Comparison of damage to live v. euthanized Atlantic salmon Salmo salar smolts from passage through an Archimedean screw turbine

Brackley, R.; Lucas, M.C.; Thomas, R.; Adams, C.E.; Bean, C.W.

Abstract

This study assessed the usefulness of passing euthanized Atlantic salmon Salmo salar smolts through an Archimedean screw turbine to test for external damage, as compared with live, actively swimming smolts. Scale loss was the only observed effect. Severe scale loss was 5·9 times more prevalent in euthanized turbine‐passed fish (45%) than the live fish (7·6%). Additionally, distinctive patterns of scale loss, consistent with grinding between the turbine helices and housing trough, were observed in 35% of euthanized turbine‐passed smolts. This distinctive pattern of scale loss was not seen in live turbine‐passed smolts, nor in control groups (live and euthanized smolts released downstream of the turbine), which suggests that the altered behaviour of dead fish in turbine flows generates biased injury outcomes.

Citation

Brackley, R., Lucas, M., Thomas, R., Adams, C., & Bean, C. (2018). Comparison of damage to live v. euthanized Atlantic salmon Salmo salar smolts from passage through an Archimedean screw turbine. Journal of Fish Biology, 92(5), 1635-1644. https://doi.org/10.1111/jfb.13596

• Journal Article Type: Article
• Acceptance Date: Feb 15, 2018
• Online Publication Date: Mar 14, 2018
• Publication Date: May 1, 2018
• Deposit Date: Mar 10, 2018
• Publicly Available Date: Mar 14, 2019
• Journal: Journal of Fish Biology
• Print ISSN: 0022-1112
• Electronic ISSN: 1095-8649
• Publisher: Wiley
• Peer Reviewed: Peer Reviewed
• Volume: 92
• Issue: 5
• Pages: 1635-1644
• DOI: https://doi.org/10.1111/jfb.13596
• Public URL: https://durham-repository.worktribe.com/output/1337733