Quantifying an overlooked aspect of partial migration using otolith microchemistry

2020/09/03 by Mehis Rohtla, Lagle Matetski, Imre Taal +4 · 6 citations
Agricultural and Biological Sciences · Environmental Science · #Biology #Brown trout #Ecology #Estuary #Fish <Actinopterygii> #Fish Biology and Ecology Studies #Fish Ecology and Management Studies #Fish migration #Fishery #Marine and fisheries research #Microchemistry #Otolith #Sagitta #Salmo #Salmonidae #Trout

paper · doi:10.1111/jfb.14522

published in Journal of Fish Biology 97(5), 1582-1585 (Wiley)

openalex publication_date 2020/09/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

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.

Cited by

• Variable habitat use supports fine-scale population differentiation of a freshwater piscivore (northern pike, Esox lucius) along salinity gradients in brackish lagoons
• Anadromous trout from opposite sides of the globe: biology, ocean ecology, and management of anadromous brown and cutthroat trout
• Variable habitat use supports fine-scale population differentiation of a freshwater piscivore (northern pike, Esox lucius) along salinity gradients in brackish lagoons. [europepmc]

Related

• Anadromy, potamodromy and residency in brown trout Salmo trutta: the role of genes and the environment
• Do sea trout Salmo trutta parr surveys monitor the densities of anadromous or resident maternal origin parr, or both?
• Life-history variation of two inland salmonids revealed through otolith microchemistry analysis
• Anadromous Brown Trout (Salmo trutta) Contribute Disproportionally to Recruitment: Insights From Genomics and Multi‐Tissue Stable Isotope Chemistry
• Dispersal and Gene Flow Among Potential Spawners: Source–Sink Structure Among Populations of Anadromous Brown Trout Exposed to Multifaceted Anthropogenic Impacts