Résumé
Despite that the study of individual repeatability is a common topic in behavioral ecology, virtually nothing is known about inter-annual variability in the marine migratory behavior of iteroparous salmonids that can complete multiple feeding migrations in their lifespan. Behavioral data from 38 anadromous brown trout (Salmo trutta), tracked by acoustic telemetry in 2–3 consecutive marine feeding migrations in two Norwegian fjord systems, were analyzed for intra-individual repeatability in key aspects of their marine migration. Individual brown trout displayed significant inter-annual consistency in marine area use and in the timing of marine exit (i.e. when they returned to spawning rivers), but not in the timing of marine entry or the time spent in the marine environment each year. Our study raises new questions about how anadromous brown trout respond to changing conditions and anthropogenic factors in the marine environment. Intra-individual repeatability of brown trout linked to changing environmental conditions should therefore be a focus for future studies.
| Langue d'origine | English |
|---|---|
| Numéro d'article | 420 |
| Journal | Frontiers in Ecology and Evolution |
| Volume | 7 |
| DOI | |
| Statut de publication | Published - nov. 1 2019 |
Note bibliographique
Funding Information:This study was part of the CHASES project funded by the Research Council of Norway (ref: 255110/E50). The tracking study in Tosenfjord was financed or supported by contributions from Sinkaberg-Hansen AS, the County Governor of Nordland, Nordland County Authority, The Norwegian Environment Agency, The river Åbjøra landowners’ association, Phlates Eiendommer, The Natural Sciences and Engineering Research Council of Canada, Ocean Tracking Network, and the NTNU University Museum. The tracking study in Hemnfjord was financed or supported by contributions from the Hemne municipality, the County Governor of Sør-Trøndelag, Sør-Trøndelag County Authority, The Norwegian Environment Agency, AquaGen AS, the Norwegian institute for Nature Research, the Lake Rovatnet landowner’s association, TrønderEnergi AS, DTU aqua, UiT the Arctic University of Norway, Ocean Tracking Network, and the NTNU University Museum.
Funding Information:
The crew of RV Gunnerus, Lars R?nning, Jan Ivar Koksvik, Aslak Darre Sjursen, Martin Georg Hansen, Ola Magne Taft?, Hans Erlandsen, Vegard Pedersen Sollien, Paul Skarsv?g, Stein Hugo Hemmingsen, Kristian Lian, Embla ?stebr?t, Hilde D?rum, Kristina Johansen and Ashley Ann, Ole Johan Hornenes, Torjus Haukvik, and Charlotte Hallerud are all thanked for their extensive help during fieldwork. The experimental procedures were approved by the Norwegian National Animal Research Authority (permission number 2012/22965 & 2015/8518). Funding. This study was part of the CHASES project funded by the Research Council of Norway (ref: 255110/E50). The tracking study in Tosenfjord was financed or supported by contributions from Sinkaberg-Hansen AS, the County Governor of Nordland, Nordland County Authority, The Norwegian Environment Agency, The river ?bj?ra landowners' association, Phlates Eiendommer, The Natural Sciences and Engineering Research Council of Canada, Ocean Tracking Network, and the NTNU University Museum. The tracking study in Hemnfjord was financed or supported by contributions from the Hemne municipality, the County Governor of S?r-Tr?ndelag, S?r-Tr?ndelag County Authority, The Norwegian Environment Agency, AquaGen AS, the Norwegian institute for Nature Research, the Lake Rovatnet landowner's association, Tr?nderEnergi AS, DTU aqua, UiT the Arctic University of Norway, Ocean Tracking Network, and the NTNU University Museum.
Publisher Copyright:
© Copyright © 2019 Eldøy, Bordeleau, Crossin and Davidsen.
ASJC Scopus Subject Areas
- Ecology, Evolution, Behavior and Systematics
- Ecology
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