امروز جمعه , 16 شهریور 1403
شنبه تا پنج شنبه - 9 صبح الی 20 عصر
دانلود مقاله : Corncrake males learn new signal meanings during aggressive interactions 2013
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دانلود مقاله :
Corncrake males learn new signal meanings during aggressive interactions 2013
نویسندگان :
Pawe1 Rek
فرمت:pdf
چکیده :
For many animals, the repertoires of songs or calls are relatively small and static during a lifetime. One
reason for this is that there are different physiological limitations in the respiratory, phonatory and filter
systems in different phylogenetic groups. Nevertheless, learning does not have to be associated exclusively
with the acquisition of new vocalizations; individuals may recombine a limited number of elements
already present in an individual’s repertoire into new sequences. I tested the possibility of learning
timing of calls in the corncrake, Crex crex, a nonpasserine bird with an extremely low repertoire of calls,
using temporal patterns of calls during territorial interactions. I tested whether male are able to
comprehend and use a new pattern by connecting known syntax with a new meaning through experience.
Experiments with playback demonstrated that males were able to comprehend a new association
between the temporal pattern and approaching behaviour of the intruder only after a few minutes of
exposure to new circumstances. Additionally, apart from comprehending, males acquired a new signalling
strategy; they began signalling their aggressive motivation using the new association. Because
comprehension and usage of associations between the syntax of vocalizations and the approaching
behaviour of males were modifiable as a result of experience, these results indicate that corncrakes’
innate call structures and lack of complex and variable songs allow them to learn the temporal distribution
of their calls. This suggests a much broader application and a vital role of contextual learning for
the evolution of simple acoustic signalling systems.