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dc.contributor.authorThorarensen, Helgi
dc.contributor.authorImsland, Albert
dc.contributor.authorMonroe, Amber Christina
dc.date.accessioned2023-09-08T11:02:44Z
dc.date.available2023-09-08T11:02:44Z
dc.date.issued2023-08-12
dc.description.abstractThe objective of this study was to examine the effects of CO<sub>2</sub>, total ammonia nitrogen (TAN: nitrogen bound as either NH<sub>3</sub> or NH<sub>4</sub><sup>+</sup>) and pH on the growth and survival of juvenile lumpfish in a two-month growth study. The results demonstrate the complex interactions of these water quality variables. The specific growth rate (SGR) of the lumpfish was progressively reduced with increasing [CO<sub>2</sub>] concentration above 5–10 mg·L<sup>−1</sup>. However, growth may be reduced at even lower [CO<sub>2</sub>] and the results provide no clear safe limits under which the growth of lumpfish is unaffected by CO<sub>2</sub> concentration. At the lowest [CO<sub>2</sub>] tested (8 mg·L<sup>−1</sup>) the SGR was reduced compared with controls. Moreover, in treatments where the [CO<sub>2</sub>] concentration increased to 8 mg·L<sup>−1</sup> as pH was artificially reduced, the SGR was similarly reduced. These results indicate that lumpfish juveniles are very sensitive to increased [CO<sub>2</sub>] concentration in water. The SGR of the lumpfish was progressively reduced as the NH<sub>4</sub><sup>+</sup> concentration increased while maintaining the [NH<sub>3</sub>] constant (70–80 μg·<sup>l−1</sup>). However, in these treatments the [CO<sub>2</sub>] also increased to 8–10 mg·L<sup>−1</sup> due to changes in pH and this likely contributed to reduced growth. Moreover, due to nitrification in the rearing systems, the nitrite concentration also increased to critical levels (1.5–4.2 mg·L<sup>−1</sup>) that could affect growth. Therefore, the results do not provide clear evidence for effects of increased NH<sub>4</sub><sup>+</sup> on the growth of lumpfish. Taken together, the results of the experiments show that lumpfish are sensitive to perturbations in water quality and provide a benchmark for operational welfare indicators in lumpfish aquaculture.en_US
dc.identifier.citationThorarensen, Imsland, Monroe. The effect of CO<inf>2</inf>, total ammonia nitrogen and pH on growth of juvenile lumpfish (Cyclopterus lumpus). Aquaculture. 2023;577en_US
dc.identifier.cristinIDFRIDAID 2172159
dc.identifier.doi10.1016/j.aquaculture.2023.739986
dc.identifier.issn0044-8486
dc.identifier.issn1873-5622
dc.identifier.urihttps://hdl.handle.net/10037/30834
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.journalAquaculture
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2023 The Author(s)en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.rightsAttribution 4.0 International (CC BY 4.0)en_US
dc.titleThe effect of CO2, total ammonia nitrogen and pH on growth of juvenile lumpfish (Cyclopterus lumpus)en_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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Attribution 4.0 International (CC BY 4.0)
Med mindre det står noe annet, er denne innførselens lisens beskrevet som Attribution 4.0 International (CC BY 4.0)