Laserfiche WebLink
larvae/acre along with razorback sucker at the same density showed a survival rate of 16 <br />- 17%. Total number of surviving razorback sucker collected from the enclosures was <br />616 in 2003 and 1,095 in 2004. The total number of Bonytail collected was 10 in 2003 <br />and over 300 in 2004. Estimated larval razorback sucker survival in the experimental <br />enclosures ranged from 0 - 58% and growth rates averaged 0.6 mm/day in 2003 and 0.6 <br />mm/day in 2004 in the presence of nonnative predators. Larval razorback sucker survival <br />was detected 88 days following introduction at a density as low as 4001arvae/acre. <br />Bonytail larvae introduced sympatric with razorback sucker larvae at a density of 8,000 <br />larvae/acre had an estimated survival of 16 - 17% in 2004 and a growth rate of 0.6 <br />mm/day in 2003 and 0.4 mm/day in 2004. Larval Bonytail survival was detected 106 <br />days following introduction in 2003. Larval Bonytail survival was detected 66 days <br />following introduction sympatrically with razorback sucker larvae in 2004 at a density of <br />8,000 larvae/acre. <br />It is recommended that actions to identify, monitor, and manage variables and <br />conditions necessary to achieve entrainment of at least 4001arvae/acre should be <br />implemented. Floodplain wetlands of the middle Green River should continue to be <br />managed based on the reset theory. Even with abundant nonnative fish predators, these <br />habitats are important to recovery of endangered fish. <br />ix <br />