Analysis for an Acoustic Survey of Beaked Whales

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Authors
  1. Hood, J.
  2. Bougher, B.
  3. Moors, H.
  4. Paitich, O.
Corporate Authors
Defence Research and Development Canada, Atlantic Research Centre, Halifax NS (CAN);Akoostix Inc, Dartmouth NS (CAN)
Abstract
DRDC Atlantic, with support from the Government of Canada’s Interdepartmental Recovery Fund (IRF), undertook to apply some of the technology developed for the purpose of mitigating the potential impact of active sonars to enhance acoustic characterization of the Northern bottle nose whale (NBW) (Scotian shelf population) critical habitat. Data were collected during the Canadian Forces Auxiliary Vessel (CFAV) Quest Q338 sea trial (26-30 May 2011) where a mixture of towed array, sonobuoy, and passive acoustic reusable buoy (PARB) systems were used to record acoustic signals in the Gully marine protected area (MPA), east of Nova Scotia. The data were analyzed for presence/absence of species of interest and habitat usage maps were generated using the manual detections and GPS information recording position data for each sensor. During analysis, acoustic samples were extracted to provide sample sounds for the DFO catalogue of marine mammal sounds. In addition to data analysis, an improved band-limited automated detector was developed. The detector was configured for species of interest, and used to generate detection records for each sensor deployed during the trial. The results showed that much of the NBW population resides near the mouth of the Gully. NBW detection rate significantly decreased as the survey moved north to the head of the canyon and into the Gully trough.
Keywords
sonar;marine mammal detection
Report Number
DRDC-RDDC-2017-C083 — Contract Report
Date of publication
01 Mar 2012
Number of Pages
53
DSTKIM No
CA044890
CANDIS No
805265
Format(s):
Electronic Document(PDF)

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