9554

• UCREFRP Catalog Number: 9554
• Author: Monroe, L. and T. Hedrick.
• Title: Northern Pike ‎(Esox lucius)‎ Control in the Middle Green River, Utah 2001-2006.
• USFW Year: 2008.
• USFW - Doc Type: 109,
• Copyright Material: NO

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activity in 2004. Between the three efforts, 18 northern pike were removed (Table 2). The

Colorado pikeminnow abundance estimates did not occur in 2004; however, crews spent 147

hours electrofishing for another project, smallmouth bass removal, and removed an additional

nine northern pike from the river (Table 3). Mean total length of all pike removed was 558 mm

(371 mm - 834 mm) (Table I; Figure 4). The greatest concentration of pike was again removed

from the Thunder Ranch to Walker Hollow reach in 2004, though seven pike were removed

between Razorback Bar (Green River RKM 500.5 (RM 311)) and Thunder Ranch (Green River

RKM 487.6 (RM 303) as well (Table 4).

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2005

Electrofishing for northern pike removal began on 11 April 2005, ended on 25 June, and

took 32 sampling days to complete (Table 1). Crews fished for a total of 8.5 hours for this project

(Table 2). Fyke netting began on 21 March and was completed on 16 June. This effort consisted

of 227 fyke net nights. Crews continued to trammel net for northern pike between 24 March and

24 June and spent a total of26 hours on this activity in 2005. Between the three efforts, 29

northern pike were removed (Table 2). Crews spent 80.4 hours electrofishing for smallmouth

bass removal and removed an additional three northern pike from the river (Table 3). Mean total

length of northern pike was 638 mm (388 mm - 870 mm) (Table 1; Figure 4). By far, the

majority of pike were again removed from the Thunder Ranch to Walker Hollow reach of the

middle Green River (Table 4).

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2006

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18

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