Laserfiche WebLink
water out. Bawer was pumped with two 11-hp trash pumps for a week and then two <br />more pumps were added for two additional days of pumping. <br />Originally the study was to have two enclosures used as controls. However, due <br />to the over topping of the enclosures as a result of the high river flows and the resulting <br />introduction of nonnative fishes, controls without nonnative species were not possible <br />and control of nonnative fish density in treatment enclosures was compromised. A total <br />of 17,000 razorback sucker larvae obtained from Ouray National Fish Hatchery were <br />introduced into the twelve enclosures at six different densities on 20 June 2003 (Table 1). <br />Table 1. Summary of razorback sucker and bonytail larvae introduced into each <br />1/8-acre enclosure at the Baeser floodplain wetland, Green River (RM <br />273): 2003 <br />Enclosure Density Razorback Bonytail Total <br /> Larvae/Acre sucker <br />lA 800 100 100 <br />1B 800 100 100 <br />2A 1,200 150 150 <br />2B 1,200 150 150 <br />3A 4,000 500 500 <br />3B 4,000 500 500 <br />4A 8,000 1,000 1,000 2,000 <br />4B 8,000 1,000 1,000 2,000 <br />SA 18,000 2,250 2,250 <br />SB 18,000 2,250 2,250 <br />6A 36,000 4,500 4,500 <br />6B 36,000 4,500 4,500 <br /> Total 17,000 2,000 19,000 <br />Water Quality Measurements <br />Water quality was monitored to ensure adequate conditions for survival and <br />growth of larval fish. When water quality and/or depth degraded to point that it <br />threatened fish survival, fresh water was pumped into the site from the river. Water <br />temperature and depth was monitored at least bi-weekly throughout the experiment <br />5 <br />