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Optimising stereo baited underwater video for sampling fish and invertebrates in temperate coastal habitats

R.K.F. Unsworth, J.R. Peters, R.M. McCloskey, S.L. Hinder, Richard Unsworth Orcid Logo

Estuarine, Coastal and Shelf Science

Swansea University Author: Richard Unsworth Orcid Logo

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DOI (Published version): 10.1016/j.ecss.2014.03.020

Abstract

Stereo Baited Remote Underwater Video systems (BRUVs) provide a quantitative sampling method for assessing mobile fauna in a range of habitat types and environments. This non-destructive and cost-effective technique is increasingly used for assessing estuarine, coastal and marine fauna. Although sin...

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Published in: Estuarine, Coastal and Shelf Science
Published: 2014
URI: https://cronfa.swan.ac.uk/Record/cronfa17543
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first_indexed 2014-03-26T02:30:28Z
last_indexed 2018-02-09T04:51:16Z
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spelling 2014-06-17T09:33:01.0854634 v2 17543 2014-03-25 Optimising stereo baited underwater video for sampling fish and invertebrates in temperate coastal habitats b0f33acd13a3ab541cf2aaea27f4fc2f 0000-0003-0036-9724 Richard Unsworth Richard Unsworth true false 2014-03-25 SBI Stereo Baited Remote Underwater Video systems (BRUVs) provide a quantitative sampling method for assessing mobile fauna in a range of habitat types and environments. This non-destructive and cost-effective technique is increasingly used for assessing estuarine, coastal and marine fauna. Although single camera systems have been used to assess the relative abundance (Nmax) of marine fish and invertebrates in low visibility North Atlantic near shore and coastal waters, stereo systems remain in their infancy within such environments and their use requires validation. Stereo systems that measure fish and invertebrate size enable size-frequency analysis of populations, providing critical information about life history and population status. We investigated the performance and efficacy of stereo BRUV systems within Welsh shallow coastal waters to test the effectiveness of this method. Data are presented on the capacity of the system to measure fish and invertebrate size under the constraints of low visibility (&#60;2m). We also present data on the required duration of deployment required to effectively sample relative fish abundance and diversity. Our study recorded 19 species of mobile fauna with species-time accumulation curves providing evidence that a minimum deployment time of 1 hour is required to sample 66% of the fish species, and 2 hours to sample 83%. Results suggest that the efficiency of surveys for target species (e.g. gadoids) could be maximised by modifying the sampling duration between 1 hour and 2 hours. The study also demonstrates that measurements of fish and invertebrate length could be taken on 41% of individuals (of those counted in relative abundance measures using Nmax), a statistic that varies between species. This indicates a need to modify the construction of the equipment for improved fish assemblage size frequency analysis. This is particularly relevant in areas and habitats where seine netting and trawling are not possible. We describe how the system can be modified for optimized usage within low visibility waters and suggest potential uses of the system. Journal Article Estuarine, Coastal and Shelf Science 31 12 2014 2014-12-31 10.1016/j.ecss.2014.03.020 COLLEGE NANME Biosciences COLLEGE CODE SBI Swansea University 2014-06-17T09:33:01.0854634 2014-03-25T08:19:07.9347544 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Biosciences R.K.F. Unsworth 1 J.R. Peters 2 R.M. McCloskey 3 S.L. Hinder 4 Richard Unsworth 0000-0003-0036-9724 5
title Optimising stereo baited underwater video for sampling fish and invertebrates in temperate coastal habitats
spellingShingle Optimising stereo baited underwater video for sampling fish and invertebrates in temperate coastal habitats
Richard Unsworth
title_short Optimising stereo baited underwater video for sampling fish and invertebrates in temperate coastal habitats
title_full Optimising stereo baited underwater video for sampling fish and invertebrates in temperate coastal habitats
title_fullStr Optimising stereo baited underwater video for sampling fish and invertebrates in temperate coastal habitats
title_full_unstemmed Optimising stereo baited underwater video for sampling fish and invertebrates in temperate coastal habitats
title_sort Optimising stereo baited underwater video for sampling fish and invertebrates in temperate coastal habitats
author_id_str_mv b0f33acd13a3ab541cf2aaea27f4fc2f
author_id_fullname_str_mv b0f33acd13a3ab541cf2aaea27f4fc2f_***_Richard Unsworth
author Richard Unsworth
author2 R.K.F. Unsworth
J.R. Peters
R.M. McCloskey
S.L. Hinder
Richard Unsworth
format Journal article
container_title Estuarine, Coastal and Shelf Science
publishDate 2014
institution Swansea University
doi_str_mv 10.1016/j.ecss.2014.03.020
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Biosciences{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Biosciences
document_store_str 0
active_str 0
description Stereo Baited Remote Underwater Video systems (BRUVs) provide a quantitative sampling method for assessing mobile fauna in a range of habitat types and environments. This non-destructive and cost-effective technique is increasingly used for assessing estuarine, coastal and marine fauna. Although single camera systems have been used to assess the relative abundance (Nmax) of marine fish and invertebrates in low visibility North Atlantic near shore and coastal waters, stereo systems remain in their infancy within such environments and their use requires validation. Stereo systems that measure fish and invertebrate size enable size-frequency analysis of populations, providing critical information about life history and population status. We investigated the performance and efficacy of stereo BRUV systems within Welsh shallow coastal waters to test the effectiveness of this method. Data are presented on the capacity of the system to measure fish and invertebrate size under the constraints of low visibility (&#60;2m). We also present data on the required duration of deployment required to effectively sample relative fish abundance and diversity. Our study recorded 19 species of mobile fauna with species-time accumulation curves providing evidence that a minimum deployment time of 1 hour is required to sample 66% of the fish species, and 2 hours to sample 83%. Results suggest that the efficiency of surveys for target species (e.g. gadoids) could be maximised by modifying the sampling duration between 1 hour and 2 hours. The study also demonstrates that measurements of fish and invertebrate length could be taken on 41% of individuals (of those counted in relative abundance measures using Nmax), a statistic that varies between species. This indicates a need to modify the construction of the equipment for improved fish assemblage size frequency analysis. This is particularly relevant in areas and habitats where seine netting and trawling are not possible. We describe how the system can be modified for optimized usage within low visibility waters and suggest potential uses of the system.
published_date 2014-12-31T03:20:16Z
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score 11.017797

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