Kennedy, RichardEvans, Derek W.Allen, Michelle M.2020-08-262020-08-262020-08-26Kennedy, R.J., Evans, D. and Allen, M. (2020) ‘Long‐term retention of dummy acoustic transmitters in adult brown trout’, Journal of Fish Biology. Wiley. doi:10.1111/jfb.144980022-1112https://doi.org/10.1111/jfb.14498Publication history: Accepted - 12 August 2020; Published online - 13 October 2020.A group of 36 1+ age class Salmo trutta were surgically implanted with dummy acoustic tags and monitored for 370 days. In total 13 tags were expelled through-out the experiment with an overall tag loss rate of c. 0.035 tag/d. Fish length was the only explanatory variable which had a significant association with subsequent tag expulsion. The estimated probability of retaining a tag for a year for a fish of length 32 cm was 0.76, 34 cm was 0.60 and 36 cm was 0.38. The long term tag loss patterns were examined and discussed.enCopyright 2020 Fisheries Society of the British Isles . This work is made available online in accordance with the publisher’s policies. Please refer to any applicable terms of use of the publisher.Salmonids, Telemetry, Tag loss, UltrasoundArticle