Environmental, anthropogenic, and dietary influences on fine-scale movement patterns of Atlantic salmon through challenging waters
Canadian Journal of Fisheries and Aquatic Sciences
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Abstract
Partial barriers to migration can affect migratory fish population dynamics and be influenced by many biotic, abiotic, and anthropogenic factors, including nutritional deficiencies. We investigated how such variables (including a thiamine deficiency) impact fine-scale movement of landlocked Atlantic salmon (Salmo salar) by treating returning spawners with thiamine and observing their attempts to climb a human-altered, high velocity stretch of river using fine-scale radio telemetry. Multiple re-entries into a river section, along with water temperature, strongly influenced movement rates. High or increasing discharge encouraged downstream movement; males abandoned migratory attempts at a higher rate than females. Although thiamine-injected salmon exhibited greater migratory duration, this did not produce a measurable improvement in passage performance, possibly due to the difficulty associated with this section of river — among 24 tagged salmon staging 10.9 attempts each and lasting 1.5 days per attempt on average, only three traversed the entire reach. This study provides new insights into how biotic and abiotic variables affect fish movement, while suggesting limits to the potential for human intervention (thiamine injections) to assist passage through partial migratory barriers.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Environmental, anthropogenic, and dietary influences on fine-scale movement patterns of Atlantic salmon through challenging waters |
| Series title | Canadian Journal of Fisheries and Aquatic Sciences |
| DOI | 10.1139/cjfas-2017-0476 |
| Volume | 75 |
| Issue | 12 |
| Year Published | 2018 |
| Language | English |
| Publisher | Canadian Science Publishing |
| Contributing office(s) | Leetown Science Center |
| Description | 13 p. |
| First page | 2198 |
| Last page | 2210 |
| Country | United States |
| State | New York, Vermont |
| Other Geospatial | Willsboro Rapids |
| Google Analytic Metrics | Metrics page |