological alterations in the presence of predatory cues (perceived predation risk). Recent studies suggested the possible role of stress hormone corticosterone (CORT) in anti-predator responses. We speculated that the anti-predator responses of prey tadpoles exposed to predation risk and CORT will be similar if they are mediated through CORT. In the present study, we compared behavioural and life history responses of Duttaphrynus melanostictus tadpoles exposed to (i) predatory tadpoles of Hoplobatrachus crassus, and (ii) two concentrations (1 and 10 µg/L) of CORT. The results revealed that exposure of the tadpoles to predation risk and CORT have similar effects on behaviour and life history traits. Tadpoles exposed to predation risk and CORT did not alter behaviour in response to alarm cues. Tadpoles exposed to predation risk and different concentrations of CORT delayed metamorphosis with a reduction in size. CORT influenced metamorphosis and size of the tadpoles in concentration dependent manner. These results suggest that the presence of non-lethal predators affects life history traits possibly through the stress hormone. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Proceedings of the Zoological Society Springer Journals

Comparative Analysis of Anti-predator Behaviour and Life History Traits of the Tadpoles Exposed to Predation Risk and Corticosterone

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Publisher
Springer Journals
Copyright
Copyright © Zoological Society, Kolkata, India 2020
Subject
Life Sciences; Life Sciences, general; Zoology; Animal Anatomy / Morphology / Histology; Animal Genetics and Genomics; Biodiversity; Conservation Biology/Ecology
ISSN
0373-5893
eISSN
0974-6919
DOI
10.1007/s12595-019-00320-7
Publisher site
See Article on Publisher Site

Abstract

Anuran tadpoles show behavioural and morphological alterations in the presence of predatory cues (perceived predation risk). Recent studies suggested the possible role of stress hormone corticosterone (CORT) in anti-predator responses. We speculated that the anti-predator responses of prey tadpoles exposed to predation risk and CORT will be similar if they are mediated through CORT. In the present study, we compared behavioural and life history responses of Duttaphrynus melanostictus tadpoles exposed to (i) predatory tadpoles of Hoplobatrachus crassus, and (ii) two concentrations (1 and 10 µg/L) of CORT. The results revealed that exposure of the tadpoles to predation risk and CORT have similar effects on behaviour and life history traits. Tadpoles exposed to predation risk and CORT did not alter behaviour in response to alarm cues. Tadpoles exposed to predation risk and different concentrations of CORT delayed metamorphosis with a reduction in size. CORT influenced metamorphosis and size of the tadpoles in concentration dependent manner. These results suggest that the presence of non-lethal predators affects life history traits possibly through the stress hormone.

Journal

Proceedings of the Zoological SocietySpringer Journals

Published: Sep 7, 2020

References