The course of migrations of smolts of the brown trout (Salmo trutta m. trutta L.) grown in the rivers of Pomerania

Abstract

In the present report the daily seaward migrations of the brown trout (Salmo trutta m. trutta L.) smolts, grown in natu ral conditions in Pomeranian rivers: the Molstowa, surveyed for one season, the Gowienica-for five seasons, and the Os6w ka-for two seasons, were analyzed. The intensity of the .mi grations was related to the water temperatures and the moon phases. The above studies were based on a total of 5593 acqu ired smolts.