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Case definitions for skin lesion syndromes in chinook salmon farmed in Marlborough Sounds, New Zealand

Johnston, H, Symonds, J, Walker, S, Preece, M, Lopez, C and Nowak, B ORCID: 0000-0002-0347-643X 2021 , 'Case definitions for skin lesion syndromes in chinook salmon farmed in Marlborough Sounds, New Zealand' , Journal of Fish Diseases, vol. 44, no. 2 , pp. 141-147 , doi: 10.1111/jfd.13317.

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Skin lesions are commonly reported in farmed salmonids. Chinook salmon (Oncorhynchus tshawytscha), introduced from California USA, is the only salmonid species commercially farmed in New Zealand, although trout are cultured for release by Fish and Game New Zealand. There are several farming areas in New Zealand, including Marlborough Sounds, Canterbury and Stewart Island. While the industry has not been affected by any of the major production diseases seen internationally, skin lesions have been recorded with an increase in prevalence from 2012 onwards in the Marlborough Sounds and were associated with elevated summer mortalities on farms in 2015. Here we are proposing case definitions for different types of skin lesions for future monitoring and research. Based on our current understanding of the above skin conditions, we developed case definitions for spots, spreading spots, ulcerated spreading spots and Regular Outline Flank Ulcers defining a positive case for three study units, including individual fish, pen/unit and farm.

Item Type: Article
Authors/Creators:Johnston, H and Symonds, J and Walker, S and Preece, M and Lopez, C and Nowak, B
Keywords: aquaculture, regular outline flank ulcer, spot syndrome
Journal or Publication Title: Journal of Fish Diseases
Publisher: Blackwell Publishing Ltd
ISSN: 0140-7775
DOI / ID Number: 10.1111/jfd.13317
Copyright Information:

Copyright 2020 John Wiley & Sons Ltd

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