Emigration of Age-1 Arctic Charr, Salvelinus alpinus , into a Brackish Lagoon

Synopsis We caught first time emigrating Arctic charr in a smolt trap in the Vesturdalsa River in NE-Iceland. Most of the charr were of age-1 or age-2, but older pre-emigrating charr had passed earlier. In all years age-1 charr were more numerous than age-2 charr. The characteristics of the run differ considerably among years, with respect to onset, duration and pattern. The onset was correlated to water temperature. Most of the charr entered the trap during night.