Can Crowd Vocal Learning Induce Local Dialects in Bats Dissertation Example

Discipline:
Biology
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Abstract
Level:
Bachelor's
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2
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550
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Name Instructor Course Date of Submission Can Crowd Vocal Learning Induce Local Dialects in Bats? Experiment Three zoologists, Prat, Azoulay, Dor, and Yovel, conducted a study to determine the ability of mammals, bats specifically, to learn and produce vocalizations through hearing. They caught pregnant female Egyptian fruit bats in wild roots in central Israel. The bats were then assigned to three acoustically isolated and identical chambers randomly. Each female bat gave birth to a single pup in the three chambers. The mothers were released after the pumps were weaned for some few weeks. In each of the three chambers, playbacks of agonistic and conspecific vocalizations were played constantly for a year. Results The pups in each of the three chambers developed three distinct vocal dialects. The acoustic differences between the pups were related to the playbacks. At the young age of 12 to 18 weeks, the pups exposed to the playbacks develop large variability without significant distinctions among the three groups. When the pups were at the maturity stage, the groups in each of the three chambers became significantly separable acoustically evident through the permutation tests for the linear discriminabilities of p = 3.2 × 10-5, p = 0.0075, and p = 5.6 × 10-5 at the stages of 31 to 35, 40 to 43, and 48 to 51 weeks respectively. Conclusion Due to the auditory experience and established dialects through agonistic and conspecific vocalization of playbacks led to the formation of local dialects in the bats. The established dialects had both the direct connections with and effects on the acoustic parameters for the local dialects of the pups. The local dialects of the pups were based on the different fundamental frequencies of the playbacks used. Source Prat, Yosef, Lindsay Azoulay, Roi Dor, and Yossi Yovel. "Crowd vocal learning induces vocal dialects in bats: Playback of conspecifics shapes fundamental frequency usage by pups." PLoS biology...
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