2017
DOI: 10.1111/eff.12335
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Another paradigm lost? Autumn downstream migration of juvenile brown trout: Evidence for a presmolt migration

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Cited by 24 publications
(26 citation statements)
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“…Prior to 1995, and often still today, the emphasis of site‐specific studies was on recording fish within and/or exiting the fishway, usually by direct sampling of fish or use of fish counters, at the expense of considering passage as a process or mechanism relating to individual behaviour of adaptive value (Burnett et al., ; McLaughlin et al., ; Roscoe & Hinch, ). Even today, the description of the full migration systems and timing in well‐studied species of salmonids remains incomplete (Aarestrup, Birnie‐Gauvin, & Larsen, ; Winter, Tummers, Aarestrup, Baktoft, & Lucas, ). Fuller consideration of the adaptive value of fish movement, including passage at an obstacle, requires broader spatio‐temporal context (fine‐scale to landscape‐scale; Fausch, Torgersen, Baxter, & Li, ).…”
Section: The Missing Pieces: Knowledge and Tools Neededmentioning
confidence: 99%
“…Prior to 1995, and often still today, the emphasis of site‐specific studies was on recording fish within and/or exiting the fishway, usually by direct sampling of fish or use of fish counters, at the expense of considering passage as a process or mechanism relating to individual behaviour of adaptive value (Burnett et al., ; McLaughlin et al., ; Roscoe & Hinch, ). Even today, the description of the full migration systems and timing in well‐studied species of salmonids remains incomplete (Aarestrup, Birnie‐Gauvin, & Larsen, ; Winter, Tummers, Aarestrup, Baktoft, & Lucas, ). Fuller consideration of the adaptive value of fish movement, including passage at an obstacle, requires broader spatio‐temporal context (fine‐scale to landscape‐scale; Fausch, Torgersen, Baxter, & Li, ).…”
Section: The Missing Pieces: Knowledge and Tools Neededmentioning
confidence: 99%
“…Smolts typically migrate during the months of March to May depending on latitude (peak smolt migration period, e.g., Bohlin, Dellefors, & Faremo, ), though some migrate during the autumn (Winter et al, Aarestrup, Birnie‐Gauvin, & Larsen, ). The downstream smolt migration is thought to be triggered by a range of environmental factors, such as photoperiod, temperature, and discharge (Hoar, ).…”
Section: Introductionmentioning
confidence: 99%
“…Few have reported the sex ratio of the out-migrating brown trout smolts, but Jonsson (1985) observed a female excess in the Voss River, Norway. In autumn migrating brown trout pre-smolts, Aarestrup, Birnie-Gauvin, and Larsen (2018) reported that in the River Lilleaa, Denmark, there were as much as 68% females. Also in the present systems, we expect that females were in access among out-migrating smolts, as more males than females matured early and were river resident.…”
Section: Discussionmentioning
confidence: 99%