Sound production in the Ponto-Caspian goby (Neogobius fluviatilis (Pallas, 1814)) and its acoustic affinity with mediterranean species

Horvatić, Sven (2015) Sound production in the Ponto-Caspian goby (Neogobius fluviatilis (Pallas, 1814)) and its acoustic affinity with mediterranean species. Diploma thesis, Faculty of Science > Department of Biology.

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Abstract

The aim of this study was to describe the vocal repertoire of the Ponto-Caspian goby (Neogobius fluviatilis) and to compare its acoustic properties with those of the other soniferous Mediterranean gobies belonging to the ―Gobius‖ lineage. Sound emission was elicited by means of ―intruder tests‖. 5 acoustic properties were measured from 13 individuals. The vocal repertoire of the species consisted of sequences of short vocalizations (average 200 ms) showing an average fundamental frequency of about 80 Hz during both agonistic and reproductive intraspecific interactions. Sound properties did not differ between reproductive and the aggressive contexts, and the general structure of sounds were highly stereotyped. Discriminant Function Analysis was performed with individual means of five acoustic properties for seven species to assess how well species could be differentiated on the basis of acoustics, and their degree of affinities. The results suggested that the pulse repetition rate of the sounds was the most important property in differentiating the species. The species producing tonal sounds clustered together in line with the results of recent molecular phylogenic studies. The results were discussed in light of the geological and phylogeographic events believed to have driven the diversification of European gobies.

Item Type: Thesis (Diploma thesis)
Keywords: gobies, acoustic properties, Messinian salinity crisis
Supervisor: Zanella, Davor
Date: 2015
Number of Pages: 23
Subjects: NATURAL SCIENCES > Biology
Divisions: Faculty of Science > Department of Biology
Depositing User: Silvana Šehić
Date Deposited: 23 Mar 2016 11:12
Last Modified: 23 Mar 2016 11:12
URI: http://digre.pmf.unizg.hr/id/eprint/4601

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