Bioacoustics supports genus identification in piranhasa)

Area of Science:

• Ichthyology
• Bioacoustics
• Animal Communication

Background:

• Teleost fishes, including piranhas, use complex sound production for communication.
• Pygocentrus and Serrasalmus genera of piranhas produce similar pulsed sounds via the same mechanism.
• Understanding acoustic differences is crucial for distinguishing between closely related species.

Purpose of the Study:

• To investigate if piranha sounds can be used to discriminate between species and genera.
• To analyze temporal and frequency data of piranha vocalizations.
• To determine the taxonomic utility of acoustic features in piranhas.

Main Methods:

• Analysis of acoustic data from three Pygocentrus and nine Serrasalmus species.
• Examination of temporal features (e.g., duration, pulse period) and frequency characteristics.
• Correction of acoustic data for standard fish length.

Main Results:

• Piranha sounds exhibit species-specific characteristics.
• Distinct acoustic features allow differentiation at the genus level.
• Serrasalmus species produce shorter, louder sounds with shorter pulse periods compared to Pygocentrus.

Conclusions:

• Piranha vocalizations can reliably distinguish between species.
• Acoustic analysis supports piranha taxonomy at both species and genus levels.
• Sound characteristics provide valuable insights into piranha communication and evolution.