Evaluating the effect of dorsal muscle biopsies on adult Atlantic salmon growth and marine return rates

Conservation Physiology
Kristin BøeMichael Power

Abstract

Increasing conservation and animal-welfare concerns have driven the development of non-lethal sampling of fish populations, with the use of muscle tissue biopsies now being routinely applied as a sampling method in the wild. Crucial to the success of non-lethal sampling, however, is an evaluation of the short- and long-term consequences of the treatment and ultimately the determination of how these may affect organism mortality and other fitness-related traits. The current study evaluated the use of a dorsal muscle biopsies on post-spawned Atlantic salmon emigrating to sea and undertaking a 2-month long-feeding migration before returning to spawn. Using mark-recapture, return rates and growth were compared between fish that were biopsied and externally tagged, and a control group tagged only with external tags. The biopsy treatment showed no lasting effects on fish as estimated from the two key fitness-related parameters. Results, therefore, suggest the technique can be more widely applied to gather information on marine migrating Atlantic salmon and other anadromous fishes that can be intercepted as they descend and ascend rivers during seasonal migrations. Coupled with modern tagging technologies, the use of biopsies may faci...Continue Reading

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Citations

May 28, 2021·Biological Reviews of the Cambridge Philosophical Society·Kim Birnie-GauvinKim Aarestrup

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Methods Mentioned

BETA
biopsies
biopsy

Software Mentioned

R
SIA

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