Acoustic communication in crocodilians: information encoding and species specificity of juvenile calls
| Autor: | Samuel Martin, Amélie L. Vergne, Thierry Aubin, Nicolas Mathevon |
|---|---|
| Přispěvatelé: | Centre de Neurosciences Paris-Sud (CNPS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), La ferme aux crocodiles, réserve tropicale, Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2012 |
| Předmět: |
0106 biological sciences
Nile crocodile Experimental and Cognitive Psychology 010603 evolutionary biology 01 natural sciences biology.animal Encoding (memory) Animals Juvenile 0501 psychology and cognitive sciences 050102 behavioral science & comparative psychology Ecology Evolution Behavior and Systematics Melanosuchus niger Alligators and Crocodiles Communication biology business.industry Repertoire 05 social sciences Acoustics Contact call biology.organism_classification Adaptation Physiological Crocodylus Information coding Evolutionary biology Auditory Perception [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC] Vocalization Animal business |
| Zdroj: | Animal Cognition Animal Cognition, Springer Verlag (Germany), 2012, 15 (6), pp.1095-1109. ⟨10.1007/s10071-012-0533-7⟩ |
| ISSN: | 1435-9456 1435-9448 |
| DOI: | 10.1007/s10071-012-0533-7 |
| Popis: | International audience; In the Crocodylia order, all species are known for their ability to produce sounds in several communication contexts. Though recent experimental studies have brought evidence of the important biological role of young crocodilian calls, especially at hatching time, the juvenile vocal repertoire still needs to be clarified in order to describe thoroughly the crocodilian acoustic communication channel. The goal of this study is to investigate the acoustic features (structure and information coding) in the contact call of juveniles from three different species (Nile crocodile Crocodylus niloticus , Black caiman, Melanosuchus niger and Spectacled caiman, Caiman crocodilus ). We have shown that even though substantial structural differences exist between the calls of different species, they do not seem relevant for crocodilians. Indeed, juveniles and adults from the species studied use a similar and non-species-specific way of encoding information, which relies on frequency modulation parameters. Interestingly, using conditioning experiments, we demonstrated that this tolerance in responses to signals of different acoustic structures was unlikely to be related to a lack of discriminatory abilities. This result reinforced the idea that crocodilians have developed adaptations to use sounds efficiently for communication needs. |
| Databáze: | OpenAIRE |
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