Article

 

Modeling the detection range of fish by echolocating bottlenose dolphins and harbor porpoises Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/articles/ws859m297

Descriptions

Attribute NameValues
Creator
Abstract
  • The target strength as a function of aspect angle were measured for four species of fish using dolphin-like and porpoise-like echolocation signals. The polar diagram of target strength values measured from an energy flux density perspective showed considerably less fluctuation with azimuth than would a pure tone pulse. Using detection range data obtained from dolphin and porpoise echolocation experiments, the detection ranges for the Atlantic cod by echolocating dolphins and porpoises were calculated for three aspect angles of the cod. Maximum detection ranges occurred when the fish was broadside to the odontocete and minimum detection ranges occurred when the cod was in the tail aspect. Maximum and minimum detection ranges for the bottlenose dolphin in a noise-limited environment was calculated to be 93 and 70 m, respectively. In a quiet environment, maximum and minimum detection ranges for the bottlenose dolphin were calculated to be 173 and 107 m, respectively. The detection ranges for the harbor porpoise in a quiet environment were calculated to be between 15 and 27 m. The primary reason for the large differences in detection ranges between both species was attributed to the 36 dB higher source level of the bottlenose dolphin echolocation signals.
Resource Type
Date Available
Date Issued
Journal Title
Journal Volume
  • 121
Journal Issue/Number
  • 6
Academic Affiliation
Keyword
Rights Statement
Funding Statement (additional comments about funding)
  • This work was supported by the US Office of Naval Research, Mardi Hastings, program manager and the Netherlands Ministry for Agriculture, Nature, and Food Quality, DKW-program 418: North Sea and Coast.
Publisher
Language
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2009-09-24T17:23:06Z (GMT). No. of bitstreams: 1 JAcoustSociety2006_Echolocating.pdf: 903992 bytes, checksum: 8dbb844530eba2afca96f1caffc4e107 (MD5) Previous issue date: 2007-06
  • description.provenance : Approved for entry into archive by Kelly Benoit-Bird(kbenoit@coas.oregonstate.edu) on 2009-09-24T17:23:06Z (GMT) No. of bitstreams: 1 JAcoustSociety2006_Echolocating.pdf: 903992 bytes, checksum: 8dbb844530eba2afca96f1caffc4e107 (MD5)
  • description.provenance : Submitted by Linda Lamb (llamb@coas.oregonstate.edu) on 2009-09-24T17:19:38Z No. of bitstreams: 1 JAcoustSociety2006_Echolocating.pdf: 903992 bytes, checksum: 8dbb844530eba2afca96f1caffc4e107 (MD5)
ISSN
  • 0001-4966

Relationships

Parents:

This work has no parents.

Items