Integrating echo-sounder and underwater video data for demersal fish assessment
Effective management of demersal fish species includes accurate, spatially explicit assessments of their abundance and distribution. Non-extractive techniques, such as echo-sounders and visual census, are of particular importance in no-take marine reserves where direct sampling is restricted. This s...
| Main Authors: | , , , , |
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| Format: | Conference Paper |
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2016
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| Online Access: | https://www.acoustics.asn.au/conference_proceedings/AASNZ2016/papers/p45.pdf http://hdl.handle.net/20.500.11937/9648 |
| _version_ | 1848746010395803648 |
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| author | Landero, M. Parnum, Iain Parsons, Miles Salgado-Kent, Chandra Saunders, Ben |
| author_facet | Landero, M. Parnum, Iain Parsons, Miles Salgado-Kent, Chandra Saunders, Ben |
| author_sort | Landero, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Effective management of demersal fish species includes accurate, spatially explicit assessments of their abundance and distribution. Non-extractive techniques, such as echo-sounders and visual census, are of particular importance in no-take marine reserves where direct sampling is restricted. This study is investigating the use of echo-sounders and Baited Remote Underwater stereo-Videos (stereo-BRUVs) in demersal fish assessment. Echo-sounders have the advantage of covering nearly the entire watercolumn and being able to cover vast areas in a relatively short period. However, "ground-truth" data is usually needed to produce species-specific identification and sampling the area close to the seafloor is problematic, particularly for demersal species in complex topography. In contrast, stereo-BRUVs allow identification to species level in most cases, but samples characterise a particular location within the field of view and the area of influence within the bait plume. The combination of co-located bathymetric and habitat maps, with quantifiable acoustic backscatter and species-specific visually ground-truthed relative abundance, holds potential to further these studies and provide a more cost- and labour-efficient sampling regime. The preliminary investigation into the relationship between active acoustic and stereo-BRUVs showed a significant correlation between the relative biomass recorded by the stereo-BRUVs and the acoustic energy recorded by the echosounder. |
| first_indexed | 2025-11-14T06:26:27Z |
| format | Conference Paper |
| id | curtin-20.500.11937-9648 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:26:27Z |
| publishDate | 2016 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-96482017-01-30T11:14:09Z Integrating echo-sounder and underwater video data for demersal fish assessment Landero, M. Parnum, Iain Parsons, Miles Salgado-Kent, Chandra Saunders, Ben Effective management of demersal fish species includes accurate, spatially explicit assessments of their abundance and distribution. Non-extractive techniques, such as echo-sounders and visual census, are of particular importance in no-take marine reserves where direct sampling is restricted. This study is investigating the use of echo-sounders and Baited Remote Underwater stereo-Videos (stereo-BRUVs) in demersal fish assessment. Echo-sounders have the advantage of covering nearly the entire watercolumn and being able to cover vast areas in a relatively short period. However, "ground-truth" data is usually needed to produce species-specific identification and sampling the area close to the seafloor is problematic, particularly for demersal species in complex topography. In contrast, stereo-BRUVs allow identification to species level in most cases, but samples characterise a particular location within the field of view and the area of influence within the bait plume. The combination of co-located bathymetric and habitat maps, with quantifiable acoustic backscatter and species-specific visually ground-truthed relative abundance, holds potential to further these studies and provide a more cost- and labour-efficient sampling regime. The preliminary investigation into the relationship between active acoustic and stereo-BRUVs showed a significant correlation between the relative biomass recorded by the stereo-BRUVs and the acoustic energy recorded by the echosounder. 2016 Conference Paper http://hdl.handle.net/20.500.11937/9648 https://www.acoustics.asn.au/conference_proceedings/AASNZ2016/papers/p45.pdf restricted |
| spellingShingle | Landero, M. Parnum, Iain Parsons, Miles Salgado-Kent, Chandra Saunders, Ben Integrating echo-sounder and underwater video data for demersal fish assessment |
| title | Integrating echo-sounder and underwater video data for demersal fish assessment |
| title_full | Integrating echo-sounder and underwater video data for demersal fish assessment |
| title_fullStr | Integrating echo-sounder and underwater video data for demersal fish assessment |
| title_full_unstemmed | Integrating echo-sounder and underwater video data for demersal fish assessment |
| title_short | Integrating echo-sounder and underwater video data for demersal fish assessment |
| title_sort | integrating echo-sounder and underwater video data for demersal fish assessment |
| url | https://www.acoustics.asn.au/conference_proceedings/AASNZ2016/papers/p45.pdf http://hdl.handle.net/20.500.11937/9648 |