Acoustic behavior of dolphins in the Pacific Ocean: Implications for using passive acoustic methods for population studies

Authors

  • Shannon Rankin Southwest Fisheries Science Center, 8604 La Jolla Shores Drive, San Diego, CA 92037
  • Julie N. Oswald Scripps Institution of Oceanography, University of California San Diego, San Diego, CA 92038
  • Jay Barlow Southwest Fisheries Science Center, 8604 La Jolla Shores Drive, San Diego, CA 92037

Keywords:

Bubbles (in fluids), Dolphins (structures), Population statistics, Vibrations (mechanical), Acoustic behaviors, Passive acoustics

Abstract

The Southwest Fisheries Science Center has been conducting shipboard visual line-transect cetacean surveys for over 30 years, and combined visual and acoustic surveys for seven years. Full incorporation of passive acoustics as a tool for population assessment requires an understanding of the acoustic behavior of cetaceans as well as the limitations of the methods used in these surveys. Our research summarizes data collected during seven years of combined visual and acoustic surveys throughout the central and eastern North Pacific Ocean, ranging from the Aleutian Island chain in the north, to Peru in the south. Phonations from 2.034 dolphin schools were examined to better understand the acoustic behavior of cetaceans. Equally important are the cetacean schools that were seen but not heard, and this analysis includes an examination of these groups by species, group size, geographic location, and time of day. The results of this analysis allow us to take the first steps to incorporate passive acoustics into line-transect cetacean surveys.

Additional Files

Published

2008-03-01

How to Cite

1.
Rankin S, Oswald JN, Barlow J. Acoustic behavior of dolphins in the Pacific Ocean: Implications for using passive acoustic methods for population studies. Canadian Acoustics [Internet]. 2008 Mar. 1 [cited 2024 Apr. 18];36(1):88-92. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1996

Issue

Vol. 36 No. 1 (2008)

Section

Proceedings of the Acoustics Week in Canada

License

Author Licensing Addendum

This Licensing Addendum ("Addendum") is entered into between the undersigned Author(s) and Canadian Acoustics journal published by the Canadian Acoustical Association (hereinafter referred to as the "Publisher"). The Author(s) and the Publisher agree as follows:

  1. Retained Rights: The Author(s) retain(s) the following rights:

    • The right to reproduce, distribute, and publicly display the Work on the Author's personal website or the website of the Author's institution.
    • The right to use the Work in the Author's teaching activities and presentations.
    • The right to include the Work in a compilation for the Author's personal use, not for sale.

  2. Grant of License: The Author(s) grant(s) to the Publisher a worldwide exclusive license to publish, reproduce, distribute, and display the Work in Canadian Acoustics and any other formats and media deemed appropriate by the Publisher.

  3. Attribution: The Publisher agrees to include proper attribution to the Author(s) in all publications and reproductions of the Work.

  4. No Conflict: This Addendum is intended to be in harmony with, and not in conflict with, the terms and conditions of the original agreement entered into between the Author(s) and the Publisher.

  5. Copyright Clause: Copyright on articles is held by the Author(s). The corresponding Author has the right to grant on behalf of all Authors and does grant on behalf of all Authors, a worldwide exclusive license to the Publisher and its licensees in perpetuity, in all forms, formats, and media (whether known now or created in the future), including but not limited to the rights to publish, reproduce, distribute, display, store, translate, create adaptations, reprints, include within collections, and create summaries, extracts, and/or abstracts of the Contribution.