Over-summering behaviour of Atlantic salmon Salmo salar returning to rivers in the Cromarty Firth, north-east Scotland.
In 2005, a high percentage (50%) of Atlantic salmon Salmo salar fitted with acoustic transmitters, which entered rivers in the Cromarty Firth area of north-east Scotland, dropped back to the estuary and ascended adjacent rivers after 33-80 days of freshwater residence. Fish residing in non-natal rivers generate mixed stock fisheries, and movements of fish between rivers could increase the risk of disease transmission between catchments.
Stewart
D C
DC
Fisheries Research Services, Freshwater Laboratory, Faskally, Pitlochry, Perthshire, Scotland, U.K. d.c.stewart@marlab.ac.uk
Middlemas
S J
SJ
Mackay
S
S
Armstrong
J D
JD
D025041:Animal Migration; D000818:Animals; D045483:Rivers; D020317:Salmo salar / Q000502:physiology*; D012606:Scotland; D013686:Telemetry