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Effects of individual variation in length, condition and run‐time on return rates of wild‐reared Atlantic salmon Salmo salar smolts

Effects of individual variation in length, condition and run‐time on return rates of wild‐reared... Groups of wild‐reared Atlantic salmon Salmo salar smolts were captured during their seaward migration on a tributary of the River Conon, Scotland, U.K., from 1999 to 2014 and tagged with passive integrated transponders (PIT). Fish that subsequently returned to the river after growing at sea were recorded automatically by a PIT‐detector in a fish pass. Return rate was related directly to length and condition and inversely to day of the year that the smolt was tagged. Over years, as the study progressed, there was a significant increase in the proportion of smolts returning after two or more years at sea and no trend in returns of salmon having spent one winter at sea. There was no trend in the date of return of salmon across the study period. Fish that had spent more winters at sea returned earlier in the year. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Fish Biology Wiley

Effects of individual variation in length, condition and run‐time on return rates of wild‐reared Atlantic salmon Salmo salar smolts

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References (24)

Publisher
Wiley
Copyright
Journal of Fish Biology © 2018 The Fisheries Society of the British Isles
ISSN
0022-1112
eISSN
1095-8649
DOI
10.1111/jfb.13548
pmid
29537092
Publisher site
See Article on Publisher Site

Abstract

Groups of wild‐reared Atlantic salmon Salmo salar smolts were captured during their seaward migration on a tributary of the River Conon, Scotland, U.K., from 1999 to 2014 and tagged with passive integrated transponders (PIT). Fish that subsequently returned to the river after growing at sea were recorded automatically by a PIT‐detector in a fish pass. Return rate was related directly to length and condition and inversely to day of the year that the smolt was tagged. Over years, as the study progressed, there was a significant increase in the proportion of smolts returning after two or more years at sea and no trend in returns of salmon having spent one winter at sea. There was no trend in the date of return of salmon across the study period. Fish that had spent more winters at sea returned earlier in the year.

Journal

Journal of Fish Biology – Wiley

Published: Jan 1, 2018

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