Movements of Planted and Wild Trout in an Idaho River System

Abstract

During 1959‐61, 10,000 catchable‐sized, hatchery‐reared, rainbow trout were jaw‐tagged and released in the upper Salmon River, Idaho, and 2,247, 619, and 539 wild cutthroat trout, Dolly Varden, and rainbow trout, respectively, were caught on hook and line, tagged, and released in the Middle Fork of the Salmon River. More than 1,500 of the tagged, hatchery‐reared, rainbow trout were recovered after being in the stream up to 1 year. Of those recovered the same season as released, more than 90 percent were taken within 2 miles of the release site. Ninety percent of those recovered after having been in the river over winter were taken within 5 miles of the release site. Of 253 tagged wild cutthroat trout recovered, 64 were recovered in release areas, and 189 were recaptured one or more miles from their release sites (average for the latter, about 19 miles). Of 95 tagged wild Dolly Varden recovered, 27 were recovered in the release areas, and 68 were recovered one or more miles from release sites (average for the latter, 22.2 miles). Twenty‐seven tagged wild rainbow or steelhead trout were recovered; 14 in release areas, and 13 downstream from the release sites. Only 25.3 percent of the cutthroat trout and 28.4 percent of the Dolly Varden were recovered within 1 mile of release sites.

Yakima River Radio-Telemetry Study, Rainbow Trout, 1993 Annual Report.

“…The majority of spawning migrations were less than 15 km in distance and were similar to the average 12.6 km migration in the Salmon River Basin, ID, reported for rainbow'trout by Bjornn and Mallet (1964).…”

Juvenile Movement among Different Populations of Cutthroat Trout Introduced as Embryos to Vacant Habitat

“…Salmonids from hatchery populations can move differently than wild fish (e.g., Bjornn and Mallet 1964;Richards and Cernera 1989;Bettinger and Bettoli 2002;Baird et al 2006). Young hatchery-origin salmonids can also grow more quickly and behave more aggressively than Downloaded by [University of New Orleans] at 08:10 09 December 2014 individuals from wild populations (Rhodes and Quinn 1999;Tatara and Berejikian 2012).…”

Metapopulation Structure of Bull Trout: Influences of Physical, Biotic, and Geometrical Landscape Characteristics

“…The potential for spatial autocorrelation due to unmeasured environmental characteristics was examined but rejected as a likely alternative explanation to dispersal. Some bull trout have been shown to move over relatively long (>50 km) distances in streams (Bjornn and Mallet 1964, Swanberg 1997). Larger (>150 mm) individuals may undergo extensive seasonal feeding and spawning migrations within stream basins (Swanberg 1997), but juveniles and resident individuals may be restricted in their movements (Rieman and McIntyre 1993).…”