Quantifying an overlooked aspect of partial migration using otolith microchemistry

2020/09/03 by Mehis Rohtla, Lagle Matetski, Imre Taal +4 · 3 citations
Environmental Science · Agricultural and Biological Sciences · #Fish Ecology and Management Studies #Marine and fisheries research #Fish Biology and Ecology Studies

paper · doi:10.1111/jfb.14522

Abstract

For the first time, an overlooked aspect of partial migration was quantified using otolith microchemistry and brown trout, Salmo trutta, as a model species. Relative contributions of freshwater resident and anadromous female brown trout to mixed-stock sea trout populations in the Baltic Sea were estimated. Out of 236 confirmed wild sea trout sampled around the coast of Estonia 88% were of anadromous maternal origin and 12% were of resident maternal origin. This novel finding underscores the importance of the resident contingent in maintaining the persistence and resilience of the migratory contingent.

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