The data archived here were used to examine the effects of salmon lice on the return rate, time at sea and marine growth of sea trout migrating from the river Shieldaig in Scotland. The data were collected between 1999 and 2020 and consist of a) fish captures in a trap at the mouth of the river Shieldaig with associated length and weight measurements; and b) fish captures by electrofishing in the area below the trap with associated salmon lice counts.

The data are the basis of the paper:
A 20-year study examining the effects of salmon lice on the return rate, time at sea, and marine growth of sea trout migrating from the river Shieldaig in Scotland. D J Morris, R J Fryer, J A Raffell, S J Middlemas, J D Godfrey, J D Armstrong. ICES Journal of Marine Science, Volume 83, Issue 1, fsag001 https://doi.org/10.1093/icesjms/fsag001.