Passive acoustic detection of Shark Bay dugons (Dugon dugon)
Shark Bay, Western Australia is home to the one of the largest populations of dugongs (Dugong dugon) in the world. During winter months the dugongs predominantly reside in warmer western and northern waters of the gulfs, moving south between September and October as the shallower, more southern wate...
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| Format: | Conference Paper |
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Acoustical Society of Australia
2012
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| Online Access: | http://www.acoustics.asn.au/conference_proceedings/AAS2012/papers/p20.pdf http://hdl.handle.net/20.500.11937/20017 |
| _version_ | 1848750192379035648 |
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| author | Parsons, Miles Holley, D. McCauley, Robert |
| author2 | Terrance McMinn |
| author_facet | Terrance McMinn Parsons, Miles Holley, D. McCauley, Robert |
| author_sort | Parsons, Miles |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Shark Bay, Western Australia is home to the one of the largest populations of dugongs (Dugong dugon) in the world. During winter months the dugongs predominantly reside in warmer western and northern waters of the gulfs, moving south between September and October as the shallower, more southern waters warm. Two underwater noise loggers, sampling at 12 kHz were deployed off Guichenault Point and Skipjack Point in Shark Bay's eastern gulf between the 16th September and 21st October, 2011 to record sounds produced in waters between 4 and 15 m depth. Speculated dugong calls were recorded sporadically throughout the deployment. However, on the 4th and 5th October several hours of biological 'short chirps' were recorded by the Guichenault Point logger. These calls displayed similar acoustic characteristics to chirps in previous reports, though of much shorter duration. Maximum received levels of 134 dB re 1µPa (±5.2 s.d., max = 143.3, min = 123.8) and maximum received sound exposure levels 114 dB re 1µPa2.s (±5.3 s.d., max = 121.9, min = 103.4) were observed from 40 calls. Mean spectral peak frequency of 333 Hz (±316, max = 3610, min = 1957) with a 6 dB down bandwidth of 2746 Hz (±1685, max = 5250, min = 731) over a duration of 0.2 s (±0.17, max = 0.7, min = 0.004) were observed over the group of calls. The calls were also split into 3 smaller types and the acoustic characteristics of these speculated dugong calls are discussed. |
| first_indexed | 2025-11-14T07:32:55Z |
| format | Conference Paper |
| id | curtin-20.500.11937-20017 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:32:55Z |
| publishDate | 2012 |
| publisher | Acoustical Society of Australia |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-200172017-01-30T12:16:55Z Passive acoustic detection of Shark Bay dugons (Dugon dugon) Parsons, Miles Holley, D. McCauley, Robert Terrance McMinn gulf acoustic shark bay dugons Shark Bay, Western Australia is home to the one of the largest populations of dugongs (Dugong dugon) in the world. During winter months the dugongs predominantly reside in warmer western and northern waters of the gulfs, moving south between September and October as the shallower, more southern waters warm. Two underwater noise loggers, sampling at 12 kHz were deployed off Guichenault Point and Skipjack Point in Shark Bay's eastern gulf between the 16th September and 21st October, 2011 to record sounds produced in waters between 4 and 15 m depth. Speculated dugong calls were recorded sporadically throughout the deployment. However, on the 4th and 5th October several hours of biological 'short chirps' were recorded by the Guichenault Point logger. These calls displayed similar acoustic characteristics to chirps in previous reports, though of much shorter duration. Maximum received levels of 134 dB re 1µPa (±5.2 s.d., max = 143.3, min = 123.8) and maximum received sound exposure levels 114 dB re 1µPa2.s (±5.3 s.d., max = 121.9, min = 103.4) were observed from 40 calls. Mean spectral peak frequency of 333 Hz (±316, max = 3610, min = 1957) with a 6 dB down bandwidth of 2746 Hz (±1685, max = 5250, min = 731) over a duration of 0.2 s (±0.17, max = 0.7, min = 0.004) were observed over the group of calls. The calls were also split into 3 smaller types and the acoustic characteristics of these speculated dugong calls are discussed. 2012 Conference Paper http://hdl.handle.net/20.500.11937/20017 http://www.acoustics.asn.au/conference_proceedings/AAS2012/papers/p20.pdf Acoustical Society of Australia fulltext |
| spellingShingle | gulf acoustic shark bay dugons Parsons, Miles Holley, D. McCauley, Robert Passive acoustic detection of Shark Bay dugons (Dugon dugon) |
| title | Passive acoustic detection of Shark Bay dugons (Dugon dugon) |
| title_full | Passive acoustic detection of Shark Bay dugons (Dugon dugon) |
| title_fullStr | Passive acoustic detection of Shark Bay dugons (Dugon dugon) |
| title_full_unstemmed | Passive acoustic detection of Shark Bay dugons (Dugon dugon) |
| title_short | Passive acoustic detection of Shark Bay dugons (Dugon dugon) |
| title_sort | passive acoustic detection of shark bay dugons (dugon dugon) |
| topic | gulf acoustic shark bay dugons |
| url | http://www.acoustics.asn.au/conference_proceedings/AAS2012/papers/p20.pdf http://hdl.handle.net/20.500.11937/20017 |