Depurtn~enr of Fisheri~s and Oceans, Central and Arctic Region.

• Main Authors: Smallmouth Bass, Two Denil Fishways, Munitoha Rt N
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Arctic; Weir
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.309.9018; http://www.stream.fs.fed.us/fishxing/fplibrary/Bunt and others_1999.pdf

Ahslrurbt.-We compared two Uenil fishways, locatcd on the west (low velocity. 10 % slope) and east (high velocity, 20 % slope) sides of the Mannhcim weir. Grand River, OnLurio, for use by upstream-migrating white suckcrs Catostomus commersoni and smnllmouth bnfis Micropterus do-Iornieu. Mark-recapture and rndiotclcmctry were used to assess attraction and fish passagc. Moverncnt of 85 radio-lugged fish was monitored continuously during sprin ~ and early sulnmcr of 1995 and 1996. Attrnction and passage efficiencies of white suckers at thc west hshway were upproxinlately 50 % and 55%, respectively. Attraction efficiency of whitc suckers at the east fishway was approximately 59%. and passage efficicncy was 38%. The altrnction and passage efficiencies of smnllmouth huss at the west fishway were approximately 82 % and 36%. respectively. At thc cnst fishway, attraction efficiency of snldlmouth bass was npproximalely 55%, and passagc efficiency was 33%. Thcrc was an exponential decline in the numbers of both species Lhat used each fishway relative to watcr velocity. The maximum water velocity used by white suckers was 0.96 mls and that used by smallmouth bass was 0.99 m/s. Distracting flows near thc wcst fishwny nppeurtd to aflect attraction. Both fishways passed equal numbers uC smallmouth bass per year, nnd ~lnntlrnouth hnss that used the east fivhway were significantly larger thnn individtlals lh~l