The influence of aquaculture unit proximity on the pattern of Lepeophtheirus salmonis infection of anadromous Salmo trutta populations on the Isle of Skye, Scotland

Moore, I., Dodd, J.A., Newton, M., Bean, C.W. , Lindsay, I., Jarosz, P. and Adams, C.E. (2018) The influence of aquaculture unit proximity on the pattern of Lepeophtheirus salmonis infection of anadromous Salmo trutta populations on the Isle of Skye, Scotland. Journal of Fish Biology, 92(6), pp. 1849-1865. (doi:10.1111/jfb.13625) (PMID:29603222)

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Abstract

A total of 230 anadromous Salmo trutta (brown trout) were sampled in five sheltered coastal fjords (or sea lochs) on the Isle of Skye, Scotland, U.K., in 2016 at varying distances from active Atlantic salmon Salmo salar farms. Statistical models were developed to investigate potential correlations between salmon lice Lepeophtheirus salmonis burdens on S. trutta hosts and their proximity to S. salar farm cages. Significant correlations were found between lice burdens and fish fork length and proximity to the nearest S. salar farm. The probability of the presence of L. salmonis on fish hosts increased with fish host size and with distance from the nearest S. salar farm, but total lice burdens were highest in fish sampled near S. salar farms and decreased with distance. The proportion of different life‐cycle stages of L. salmonis were also dependent on S. salar farm proximity, with higher juvenile lice numbers recorded at sites near S. salar farm cages. These results highlight the complexity of the relationship between S. trutta and L. salmonis infections on wild fish and emphasise the requirement of further research to quantify these effects to better inform conservation and management strategies, particularly in areas of active S. salar farm facilities.

Item Type:Articles
Additional Information:This project was part funded by Grieg Seafood Ltd.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Moore, Isabel and Dodd, Dr Jennifer and Adams, Professor Colin and Bean, Professor Colin and Newton, Dr Matthew
Authors: Moore, I., Dodd, J.A., Newton, M., Bean, C.W., Lindsay, I., Jarosz, P., and Adams, C.E.
College/School:College of Medical Veterinary and Life Sciences > Institute of Biodiversity Animal Health and Comparative Medicine
Journal Name:Journal of Fish Biology
Publisher:Wiley
ISSN:0022-1112
ISSN (Online):1095-8649
Published Online:30 March 2018
Copyright Holders:Copyright © 2018 The Fisheries Society of the British Isles
First Published:First published in Journal of Fish Biology 92(6): 1849-1865
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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