Population density of migratory and resident brown trout (Salmo trutta) in relation to altitude: evidence for a migration cost

By T. Bohlin, J. Pettersson, E. Degerman. 2001

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Energetics and morphology of sockeye salmon: effects of upriver migratory distance and elevation (2004, result): “…17 to 430m elevation) are much smaller than those experienced by the Fraser sockeye salmon in this study, but migration distance appears to be the factor most directly responsible for the differences observed in this and other studies (Blair et al., 1993; Bohlin et al., 2001; Quinn et al., 2001).”
There and back again: migration in freshwater fishes (2014, background): “Bohlin et al. (2001) elegantly revealed a more rapid decrease in juvenile fish density with increased elevation among anadromous populations compared with resident populations.”
Effects of salmon lice Lepeophtheirus salmonis on wild sea trout Salmo trutta—a literature review (2015, background): “Anadromy evolves in response to trade-offs between the costs and benefits of migration compared with 103 Aquacult Environ Interact 7: 91–113, 2015 residency, and these are balanced through their effect on fitness (Jonsson & Jonsson 1993, 2006, Bohlin et al. 2001, Ferguson 2006, Solomon 2006).”
Effects of habitat fragmentation by damming on salmonid fishes: lessons from white-spotted charr in Japan (2009, background): “Only resident forms can populate above-dam habitats, so spawning biomass is decreased in above-dam populations (Morita et al. 2000; cf. Bohlin et al. 2001 ).”