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. and Bean, C. W. (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), pp. 1635-1644. (doi:10.1111/jfb.13596) (PMID:29537067)

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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.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Adams, Professor Colin and Thomas, Dr Rhian and Bean, Professor Colin
Authors: Brackley, R., Lucas, M. C., Thomas, R., Adams, C. E., and Bean, C. W.
College/School:College of Medical Veterinary and Life Sciences > Institute of Biodiversity Animal Health and Comparative Medicine
College of Science and Engineering > School of Geographical and Earth Sciences
Journal Name:Journal of Fish Biology
Publisher:Wiley
ISSN:0022-1112
ISSN (Online):1095-8649
Published Online:14 March 2018
Copyright Holders:Copyright © 2018 The Fisheries Society of the British Isles
First Published:First published in Journal of Fish Biology 92(5): 1635-1644
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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