UV treatment in RAS influences the rearing water microbiota and reduces the survival of European lobster larvae (Homarus gammarus)
The rearing environment is important for a stable production of good quality lobster juveniles. By providing an environment excluding pathogens and dominated by mutualistic bacteria, the probability of developing healthy host-microbe relationships and produce healthy juveniles is increased. Disinfec...
Published in: | Aquacultural Engineering |
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Online Access: | https://hdl.handle.net/11250/3018937 https://doi.org/10.1016/j.aquaeng.2021.102176 |
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ftsintef:oai:sintef.brage.unit.no:11250/3018937 2023-05-15T16:08:46+02:00 UV treatment in RAS influences the rearing water microbiota and reduces the survival of European lobster larvae (Homarus gammarus) Attramadal, Kari J.K. Øien, John Vegard Kristensen, Elisabeth Evjemo, Jan Ove Kjørsvik, Elin Vadstein, Olav Bakke, Ingrid 2021 application/pdf https://hdl.handle.net/11250/3018937 https://doi.org/10.1016/j.aquaeng.2021.102176 eng eng Elsevier Aquacultural Engineering. 2021, 94 1-9. urn:issn:0144-8609 https://hdl.handle.net/11250/3018937 https://doi.org/10.1016/j.aquaeng.2021.102176 cristin:1921767 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2021 The Authors. Published by Elsevier B.V CC-BY 1-9 94 Aquacultural Engineering 102176 K-selection Homarus gammarus European lobster Management Water treatment Water quality Microbial maturation Bacteria Marine larvae UV Disinfection Recirculation RAS Microbial control Peer reviewed Journal article 2021 ftsintef https://doi.org/10.1016/j.aquaeng.2021.102176 2022-09-21T22:42:40Z The rearing environment is important for a stable production of good quality lobster juveniles. By providing an environment excluding pathogens and dominated by mutualistic bacteria, the probability of developing healthy host-microbe relationships and produce healthy juveniles is increased. Disinfection of water and sudden increase in the supply of organic matter in culture tanks are processes that open for uncontrolled microbial regrowth in the rearing water. This increase the variability in the development of the microbiota between replicate rearing tanks and promotes selection for potentially harmful opportunistic bacteria. In two start feeding experiments with European lobster (Homarus gammarus) we compared the bacterial environment in three types of rearing systems: a recirculating aquaculture system (RAS) with UV treatment directly in front of the rearing raceways, a RAS without disinfection, and a conventional flow through system (FTS). The RAS with no disinfection was hypothesised to stabilise the microbiota of the rearing water, select against opportunistic bacteria, and reduce variability in production outcome between replicate tanks compared to the other systems. As predicted, the three different systems developed significantly different compositions of the microbiota in the rearing water and the larvae. On average, the survival of larvae in RAS without disinfection increased with 43 and 275 %, in the first experiment, and 64 and 18 % in the second experiment, compared to RAS with UV and FTS, respectively. Also, the RAS without disinfection showed less variability in the survival of larvae between replicate tanks and batches compared to the other treatments. The results are promising for controlling the microbiota of the rearing water to improve, increase and stabilise the production of marine larvae by competent use of water treatment and selection regimes. Based on the presented and previous work, RAS is recommended over FTS, and in RAS it is recommended to avoid point-disinfection of the ... Article in Journal/Newspaper European lobster Homarus gammarus SINTEF Open (Brage) Aquacultural Engineering 94 102176 |
institution |
Open Polar |
collection |
SINTEF Open (Brage) |
op_collection_id |
ftsintef |
language |
English |
topic |
K-selection Homarus gammarus European lobster Management Water treatment Water quality Microbial maturation Bacteria Marine larvae UV Disinfection Recirculation RAS Microbial control |
spellingShingle |
K-selection Homarus gammarus European lobster Management Water treatment Water quality Microbial maturation Bacteria Marine larvae UV Disinfection Recirculation RAS Microbial control Attramadal, Kari J.K. Øien, John Vegard Kristensen, Elisabeth Evjemo, Jan Ove Kjørsvik, Elin Vadstein, Olav Bakke, Ingrid UV treatment in RAS influences the rearing water microbiota and reduces the survival of European lobster larvae (Homarus gammarus) |
