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Last modified
7/14/2009 5:02:31 PM
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5/22/2009 6:43:36 PM
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UCREFRP
UCREFRP Catalog Number
7876
Author
Elmblad, W. R.
Title
The Outcome Of An Experimental Stocking Of Colorado Squawfish In Kenney Reservoir Near Rangely, Colorado - Final Report.
USFW Year
1997.
USFW - Doc Type
\
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In 1992 the upper reach was sampled on June 29. This time no <br />Colorado squawfish were captured even though the same backwater <br />that yielded three Colorado squawfish in 1991 was thoroughly <br />seined. Again, large numbers of young roundtail chubs were <br />collected. <br />No stocked or wild Colorado squawfish were captured in the lower <br />reach during this study. <br />CONCLUSIONS <br />The earlier study of stocked Colorado squawfish in Kenney Reservoir <br />conducted by Trammell et al. (1993) found that these fish rapidly <br />disappeared from the reservoir and the White River in the study <br />area. In fact she recaptured only 14 age 2 fish from a total of <br />over 96,000 fish stocked at age 1, and only four of these age 2 <br />fish were collected in Kenney Reservoir. No age 3 stocked Colorado <br />squawfish were found during her study. Trammell theorized the <br />disappearance of the Colorado squawfish was due to emigration from <br />the study area, mortality, and the difficulty of sampling fish in <br />the 100 - 250 mm TL size range. She thought that some stocked <br />Colorado squawfish may "reappear" at a larger size when they could <br />become more vulnerable to sampling. <br />The present study supports the findings of Trammell et al. (1993) - <br />- the stocked Colorado squawfish have either left or are very rare <br />in Kenney Reservoir and the White River in Colorado. Only four <br />stocked Colorado squawfish were collected during the present study, <br />all in the first year. Three of those fish were known to be age 2 <br />and the other was most likely age 2 based on its size. Only one of <br />those four fish were collected from Kenney Reservoir and no age 3 <br />or older stocked Colorado squawfish were found. <br />The present study sampled Kenney Reservoir for stocked Colorado <br />squawfish that had grown older and larger since Trammell's study <br />(Trammell et al. 1993). These larger fish should have started to <br />appear during the present study if gear selectivity towards larger <br />fish was limiting sampling efficiency. Sampling of Kenney <br />Reservoir has continued annually through 1996 by use of trammel <br />nets, gill nets, and electrofishing; yet no additional stocked <br />Colorado squawfish have been collected (author, unpublished data). <br />Results from the present study show there are few, and very <br />possibly not any, stocked Colorado squawfish left in Kenney <br />Reservoir to provide a sportfishery. In conclusion, the attempt to <br />create a Colorado squawfish sportfishery in the reservoir by <br />stocking was unsuccessful. This conclusion is supported by <br />Trammell's study (Trammell et al. 1993) and by the more recent <br />study of Colorado squawfish in the White River by Irving and Modde <br />(1994) . <br />8 <br />
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