title: Over-summering behaviour of Atlantic salmon Salmo salar returning to rivers in the Cromarty Firth, north-east Scotland.
abstract: 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.
authors.affiliation: Fisheries Research Services, Freshwater Laboratory, Faskally, Pitlochry, Perthshire, Scotland, U.K. d.c.stewart@marlab.ac.uk
authors.forename: D C
authors.initials: DC
authors.lastname: Stewart
authors.forename: S J
authors.initials: SJ
authors.lastname: Middlemas
authors.forename: S
authors.initials: S
authors.lastname: Mackay
authors.forename: J D
authors.initials: JD
authors.lastname: Armstrong
mesh_terms: D025041:Animal Migration; D000818:Animals; D045483:Rivers; D020317:Salmo salar / Q000502:physiology*; D012606:Scotland; D013686:Telemetry