A1 Refereed original research article in a scientific journal
Increasing temperature associated with increasing grilse proportion and smaller grilse size of Atlantic salmon
Authors: Irma Kallio-Nyberg, Irma Saloniemi, Marja-Liisa Koljonen
Publisher: WILEY
Publication year: 2020
Journal: Journal of Applied Ichthyology
Journal name in source: JOURNAL OF APPLIED ICHTHYOLOGY
Journal acronym: J APPL ICHTHYOL
Volume: 36
Issue: 3
Number of pages: 10
ISSN: 0175-8659
eISSN: 1439-0426
DOI: https://doi.org/10.1111/jai.14033
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/46943251
Effects of temperature on Atlantic salmon (Salmo salar) were analysed using Carlin tag recovery data (1985-2014), and mixed-stock catch data (smolt years from 2001 to 2012) in northern parts of the Baltic Sea. During warmer summers, the mean smolt length of the recaptured salmon tended to be smaller, and salmon were recaptured more frequently in feeding grounds closer to the home rivers in the Gulf of Bothnia, while colder summers were associated with more recaptures further south, in the Baltic Main Basin. Moreover, a warmer spring in the smolt year was associated with decreased weight of male grilses in mixed stock data. Further, warmer spring temperatures during the smolt year were associated with a higher proportion of one-sea-winter (1SW) males during the return migration in mixed stock data. These results suggest that the increasing global temperature may affect Atlantic salmon life history demographics.
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