Unsupervised estimation of the age at sea departure of Atlantic salmon using magnesium, manganese, and zinc otolith chemistry

Investigating the age at sea departure of returning Atlantic salmon is critical to better understand the role of emigration timing in survival. Among the methods available, the use of otolith chemistry can be challenging in anadromous fish, as the elements frequently used (i.e., magnesium, manganese...

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Bibliographic Details
Published in:Journal of fish biology 2024-09, Vol.105 (3), p.1025-1030
Main Authors: Fontaine, Anthony, Vignon, Matthias, Tabouret, Hélène, Pécheyran, Christophe, Bareille, Gilles
Format: Article
Language:English
Subjects:
Age
Age determination
Anadromous fishes
Anadromous species
Analytical chemistry
chemical calendar‐clock
Chemical Sciences
Emigration
Environmental conditions
Estimation
Fish
Freshwater fishes
functional clustering
Magnesium
Manganese
Marine fishes
Material chemistry
Metabolism
migration
or physical chemistry
Polymers
Salmo salar
Salmon
Theoretical and
Zinc
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Summary:Investigating the age at sea departure of returning Atlantic salmon is critical to better understand the role of emigration timing in survival. Among the methods available, the use of otolith chemistry can be challenging in anadromous fish, as the elements frequently used (i.e., magnesium, manganese, and zinc) can jointly reflect individual metabolism and environmental conditions. Here, we present a new unsupervised and robust method for successfully estimating the outmigration age of Atlantic salmon in the Bay of Biscay, based on otolith zinc concentrations.
ISSN:0022-1112
1095-8649
1095-8649
DOI:10.1111/jfb.15829