Downstream migration and multiple dam passage by Atlantic Salmon smolts

North American Journal of Fisheries Management
By: , and 



The purpose of this study was to investigate behavior and survival of radio-tagged wild and hatchery-reared landlocked Atlantic Salmon Salmo salar smolts as they migrated past three hydropower dams equipped with fish bypass solutions in the Winooski River, Vermont. Among hatchery-reared smolts, those released early were more likely to initiate migration and did so after less delay than those released late. Once migration was initiated, however, the late-released hatchery smolts migrated at greater speeds. Throughout the river system, hatchery-reared fish performed similarly to wild fish. Dam passage rates varied between the three dams and was highest at the dam where unusually high spill levels occurred throughout the study period. Of the 50 fish that did migrate downstream, only 10% managed to reach the lake. Migration success was low despite the presence of bypass solutions, underscoring the need for evaluations of remedial measures; simply constructing a fishway is not synonymous with providing fish passage.

Study Area

Publication type Article
Publication Subtype Journal Article
Title Downstream migration and multiple dam passage by Atlantic Salmon smolts
Series title North American Journal of Fisheries Management
DOI 10.1080/02755947.2017.1327900
Volume 37
Issue 4
Year Published 2017
Language English
Publisher Taylor and Francis
Contributing office(s) Leetown Science Center
Description 13 p.
First page 816
Last page 828
Country United States
State Vermont
Other Geospatial Winooski River
Google Analytic Metrics Metrics page
Additional publication details