The vertical behaviour of 44 veteran sea trout Salmo trutta (275–580 mm) in different marine fjord habitats (estuary, pelagic, near shore with and without steep cliffs) was documented during May–February by acoustic telemetry. The swimming depth of S. trutta was influenced by habitat, time of day (day v . night), season, seawater temperature and the body length at the time of tagging. Mean swimming depth during May–September w...

The early migration and habitat use of brown trout Salmo trutta post‐smolts tagged with acoustic transmitters ( n = 50) were investigated in a fjord system in central Norway from 30 April to 26 November 2014. The main aims were to investigate return rate, marine residence time and spatial use of the fjord system. Median seaward migration and return to fresh water dates were 22 May and 4 July, respectively. Of the 40 seaward mi...

In this study, behaviour and survival following catch‐and‐release (C&R) angling was investigated in wild Atlantic salmon Salmo salar ( n = 75) angled on sport fishing gear in the River Otra in southern Norway at water temperatures of 16·3–21·1° C. Salmo salar were tagged externally with radio transmitters and immediately released back into the river to simulate a realistic C&R situation. The majority of S. salar (91%) survived...

To estimate mortality rates, assess the spatio‐temporal dynamics of natural mortality and examine migratory behaviour during the fresh to saltwater transition, 185 wild Atlantic salmon Salmo salar smolts were implanted with coded acoustic transmitters. Seaward migration of tagged S. salar from four river systems in an area of Nova Scotia, Canada known as the Southern Upland was monitored using fixed receivers and active teleme...

The anadromous life cycle of Atlantic salmon Salmo salar involves long migrations to novel environments and challenging physiological transformations when moving between salt‐free and salt‐rich waters. In this article, (1) environmental factors affecting the migration behaviour and survival of smolts and post‐smolts during the river, estuarine and early marine phases, (2) how behavioural patterns are linked to survival and (3)...

Twenty five silver American eels, Anguilla rostrata (Lesueur), were sonically tagged to determine the passage success at a recently reconstructed hydroelectric facility on the Magaguadavic River, and to explore the environmental correlates of surviving eel movements through the coastal zone to the Bay of Fundy. Downstream movements of many eels were delayed at the dam and tagged fish moved extensively in the reservoir, presuma...

The strategy of releasing captive reared adult Atlantic salmon Salmo salar into the Magaguadavic River, New Brunswick, Canada, to spawn, was not an effective tool for rebuilding a seriously depressed wild population. The fish were first generation progeny from wild parents, and had spent their entire lives in captivity in either sea or fresh water. No differences in movement or behaviour patterns were observed between freshwat...