Inorganic nitrogen addition in a semi-intensive turbot larval aquaculture system:effects on phytoplankton and zooplankton composition
A nitrogen manipulation experiment was conducted in a semi-intensive outdoor system where turbot larvae feed on copepods. Nitrogen addition is hypothesized to stimulate a cascade reaction increasing phytoplankton biomass, copepods’ productivity and larval fish survival. Triplicates were established...
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2016
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Online Access: | https://forskning.ruc.dk/da/publications/f2ccfc5b-7d03-44c6-bf50-41f7b3b0d358 https://doi.org/10.1111/are.12842 https://hdl.handle.net/1800/f2ccfc5b-7d03-44c6-bf50-41f7b3b0d358 |
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fturoskildefispu:oai:pure.atira.dk:publications/f2ccfc5b-7d03-44c6-bf50-41f7b3b0d358 2023-12-10T09:54:26+01:00 Inorganic nitrogen addition in a semi-intensive turbot larval aquaculture system:effects on phytoplankton and zooplankton composition Blanda, Elisa Hansen, Benni Winding Højgaard, Jacob Kring Jepsen, Per Meyer Pedersen, Morten Foldager Rayner, Thomas Allan Thoisen, Christina Vinum Jacobsen, Hans Henrik 2016-12 https://forskning.ruc.dk/da/publications/f2ccfc5b-7d03-44c6-bf50-41f7b3b0d358 https://doi.org/10.1111/are.12842 https://hdl.handle.net/1800/f2ccfc5b-7d03-44c6-bf50-41f7b3b0d358 eng eng info:eu-repo/semantics/closedAccess Blanda , E , Hansen , B W , Højgaard , J K , Jepsen , P M , Pedersen , M F , Rayner , T A , Thoisen , C V & Jacobsen , H H 2016 , ' Inorganic nitrogen addition in a semi-intensive turbot larval aquaculture system : effects on phytoplankton and zooplankton composition ' , Aquaculture Research , vol. 47 , no. 12 , pp. 3913-3933 . https://doi.org/10.1111/are.12842 copepods as live feed inorganic nitrogen phytoplankton turbot larvae survival article 2016 fturoskildefispu https://doi.org/10.1111/are.12842 2023-11-15T23:55:46Z A nitrogen manipulation experiment was conducted in a semi-intensive outdoor system where turbot larvae feed on copepods. Nitrogen addition is hypothesized to stimulate a cascade reaction increasing phytoplankton biomass, copepods’ productivity and larval fish survival. Triplicates were established for three treatments: a control with no additional nitrogen, a pulsed dose where nitrogen was added in three doses over time and a full dose where all nitrogen, equal to the total of the pulse dose treatment, was added initially. In the control, chlorophyll a averaged 3.3 ± 1.5 μg L−1 and phytoplankton was dominated by diatoms, while the pulsed and full dose treatments showed chlorophyll a at 28.6 ± 9.9 and 47.7 ± 10.0 μg L−1, respectively, with dinoflagellates as the main phytoplankton group. Due to photosynthesis, pH increased >9 in both the nitrogen treatments compared to the control (8.5). Potential toxic dinoflagellates, including Alexandrium pseudogonyaulax and Prorocentrum spp., became dominant in the nitrogen treatments and might have arrested zooplankton recruitment. Laboratory experiments with a toxic strain of A. pseudogonyaulax proved that Acartia tonsa reproduction and naupliar survival were affected negatively at realistic fish tank concentrations of 100 and 20 cells mL−1, respectively. Compared to the control, pulsed and full dose treatments reached higher copepod biomass and showed a shift over time in species composition from Centropages hamatus to Acartia spp. However, high pH levels and dinoflagellate blooms had a negative effect on larval fish survival, suggesting management improvements on water quality and separation between copepods and fish production tanks. Article in Journal/Newspaper Turbot Copepods Roskilde University Research Portal (RUC) Aquaculture Research 47 12 3913 3933 |
institution |
Open Polar |
collection |
Roskilde University Research Portal (RUC) |
op_collection_id |
fturoskildefispu |
language |
English |
topic |
copepods as live feed inorganic nitrogen phytoplankton turbot larvae survival |
spellingShingle |
copepods as live feed inorganic nitrogen phytoplankton turbot larvae survival Blanda, Elisa Hansen, Benni Winding Højgaard, Jacob Kring Jepsen, Per Meyer Pedersen, Morten Foldager Rayner, Thomas Allan Thoisen, Christina Vinum Jacobsen, Hans Henrik Inorganic nitrogen addition in a semi-intensive turbot larval aquaculture system:effects on phytoplankton and zooplankton composition |
