Otolith mineralogy affects otolith shape asymmetry: A comparison of hatchery and natural origin Coho salmon (Oncorhynchus kisutch)

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dc.contributor.authorQuindazzi, Micah
dc.contributor.authorGaffney, Leigh P.
dc.contributor.authorPolard, Emma
dc.contributor.authorBohlender, Nick
dc.contributor.authorDuguid, Will
dc.contributor.authorJuanes, Francis
dc.date.accessioned2024-03-22T17:43:42Z
dc.date.available2024-03-22T17:43:42Z
dc.date.issued2023
dc.description.abstractMany aspects of natural and hatchery origin salmonid genetics, physiology, behaviour, anatomy and life histories have been compared due to the concerns about what effects domestication and hatchery rearing conditions have on fitness. Genetic and environmental stressors associated with hatchery rearing could cause greater developmental instability (DI), and therefore a higher degree of fluctuating asymmetry (FA) in various bilaterally paired characters, such as otoliths. Nonetheless, to appropriately infer the effects of DI on otolith asymmetry, otolith mineralogy must be accounted for. Vateritic otoliths differ substantially from aragonitic otoliths in terms of mass and shape and can artificially inflate any measurement of FA if not properly accounted for. In this study, measurements of otolith asymmetry between hatchery and natural origin Coho salmon Oncorhynchus kisutch from three different river systems were compared to assess the overall differences in asymmetry when the calcium carbonate polymorph accounted for 59.3% of otoliths from hatchery origin O. kisutch was vateritic compared to 11.7% of otoliths from natural origin O. kisutch. Otolith mineralogy, rather than origin, was the most significant factor influencing the differences in asymmetry for each shape metric. When only aragonitic otoliths were compared, there was no difference in absolute asymmetry between hatchery and natural origin O. kisutch. The authors recommend other researchers to assess otolith mineralogy when conducting studies regarding otolith morphometrics and otolith FA.
dc.description.reviewstatusReviewed
dc.description.scholarlevelFaculty
dc.description.sponsorshipWe thank the Pacific Salmon Foundation for their continued support on our work on salmonids. Additional funding was provided by Mitacs, NSERC, the Liber Ero Foundation and the University of Victoria.
dc.identifier.citationQuindazzi, M. J., Gaffney, L., Polard, E., Bohlender, N., Duguid, W., & Juanes, F. (2023). Otolith mineralogy affects otolith shape asymmetry: A comparison of hatchery and natural origin Coho salmon (Oncorhynchus kisutch). Journal of Fish Biology, 102(4), 870–882. https://doi.org/10.1111/jfb.15329
dc.identifier.urihttps://doi.org/10.1111/jfb.15329
dc.identifier.urihttps://hdl.handle.net/1828/16279
dc.language.isoen
dc.publisherJournal of Fish Biology
dc.rightsAttribution-NonCommercial 4.0 Internationalen
dc.subjectasymmetry
dc.subjectCoho salmon (Oncorhynchus kisutch)
dc.subjecthatcheries
dc.subjectmineralogy
dc.subjectmorphometrics
dc.subjectotoliths
dc.subjectsalmonid enhancement
dc.subjectvaterite
dc.subject.departmentDepartment of Biology
dc.titleOtolith mineralogy affects otolith shape asymmetry: A comparison of hatchery and natural origin Coho salmon (Oncorhynchus kisutch)
dc.typeArticle

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