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<br />The evaluation inside the enclosures was terminated the end of July. Sampling inside <br />and outside the enclosures began on 7/22/02 and ended on 8113102. Sampling outside the <br />enclosures occurred to evaluate escapement of larval fish from the enclosures. All fish were <br />captured with fYke nets that were set overnight. Fish were removed from the control pen with a <br />seine on 7/31/02 and 8/01102. Total length and weight were recorded for a sub-sample of <br />razorback suckers that were captured in each area. Razorback suckers captured inside the <br />enclosures were counted and released outside the enclosures into the main wetland. Population <br />estimates for razorback suckers and nonnative fish captured inside the enclosures were generated <br />using a removal estimator. Nonnative fish that were captured were enumerated and removed <br />from the site. <br /> <br />Population estimate for razorback suckers were estimated at 403 fish (:!: 137) in the low <br />density enclosure and at 1,622 fish (:!: 445) in the high density enclosure. Outside the enclosure <br />there were an estimated 1,363 razorback suckers (:!: 884). In the control pen 118 razorback <br />suckers were caught. Average lengths for these fish were 70 mm in the low density enclosure, <br />58 mm in the high density, 69 mm in the control and 90 mm outside the enclosures (Appendix <br />Table I). <br /> <br />Nonnative captures totaled 33,874 fish in the low density enclosure, 26,763 in the high <br />density enclosure and 11,248 outside the pens. Species composition in the low density pen was <br />18,419 green sunfish, 11,939 fathead minnows, 3,425 black bullheads and 91 red shiners. In the <br />high density enclosure there were 14,909 green sunfish, 7,779 fathead minnows, 4,000 black <br />bullheads and 75 red shiners. Outside the enclosures 6,080 fathead minnows, 3,478 green <br />sunfish, 1,677 black bullheads and 13 red shiners were captured (Appendix Table I). <br /> <br />Sampling was also conducted in the main wetland in early October to determine average <br />growth of razorback suckers for the summer and to continue survival estimates. Fyke nets were <br />set at the wetland on 30 September- 3 October and again on 7 October. The population <br />estimate for razorback suckers still remaining in the site was 2,461 :!: 1024. Average size was <br />163 mm and 53 grams. There were also 13,355 fathead minnows, 2,568 green sunfish, 2,576 <br />black bullheads and 23 red shiners captured (Appendix Table 2). <br /> <br />Task 3: Data coordination, entry and analysis <br /> <br />Most data entry and coordination between principle investigators has accomplished for <br />this year of the study. Data analysis has been initiated. <br /> <br />Task 4: Report preparation <br /> <br />-Annual RIP Report due December 2002 completed <br />-Annual RIP Report due December 2003 <br />-Final Report due July 15,2004 <br /> <br />C-6 rz page 3 <br />