Repository logo
 

Continuous light (relative to a 12:12 photoperiod) has no effect on anxiety-like behaviour, boldness, and locomotion in coho salmon (Oncorhynchus kisutch) post-smolts in recirculating aquaculture systems at a salinity of either 2.5 or 10 ppt

dc.contributor.authorHamilton, Trevor
dc.contributor.authorSzaszkiewicz, Joshua
dc.contributor.authorKrook, Jeffrey T.
dc.contributor.authorRichards, Jeffrey G.
dc.contributor.authorStiller, Kevin
dc.contributor.authorBrauner, Colin J.
dc.date.accessioned2023-06-15T20:14:55Z
dc.date.available2023-06-15T20:14:55Z
dc.date.issued2022
dc.description.abstractThere is increased interest in rearing salmon in Recirculating Aquaculture Systems (RAS), where environmental conditions can be tightly controlled to optimize growth. Photoperiod and salinity are two important parameters that can be manipulated in RAS. A longer photoperiod permits more time for feeding, while intermediate salinities may reduce the energetic costs of ionoregulation, both of which may enhance growth. However, little is known about how rearing at different photoperiods and salinity affect behaviour, an understudied but important research topic for intensive fish rearing. To address this, we examined the behavioural effects of two salinities and two photoperiod regimes in coho salmon (Oncorhynchus kisutch) post-smolts reared continuously for 120 days in a RAS. Fish were reared on a photoperiod of either 12 h light:12 h dark (12:12), or 24 h light (24:0) at salinities of 2.5 and 10 ppt. To investigate behavioural differences associated with these treatments, we quantified: i) movement in an open-field test, ii) exploratory behaviour/boldness using a novel object approach test, and iii) anxiety-like behaviour with a light/dark test. The 24:0 groups displayed no differences in boldness/anxiety-like behaviour and locomotion relative to the 12:12 groups at their respective salinities. Taken together, fish reared under continuous light (24:0) show negligible behavioural alterations compared to fish reared under normal light dark conditions (12:12).
dc.description.urihttps://library.macewan.ca/cgi-bin/SFX/url.pl/E2S
dc.identifier.citationHamilton, T. J., Szaszkiewicz, J., Krook, J., Richards, J. G., Stiller, K., & Brauner, C. J. (2022). Continuous light (relative to a 12:12 photoperiod) has no effect on anxiety-like behaviour, boldness, and locomotion in coho salmon (Oncorhynchus kisutch) post-smolts in recirculating aquaculture systems at a salinity of either 2.5 or 10 ppt. Comparative Biochemistry & Physiology Part A: Molecular & Integrative Physiology, 263, N.PAG. https://doi.org/10.1016/j.cbpa.2021.111070
dc.identifier.doihttps://doi.org/10.1016/j.cbpa.2021.111070
dc.identifier.urihttps://hdl.handle.net/20.500.14078/3138
dc.language.isoen
dc.rightsAll Rights Reserved
dc.subjectanxiety
dc.subjectbehaviour
dc.subjectboldness
dc.subjectcoho salmon
dc.subjectphotoperiod
dc.subjectrecirculating aquaculture systems
dc.subjectsalinity
dc.titleContinuous light (relative to a 12:12 photoperiod) has no effect on anxiety-like behaviour, boldness, and locomotion in coho salmon (Oncorhynchus kisutch) post-smolts in recirculating aquaculture systems at a salinity of either 2.5 or 10 ppten
dc.typeArticle

Files