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DISCUSSION 39 <br />39 <br />Sympatric Species ...................................... <br />YOY Colorado Pikeminnow . ............. ....... ..... .... .... 41 <br />Distribution ....... ....... .... ...... ... ... . 41 <br />Relative Abundance . ........... ........... ......... .... 42 - <br />Growth . ................. ......................... ... 46 <br />Overwinter Survival ... .............. ... ...:.......... ... 46 <br />Management Implications ...................... ....... ........ ..... 48 <br />CONCLUSIONS ............. . .............. ..... . ................... 50 <br />RECOMMENDATIONS ............. ........... ..... ........ .. .... 51 <br />LITERATURE CITED ... .... ........... ........... ..... ......... 51 <br />LIST OF TABLES <br />Table Page <br />1. Pearson correlation coefficients between mean number of larvae collected <br />per sample and average high flow in spring, Colorado River, 1983 '- 1985 <br />and 1988 - 1994. .......... ...: ........ ................. .. 13 <br />2. Percentage of all fishes collected comprised of native species in three <br />sampling reaches, average high flow (average of mean-daily flows for 15 <br />days before and after the highest day of the year), and correlations <br />between the two for larval fish sampling, 1983 - 1985 and 1988 - 1994......... 14 <br />3. Pearson correlation coefficients describing the relationship between mean <br />CPE of larvae in July and August and mean CPE of fish in September <br />seine collections. ........... ..... ... .................. ... 15 <br /> <br />4. Pearson correlation coefficients between mean CPE calculated with the <br />first seine haul in primary backwaters and mean CPE calculated with all <br />seine hauls taken. ... .. . ................ .... ..... ........ 15 <br />5. Pearson correlation coefficients between geometric-mean CPE of six <br />species commonly collected with fall seining and average-high flow in <br />i <br />spring, 1983-1995.. ...... ......... ....... ................. 16 <br />6: Geometric mean catch per effort (CPE; fish/10m? and 95% confidence <br />intervals for red shiner, sand shiner, and fathead minnow from Reach 1, <br />lower Colorado River . ............................................. 17 <br /> <br /> <br />n