Assessment of Finfish Aquaculture Effect on Newfoundland Epibenthic Communities through Video Monitoring
Abstract In Newfoundland fjords, evaluating changes to benthic communities resulting from finfish aquaculture is difficult because the depth (>30 m) and presence of patches of hard substrates at production sites hinder grab sampling. In this study, we used video surveys to characterize benthic as...
Published in: | North American Journal of Aquaculture |
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Language: | English |
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Online Access: | http://dx.doi.org/10.1080/15222055.2014.976681 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1080/15222055.2014.976681 |
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crwiley:10.1080/15222055.2014.976681 2024-09-15T18:20:01+00:00 Assessment of Finfish Aquaculture Effect on Newfoundland Epibenthic Communities through Video Monitoring Hamoutene, Dounia Salvo, Flora Bungay, Terrence Mabrouk, Gehan Couturier, Cyr Ratsimandresy, Andry Dufour, Suzanne C. 2015 http://dx.doi.org/10.1080/15222055.2014.976681 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1080/15222055.2014.976681 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor North American Journal of Aquaculture volume 77, issue 2, page 117-127 ISSN 1522-2055 1548-8454 journal-article 2015 crwiley https://doi.org/10.1080/15222055.2014.976681 2024-07-09T04:13:37Z Abstract In Newfoundland fjords, evaluating changes to benthic communities resulting from finfish aquaculture is difficult because the depth (>30 m) and presence of patches of hard substrates at production sites hinder grab sampling. In this study, we used video surveys to characterize benthic assemblages at sites with no aquaculture, with varying amounts of finfish production, and undergoing fallowing periods. Video analyses revealed a patchy distribution of benthic organisms (identifiable at a high taxonomic level), characterized by low natural abundances and richness. Benthic communities at aquaculture sites showed evidence of organic matter enrichment through the presence of Beggiatoa sp. or opportunistic polychaete‐dominated assemblages (or both), bare stations, flocculent matter, and lower abundances and richness near aquaculture cages. Maps of sites in production showed that the area of aquaculture impact was influenced by bathymetry, located underneath cages and in some instances up to 145 m away from net‐pens, and often directed away from the coastline. However, correlations of abundances and richness with distance from cage were weak, and stations close to cages were not always statistically different from stations further away or at the nonproduction site. At the fallow site, a large percentage (∼70%) of stations was barren, suggesting potentially hypoxic or anoxic conditions and warranting further investigations of fallow periods. Our analysis confirms that video‐based assessments can detect major aquaculture‐related changes in benthic communities but cannot, at present, identify lower levels of disturbance. Article in Journal/Newspaper Newfoundland Wiley Online Library North American Journal of Aquaculture 77 2 117 127 |
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English |
description |
Abstract In Newfoundland fjords, evaluating changes to benthic communities resulting from finfish aquaculture is difficult because the depth (>30 m) and presence of patches of hard substrates at production sites hinder grab sampling. In this study, we used video surveys to characterize benthic assemblages at sites with no aquaculture, with varying amounts of finfish production, and undergoing fallowing periods. Video analyses revealed a patchy distribution of benthic organisms (identifiable at a high taxonomic level), characterized by low natural abundances and richness. Benthic communities at aquaculture sites showed evidence of organic matter enrichment through the presence of Beggiatoa sp. or opportunistic polychaete‐dominated assemblages (or both), bare stations, flocculent matter, and lower abundances and richness near aquaculture cages. Maps of sites in production showed that the area of aquaculture impact was influenced by bathymetry, located underneath cages and in some instances up to 145 m away from net‐pens, and often directed away from the coastline. However, correlations of abundances and richness with distance from cage were weak, and stations close to cages were not always statistically different from stations further away or at the nonproduction site. At the fallow site, a large percentage (∼70%) of stations was barren, suggesting potentially hypoxic or anoxic conditions and warranting further investigations of fallow periods. Our analysis confirms that video‐based assessments can detect major aquaculture‐related changes in benthic communities but cannot, at present, identify lower levels of disturbance. |
format |
Article in Journal/Newspaper |
author |
Hamoutene, Dounia Salvo, Flora Bungay, Terrence Mabrouk, Gehan Couturier, Cyr Ratsimandresy, Andry Dufour, Suzanne C. |
spellingShingle |
Hamoutene, Dounia Salvo, Flora Bungay, Terrence Mabrouk, Gehan Couturier, Cyr Ratsimandresy, Andry Dufour, Suzanne C. Assessment of Finfish Aquaculture Effect on Newfoundland Epibenthic Communities through Video Monitoring |
author_facet |
Hamoutene, Dounia Salvo, Flora Bungay, Terrence Mabrouk, Gehan Couturier, Cyr Ratsimandresy, Andry Dufour, Suzanne C. |
author_sort |
Hamoutene, Dounia |
title |
Assessment of Finfish Aquaculture Effect on Newfoundland Epibenthic Communities through Video Monitoring |
title_short |
Assessment of Finfish Aquaculture Effect on Newfoundland Epibenthic Communities through Video Monitoring |
title_full |
Assessment of Finfish Aquaculture Effect on Newfoundland Epibenthic Communities through Video Monitoring |
title_fullStr |
Assessment of Finfish Aquaculture Effect on Newfoundland Epibenthic Communities through Video Monitoring |
title_full_unstemmed |
Assessment of Finfish Aquaculture Effect on Newfoundland Epibenthic Communities through Video Monitoring |
title_sort |
assessment of finfish aquaculture effect on newfoundland epibenthic communities through video monitoring |
publisher |
Wiley |
publishDate |
2015 |
url |
http://dx.doi.org/10.1080/15222055.2014.976681 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1080/15222055.2014.976681 |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
North American Journal of Aquaculture volume 77, issue 2, page 117-127 ISSN 1522-2055 1548-8454 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1080/15222055.2014.976681 |
container_title |
North American Journal of Aquaculture |
container_volume |
77 |
container_issue |
2 |
container_start_page |
117 |
op_container_end_page |
127 |
_version_ |
1810458374027870208 |