topic_facet |
K-selection Homarus gammarus European lobster Management Water treatment Water quality Microbial maturation Bacteria Marine larvae UV Disinfection Recirculation RAS Microbial control |
description |
The rearing environment is important for a stable production of good quality lobster juveniles. By providing an environment excluding pathogens and dominated by mutualistic bacteria, the probability of developing healthy host-microbe relationships and produce healthy juveniles is increased. Disinfection of water and sudden increase in the supply of organic matter in culture tanks are processes that open for uncontrolled microbial regrowth in the rearing water. This increase the variability in the development of the microbiota between replicate rearing tanks and promotes selection for potentially harmful opportunistic bacteria. In two start feeding experiments with European lobster (Homarus gammarus) we compared the bacterial environment in three types of rearing systems: a recirculating aquaculture system (RAS) with UV treatment directly in front of the rearing raceways, a RAS without disinfection, and a conventional flow through system (FTS). The RAS with no disinfection was hypothesised to stabilise the microbiota of the rearing water, select against opportunistic bacteria, and reduce variability in production outcome between replicate tanks compared to the other systems. As predicted, the three different systems developed significantly different compositions of the microbiota in the rearing water and the larvae. On average, the survival of larvae in RAS without disinfection increased with 43 and 275 %, in the first experiment, and 64 and 18 % in the second experiment, compared to RAS with UV and FTS, respectively. Also, the RAS without disinfection showed less variability in the survival of larvae between replicate tanks and batches compared to the other treatments. The results are promising for controlling the microbiota of the rearing water to improve, increase and stabilise the production of marine larvae by competent use of water treatment and selection regimes. Based on the presented and previous work, RAS is recommended over FTS, and in RAS it is recommended to avoid point-disinfection of the ... |
format |
Article in Journal/Newspaper |
author |
Attramadal, Kari J.K. Øien, John Vegard Kristensen, Elisabeth Evjemo, Jan Ove Kjørsvik, Elin Vadstein, Olav Bakke, Ingrid |
author_facet |
Attramadal, Kari J.K. Øien, John Vegard Kristensen, Elisabeth Evjemo, Jan Ove Kjørsvik, Elin Vadstein, Olav Bakke, Ingrid |
author_sort |
Attramadal, Kari J.K. |
title |
UV treatment in RAS influences the rearing water microbiota and reduces the survival of European lobster larvae (Homarus gammarus) |
title_short |
UV treatment in RAS influences the rearing water microbiota and reduces the survival of European lobster larvae (Homarus gammarus) |
title_full |
UV treatment in RAS influences the rearing water microbiota and reduces the survival of European lobster larvae (Homarus gammarus) |
title_fullStr |
UV treatment in RAS influences the rearing water microbiota and reduces the survival of European lobster larvae (Homarus gammarus) |
title_full_unstemmed |
UV treatment in RAS influences the rearing water microbiota and reduces the survival of European lobster larvae (Homarus gammarus) |
title_sort |
uv treatment in ras influences the rearing water microbiota and reduces the survival of european lobster larvae (homarus gammarus) |
publisher |
Elsevier |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/3018937 https://doi.org/10.1016/j.aquaeng.2021.102176 |
genre |
European lobster Homarus gammarus |
genre_facet |
European lobster Homarus gammarus |
op_source |
1-9 94 Aquacultural Engineering 102176 |
op_relation |
Aquacultural Engineering. 2021, 94 1-9. urn:issn:0144-8609 https://hdl.handle.net/11250/3018937 https://doi.org/10.1016/j.aquaeng.2021.102176 cristin:1921767 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2021 The Authors. Published by Elsevier B.V |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.aquaeng.2021.102176 |
container_title |
Aquacultural Engineering |
container_volume |
94 |
container_start_page |
102176 |
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1766404784222371840 |