Release during night enhances survival of wild Atlantic salmon smolts
作者： K. W. Vollset , B. T. Barlaup , E. S. Normann
DOI: 10.1111/FME.12230
关键词:
摘要: The effect of nocturnal and diurnal releases on survival migration wild hatchery-reared Atlantic salmon, Salmo salar, L., smolts (n = 82) was investigated by releasing acoustically tagged at the lower end River Vosso, Norway. Hatchery registered in estuary within hours their release, whereas migrated over a prolonged period. time exit affected river discharge but not release. Progression rates were slow through (0.25 BL/s ± 0.18 SD) fast fjord (1.80 BL/s ± 0.69 SD), they release or origin. Survival to low (0%–15%). body length for than hatchery smolts, former when fish released daylight.
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