topic_facet |
copepods as live feed inorganic nitrogen phytoplankton turbot larvae survival |
description |
A nitrogen manipulation experiment was conducted in a semi-intensive outdoor system where turbot larvae feed on copepods. Nitrogen addition is hypothesized to stimulate a cascade reaction increasing phytoplankton biomass, copepods’ productivity and larval fish survival. Triplicates were established for three treatments: a control with no additional nitrogen, a pulsed dose where nitrogen was added in three doses over time and a full dose where all nitrogen, equal to the total of the pulse dose treatment, was added initially. In the control, chlorophyll a averaged 3.3 ± 1.5 μg L−1 and phytoplankton was dominated by diatoms, while the pulsed and full dose treatments showed chlorophyll a at 28.6 ± 9.9 and 47.7 ± 10.0 μg L−1, respectively, with dinoflagellates as the main phytoplankton group. Due to photosynthesis, pH increased >9 in both the nitrogen treatments compared to the control (8.5). Potential toxic dinoflagellates, including Alexandrium pseudogonyaulax and Prorocentrum spp., became dominant in the nitrogen treatments and might have arrested zooplankton recruitment. Laboratory experiments with a toxic strain of A. pseudogonyaulax proved that Acartia tonsa reproduction and naupliar survival were affected negatively at realistic fish tank concentrations of 100 and 20 cells mL−1, respectively. Compared to the control, pulsed and full dose treatments reached higher copepod biomass and showed a shift over time in species composition from Centropages hamatus to Acartia spp. However, high pH levels and dinoflagellate blooms had a negative effect on larval fish survival, suggesting management improvements on water quality and separation between copepods and fish production tanks. |
format |
Article in Journal/Newspaper |
author |
Blanda, Elisa Hansen, Benni Winding Højgaard, Jacob Kring Jepsen, Per Meyer Pedersen, Morten Foldager Rayner, Thomas Allan Thoisen, Christina Vinum Jacobsen, Hans Henrik |
author_facet |
Blanda, Elisa Hansen, Benni Winding Højgaard, Jacob Kring Jepsen, Per Meyer Pedersen, Morten Foldager Rayner, Thomas Allan Thoisen, Christina Vinum Jacobsen, Hans Henrik |
author_sort |
Blanda, Elisa |
title |
Inorganic nitrogen addition in a semi-intensive turbot larval aquaculture system:effects on phytoplankton and zooplankton composition |
title_short |
Inorganic nitrogen addition in a semi-intensive turbot larval aquaculture system:effects on phytoplankton and zooplankton composition |
title_full |
Inorganic nitrogen addition in a semi-intensive turbot larval aquaculture system:effects on phytoplankton and zooplankton composition |
title_fullStr |
Inorganic nitrogen addition in a semi-intensive turbot larval aquaculture system:effects on phytoplankton and zooplankton composition |
title_full_unstemmed |
Inorganic nitrogen addition in a semi-intensive turbot larval aquaculture system:effects on phytoplankton and zooplankton composition |
title_sort |
inorganic nitrogen addition in a semi-intensive turbot larval aquaculture system:effects on phytoplankton and zooplankton composition |
publishDate |
2016 |
url |
https://forskning.ruc.dk/da/publications/f2ccfc5b-7d03-44c6-bf50-41f7b3b0d358 https://doi.org/10.1111/are.12842 https://hdl.handle.net/1800/f2ccfc5b-7d03-44c6-bf50-41f7b3b0d358 |
genre |
Turbot Copepods |
genre_facet |
Turbot Copepods |
op_source |
Blanda , E , Hansen , B W , Højgaard , J K , Jepsen , P M , Pedersen , M F , Rayner , T A , Thoisen , C V & Jacobsen , H H 2016 , ' Inorganic nitrogen addition in a semi-intensive turbot larval aquaculture system : effects on phytoplankton and zooplankton composition ' , Aquaculture Research , vol. 47 , no. 12 , pp. 3913-3933 . https://doi.org/10.1111/are.12842 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1111/are.12842 |
container_title |
Aquaculture Research |
container_volume |
47 |
container_issue |
12 |
container_start_page |
3913 |
op_container_end_page |
3933 |
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1784901861101273088 |