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high-density enclosures stocked at 40,000 larvae/acre. Approximately 200 surviving <br />bonytail were transferred to The Stirrup floodplain wetland. <br />DISCUSSION <br />The essence of the reset theory is the timing of larvae entering the floodplain. <br />Evidence from this study and the study conducted at The Stirrup in 2002 (Christopherson <br />et al. 2004) indicates that endangered larval fish can withstand the predation from the <br />relatively few adult nonnative fish that enter the floodplain at connection. The Stirrup <br />study demonstrated that larval razorback sucker and bonytail survival could occur <br />following a reset of nonnative fish populations. This study was designed to provide an <br />estimate of the minimum density necessary to detect survival. This study demonstrated <br />that fall YOY survival can be detected following spring larval fish density is as low as <br />4001arvae/acre in experimental enclosures and survival was detected in both years (2003 <br />and 2004) at densities of 1,200 - 4,000 larvae/acre. Entrainment of larval razorback <br />sucker at a density of 4001arvae/acre into a wetland should result in survival of razorback <br />sucker in the fall. There are several variables and conditions necessary to achieve this <br />density of naturally produced wild razorback sucker larvae in a floodplain wetland. <br />These include: <br />1) An adequate number of spawning adults. <br />2) Proximity of the wetland to the area of spawning. <br />3) Survival of drifting larvae. <br />4) Dynamics of river flows and conditions required to entrain larvae into the <br />floodplain wetland. <br />20 <br />