Visualizing Samsonfish (Seriola hippos) with a Reson 7125 Seabat multibeam sonar
In Western Australia, aggregations of Samsonfish (Seriola hippos) form each summer to spawn in waters west of Rottnest Island. In this study, a Reson 7125 Seabat multibeam sonar (400 kHz) was pole mounted aboard a 21.6 m vessel, conducting acoustic transects to acquire acoustic backscatter simultane...
| Main Authors: | , , |
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| Format: | Journal Article |
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Oxford University Press 2009
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/49077 |
| _version_ | 1848758160042491904 |
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| author | Parsons, Miles Parnum, Iain McCauley, Robert |
| author_facet | Parsons, Miles Parnum, Iain McCauley, Robert |
| author_sort | Parsons, Miles |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | In Western Australia, aggregations of Samsonfish (Seriola hippos) form each summer to spawn in waters west of Rottnest Island. In this study, a Reson 7125 Seabat multibeam sonar (400 kHz) was pole mounted aboard a 21.6 m vessel, conducting acoustic transects to acquire acoustic backscatter simultaneously from a midwater aggregation of S. hippos and the wreck it surrounded. The processedbackscatter produced high-resolution visualizations of both the fish and seabed. During a 15 min period, the centroid of the aggregation moved 91 m around the eastern and northeastern side of the wreck and probably exhibited lateral vessel avoidance behaviour from the survey vessel. Additionally, a ortheasterly current at the site was inferred from subtle habitat features, suggesting that at thetime of the survey the aggregation preferred to remain upcurrent of the wreck. These findings confirmed that the S. hippos aggregations do not necessarily remain directly above the wrecks and do not always remain sedentary. Aggregation acoustic density packing at the survey site was observed at 12.7+2.4 m3 per fish, equivalent to 1.6+0.1 body lengths nearest-neighbour distance. |
| first_indexed | 2025-11-14T09:39:34Z |
| format | Journal Article |
| id | curtin-20.500.11937-49077 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:39:34Z |
| publishDate | 2013 |
| publisher | Oxford University Press 2009 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-490772017-09-13T21:24:49Z Visualizing Samsonfish (Seriola hippos) with a Reson 7125 Seabat multibeam sonar Parsons, Miles Parnum, Iain McCauley, Robert fisheries multibeam habitat classification backscatter In Western Australia, aggregations of Samsonfish (Seriola hippos) form each summer to spawn in waters west of Rottnest Island. In this study, a Reson 7125 Seabat multibeam sonar (400 kHz) was pole mounted aboard a 21.6 m vessel, conducting acoustic transects to acquire acoustic backscatter simultaneously from a midwater aggregation of S. hippos and the wreck it surrounded. The processedbackscatter produced high-resolution visualizations of both the fish and seabed. During a 15 min period, the centroid of the aggregation moved 91 m around the eastern and northeastern side of the wreck and probably exhibited lateral vessel avoidance behaviour from the survey vessel. Additionally, a ortheasterly current at the site was inferred from subtle habitat features, suggesting that at thetime of the survey the aggregation preferred to remain upcurrent of the wreck. These findings confirmed that the S. hippos aggregations do not necessarily remain directly above the wrecks and do not always remain sedentary. Aggregation acoustic density packing at the survey site was observed at 12.7+2.4 m3 per fish, equivalent to 1.6+0.1 body lengths nearest-neighbour distance. 2013 Journal Article http://hdl.handle.net/20.500.11937/49077 10.1093/icesjms/fst009 Oxford University Press 2009 unknown |
| spellingShingle | fisheries multibeam habitat classification backscatter Parsons, Miles Parnum, Iain McCauley, Robert Visualizing Samsonfish (Seriola hippos) with a Reson 7125 Seabat multibeam sonar |
| title | Visualizing Samsonfish (Seriola hippos) with a Reson 7125 Seabat multibeam sonar |
| title_full | Visualizing Samsonfish (Seriola hippos) with a Reson 7125 Seabat multibeam sonar |
| title_fullStr | Visualizing Samsonfish (Seriola hippos) with a Reson 7125 Seabat multibeam sonar |
| title_full_unstemmed | Visualizing Samsonfish (Seriola hippos) with a Reson 7125 Seabat multibeam sonar |
| title_short | Visualizing Samsonfish (Seriola hippos) with a Reson 7125 Seabat multibeam sonar |
| title_sort | visualizing samsonfish (seriola hippos) with a reson 7125 seabat multibeam sonar |
| topic | fisheries multibeam habitat classification backscatter |
| url | http://hdl.handle.net/20.500.11937/49077 |