Exploring Antipredator Mechanisms: New Findings in Ceratophryid Tadpoles
| Autor: | Vance L. Trudeau, Guillermo Sebastián Natale, Alicia Estela Ronco, Carolina Salgado Costa |
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| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine Otras Ciencias Biológicas Underwater sound emission Predator-prey interactions 010603 evolutionary biology 01 natural sciences Intraspecific competition Predation Ciencias Biológicas 03 medical and health sciences Cannibalism Ceratophrys ornata american_football Ecology Evolution Behavior and Systematics Lepidobatrachus llanensis tadpoles Larva Ceratophrys biology Ecology biology.organism_classification Horned frogs 030104 developmental biology Animal Science and Zoology Lepidobatrachus llanensis american_football.team CIENCIAS NATURALES Y EXACTAS |
| Zdroj: | Journal of Herpetology. 50:233-238 |
| ISSN: | 0022-1511 |
| DOI: | 10.1670/14-179 |
| Popis: | Previous studies found that two larvae of the family Ceratophryidae, Ceratophrys ornata (Ornate Horned Frogs) and Ceratophrys cranwelli (Cranwell's Horned Frogs), are able to produce underwater sounds as an antipredator strategy. Here, we determined whether tadpoles of another ceratophryid, Lepidobatrachus llanensis (Llanos Frogs), also produce underwater sounds in similar contexts of intraspecific interactions. Moreover, to compare the mechanism displayed by Ceratophrys spp. with related species, we tested the existence of an antipredator mechanism (= behavior) in L. llanensis tadpoles that diminishes the frequency of predation between conspecifics in the presence of heterospecific prey. Lepidobatrachus llanensis tadpoles exhibited an antipredator mechanism that is displayed on intraspecific interactions. Extensive trials failed to reveal sound production (in the 20 hertz Hz-20 kilohertz kHz range) in L. llanensis, contrasting our observations on Ceratophrys spp. Nevertheless, L. llanensis tadpoles recognized conspecifics because they consistently avoided each other. Under the experimental conditions described, we found L. llanensis tadpoles first eat all heterospecific prey and only then switch to cannibalism. Tadpoles began eating conspecifics only when prey were scarce and after a period of hunger. Moreover, cannibalistic events increased at higher predator-prey proportions. When comparing the number of events of cannibalism recorded for L. llanensis and the related C. cranwelli, under the same experimental conditions, we concluded that L. llanensis cannibalize 1.5 times more often. The genus Lepidobatrachus has distinctive and unique morphological characters that are divergent from its relatives (Ceratophrys, Chacophrys). The antipredator mechanism in L. llanensis contrasts those of Ceratophrys spp. and may be yet another differing characteristic of this group. Fil: Salgado Costa, Carolina. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Trudeau, Vance L.. University of Ottawa; Canadá Fil: Ronco, Alicia Estela. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Natale, Guillermo Sebastian. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de Química; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina |
| Databáze: | OpenAIRE |
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