Source levels of dugong (dugong dugon) vocalizations recorded in Shark Bay
Dugongs (Dugong dugon) spend significant time in shallow, turbid waters and are often active at night, conditions which are not conducive to visual cues. In part, as a result, dugongs vocalize to gain or pass information. Passive acoustic recording is a useful tool for remote detection of vocal mari...
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| Format: | Journal Article |
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Acoustical Soceity of America
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/40071 |
| _version_ | 1848755766436036608 |
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| author | Parsons, Miles Holley, Dave McCauley, Robert |
| author_facet | Parsons, Miles Holley, Dave McCauley, Robert |
| author_sort | Parsons, Miles |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Dugongs (Dugong dugon) spend significant time in shallow, turbid waters and are often active at night, conditions which are not conducive to visual cues. In part, as a result, dugongs vocalize to gain or pass information. Passive acoustic recording is a useful tool for remote detection of vocal marine animals, but its application to dugongs has been little explored compared with other mammals. Aerial surveys, often used to monitor dugong distribution and abundance, are not always financially or logistically viable and involve inherent availability and perception bias considerations. Passive acoustic monitoring is also subject to sampling biases and a first step to identifying these biases and understanding the detection or communication range of animal calls is to determine call source level. In March 2012, four dugongs were fitted with satellite tags in Shark Bay, Western Australia by the Department of Environment and Conservation. During this, acoustic recordings were taken at 5.1 m range. Source levels for each of five call types (two types of chirp, bark, squeak, and quack) were estimated, assuming spherical spreading as the transmission loss. Mean source levels for these call types were 139 (n = 19), 135 (12), 142 (2), 158 (1), and 136 (9) dB re 1 μPa at 1 m, respectively. |
| first_indexed | 2025-11-14T09:01:31Z |
| format | Journal Article |
| id | curtin-20.500.11937-40071 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:01:31Z |
| publishDate | 2013 |
| publisher | Acoustical Soceity of America |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-400712017-09-13T15:06:35Z Source levels of dugong (dugong dugon) vocalizations recorded in Shark Bay Parsons, Miles Holley, Dave McCauley, Robert vocalize dugongs dugon Dugongs (Dugong dugon) spend significant time in shallow, turbid waters and are often active at night, conditions which are not conducive to visual cues. In part, as a result, dugongs vocalize to gain or pass information. Passive acoustic recording is a useful tool for remote detection of vocal marine animals, but its application to dugongs has been little explored compared with other mammals. Aerial surveys, often used to monitor dugong distribution and abundance, are not always financially or logistically viable and involve inherent availability and perception bias considerations. Passive acoustic monitoring is also subject to sampling biases and a first step to identifying these biases and understanding the detection or communication range of animal calls is to determine call source level. In March 2012, four dugongs were fitted with satellite tags in Shark Bay, Western Australia by the Department of Environment and Conservation. During this, acoustic recordings were taken at 5.1 m range. Source levels for each of five call types (two types of chirp, bark, squeak, and quack) were estimated, assuming spherical spreading as the transmission loss. Mean source levels for these call types were 139 (n = 19), 135 (12), 142 (2), 158 (1), and 136 (9) dB re 1 μPa at 1 m, respectively. 2013 Journal Article http://hdl.handle.net/20.500.11937/40071 10.1121/1.4816583 Acoustical Soceity of America fulltext |
| spellingShingle | vocalize dugongs dugon Parsons, Miles Holley, Dave McCauley, Robert Source levels of dugong (dugong dugon) vocalizations recorded in Shark Bay |
| title | Source levels of dugong (dugong dugon) vocalizations recorded in Shark Bay |
| title_full | Source levels of dugong (dugong dugon) vocalizations recorded in Shark Bay |
| title_fullStr | Source levels of dugong (dugong dugon) vocalizations recorded in Shark Bay |
| title_full_unstemmed | Source levels of dugong (dugong dugon) vocalizations recorded in Shark Bay |
| title_short | Source levels of dugong (dugong dugon) vocalizations recorded in Shark Bay |
| title_sort | source levels of dugong (dugong dugon) vocalizations recorded in shark bay |
| topic | vocalize dugongs dugon |
| url | http://hdl.handle.net/20.500.11937/40071 |