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Last modified
7/14/2009 5:02:33 PM
Creation date
5/22/2009 6:45:56 PM
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UCREFRP
UCREFRP Catalog Number
8116
Author
Elmblad, W. R.
Title
Evaluation of Stocking Channel Catfish in Kenney Reservoir, Colorado.
USFW Year
1998.
USFW - Doc Type
Grand Junction, CO.
Copyright Material
NO
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fish increased from 3% in 1993, to 9% in 1994, and 14% in 1995, reflecting in some degree the-fact <br />that each year there were more marked fish in the population. There were no recaptures of marked <br />fish in 1996 and 1997, presumably because of the low catch. <br />Table 4. Ratios of stocked and wild recaptured channel catfish to the total number of channel catfish <br />captured in Kenney Reservoir. <br />Year 1993 1994 1995 1996 1997 <br />Stocked 3/97 10/108 4/28 0/12 0/14 <br />Wild 1/10 0/5 1/2 0/2 0/0 <br />Figure F-1 illustrates the increase in length measured during summer sampling of the stocked <br />channel catfish from 1993 to 1997. Modal values increased 50 mm from 1993 to 1994, 75 mm from <br />1994 to 1995, 125 mm from 1995 to 1996, and 25 mm from 1996 to 1997. Measured mean length <br />increased 18 mm from 1992 to 1993, 53 mm from 1993 to 1994, 94 mm from 1994 to 1995, 80 mm <br />from 1995 to 1996, and 40 mm from 1996 to 1997 (Figure F-2). Measured mean weight increased <br />37 g from 1992 to 1993, 87 g from 1993 to 1994, 347 g from 1994 to 1995, 392 g from 1995 to <br />1996, and 439 g from 1996 to 1997 (Figure F-3). <br />Habitat was described for the locations of gill and trammel net sets in 1993 to insure that all habitat <br />types were being sampled. The channel catfish catch for the general reservoir location descriptor <br />was: main lake (56), cove (27), and inlet (10). The channel catfish catch by substrate type was: <br />bedrock (30), riprap (0), dirt + rock > 0.3 m (33), dirt + rock < 0.3 m (20), and dirt/mud (10). The <br />catch by shoreline gradient was: steep (72) and shallow (21). <br />Sampling was not done by habitat type after 1993 in order to concentrate effort in the upper half of <br />the reservoir where the catch rates of channel catfish were highest. The inlet area, and particularly <br />sample sites with flowing water, produced the highest catches of channel catfish. Many sample sites <br />were sampled daily because they continued to produce channel catfish. Others have similarly found <br />greater numbers of channel catfish in the inlet areas of reservoirs during summer. Hubert and O'Shea <br />(1992) found channel catfish were more abundant in the upper portion of Crrayrocks Reservoir during <br />early summer. Elrod (1974) found that summer catches of channel catfish averaged 10 times higher <br />in the inlet area of Lake Sharpe than catches at other reservoir locations. <br />Eleven fish species were caught in Kenney Reservoir with gill and trammel nets in 1993 and 1994 <br />(Table C-1). Flanneimouth suckers and common carp were the most abundant species-with roundtail <br />chub, black crappie, and channel catfish common. When trammel nets were placed judiciously in <br />1994 to avoid lazge entanglements of carp, carp dropped from 37% to 10% of the total catch (Table <br />C-1). But at the same time flannelmouth suckers increased from 12% to 37% of the total catch <br />(Table C-1). None of the 96,597 juvenile Colorado pikeminnows stocked in Kenney Reservoir in <br />1988-1990 were found during this study. These fish show in the catches from 1989 and 1990 (Table <br />C-1). <br />11 <br />
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