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Last modified
7/14/2009 5:02:36 PM
Creation date
5/22/2009 7:31:32 PM
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UCREFRP
UCREFRP Catalog Number
9523
Author
Birchel, G. J. and K. Christopherson.
Title
Survival, Growth and Recruitment of larval and Juvenile Razorback Suckers (Xyrauchen texanus) Introduced into Floodplain Depressions of the Green River, Utah.
USFW Year
2004.
USFW - Doc Type
Vernal.
Copyright Material
NO
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<br />July) at the hatchery and 224 grams in Baeser Bend (61 g 28 July to 285 g September). <br />~ Growth rates for these fish while at the hatchery were 0.8 mm/day and 0.3 grams/day <br />compared to 1.5 mm/day and 1.4 grams/day after being stocked into Baeser Bend <br /> <br />(Figure 16). <br />In spring 2000, razorback sucker that were stocked in April 1999 into Baeser <br />Bend averaged 353 mm and 526 grams and those stocked in July averaged 294 mm <br />~ and 341 grams (Figure 17). Following the second growing season (late summer 2000) <br />April stocked fish averaged 409 mm and 722 grams (Figure 17). July stocked fish were <br />similar at 391 mm and 661 grams. Average growth rates for the second growing <br />~ season were 0.3 mm/day and 1.2 grams/day (Figure 18). <br />Baeser Bend is the only site where age-1 fish that were stocked in April 2000 <br />survived. These fish averaged 103 mm at the time of stocking and grew to 282 mm by <br />August (Figure 17). Weight gains averaged 231 grams (12.8 g at stocking to 244 g). <br />Average growth rates these fish were similar to growth rates for fish stocked in 1999. <br />~ Fish stocked in 2000 averaged 1.4 mm/day and 1.8 grams/day compared to 1.4 <br />mm/day and 2.7 grams/day in 1999 (Figures 19 and 16). <br />Monitoring movement to the river <br />~ The first river-floodplain connection period following the April 1999 stocking <br />occurred between 12 May and 25 June 1999. Connections in 1999 were maintained for <br />52 days at Above Brennan, 33 at Baeser Bend and 31 at The Stirrup. During this <br />connection period following the April 1999 stocking only two razorback sucker were <br />caught in traps set to catch fish leaving the sites (Table 2). Both of these fish were <br />~ caught at Baeser Bend on the same day. These few captures, combined with <br />16 <br /> <br />
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