Quantifying an overlooked aspect of partial migration using otolith microchemistry.

Autor: Rohtla M; Estonian Marine Institute, University of Tartu, Tartu, Estonia., Matetski L; Estonian Marine Institute, University of Tartu, Tartu, Estonia., Taal I; Estonian Marine Institute, University of Tartu, Tartu, Estonia., Svirgsden R; Estonian Marine Institute, University of Tartu, Tartu, Estonia., Kesler M; Estonian Marine Institute, University of Tartu, Tartu, Estonia., Paiste P; Department of Geology, University of Tartu, Tartu, Estonia., Vetemaa M; Estonian Marine Institute, University of Tartu, Tartu, Estonia.
Jazyk: angličtina
Zdroj: Journal of fish biology [J Fish Biol] 2020 Nov; Vol. 97 (5), pp. 1582-1585. Date of Electronic Publication: 2020 Oct 01.
DOI: 10.1111/jfb.14522
Abstrakt: 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.
(© 2020 Fisheries Society of the British Isles.)
Databáze: MEDLINE
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