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Sound source localization by the plainfin midshipman fish, Porichthys notatus.

Authors
  • Zeddies, David G
  • Fay, Richard R
  • Alderks, Peter W
  • Shaub, Kiel S
  • Sisneros, Joseph A
Type
Published Article
Journal
The Journal of the Acoustical Society of America
Publication Date
May 01, 2010
Volume
127
Issue
5
Pages
3104–3113
Identifiers
DOI: 10.1121/1.3365261
PMID: 21117759
Source
Medline
License
Unknown

Abstract

The aim of this study was to use plainfin midshipman fish (Porichthys notatus) as a general model to explore how fishes localize an underwater sound source in the relatively simple geometry of a monopole sound field. The robust phonotaxic responses displayed by gravid females toward a monopole sound projector (J-9) broadcasting a low-frequency (90 Hz) tone similar to the fundamental frequency of the male's advertisement call were examined. The projector's sound field was mapped at 5 cm resolution azimuth using an eight-hydrophone array. Acoustic pressure was measured with the array and acoustic particle motion was calculated from pressure gradients between hydrophones. The response pathways of the fish were analyzed from video recordings and compared to the sound field. Gravid females at initial release were directed toward the sound source, and the majority (73%) swam to the playback projector with straight to slightly curved tracks in the direction of the source and in line with local particle motion vectors. In contrast, the initial direction of the control (sound-off) group did not differ from random. This paper reports on a comparison of fish localization behavior with directional cues available in the form of local particle motion vectors.

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