2016/07/01 by M. A. Kirk, Mark A. Kirk, Christopher C. Caudill +5 · 1 citation
Engineering · Environmental Science · #Biomimetic flight and propulsion mechanisms #Fish Ecology and Management Studies #Hydrology and Sediment Transport Processes
paper · doi:10.1111/fme.12179
openalex publication_date 2016/07/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/29
Abstract The swimming capabilities of adult Pacific lamprey, Entosphenus tridentatus Gairdner, were tested in an experimental vertical‐slot fishway in response to three different fishway features: water velocity (1.2, 1.8 and 2.4 m s −1 ), the length of the vertical slot (0.33, 0.66, 1.00 m) and during the presence/absence of a turbulence‐intensifying structure that increased turbulence for each respective treatment. Passage success was lowest (52.7%) and attachment rates were highest (92.9%) during the most difficult passage conditions (high velocity, high turbulence, long slot length). Passage success was >83% for all other treatment combinations. Although passage of the vertical‐slot weir was not associated with fish body size, Pacific lamprey with larger dorsal distances (distance between the two dorsal fins) were more likely to pass the vertical‐slot weir. Increased attachment rates and longer attachment times during strenuous passage conditions suggest that endurance capacity may be an important factor limiting the passage of Pacific lamprey at fishway obstacles.