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1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1 <br />1981 <br />1982 <br />_ r----Z_ <br />1983 <br />1984 <br />~ ~_ <br />Q ----• <br />w <br />1985 <br />1986 <br />1987 <br />i~ ~~ i~ t ~ i ~ ~~ ~ <br />APR MAY JUN JUL AUG SEP OCT <br />Figure 8. Migrations of radiotagged Colorado squawfish ( ), <br />collections of ripe Colorado squawfish (--), and estimated <br />spawning times from backcalculation of larval Colorado <br />squawfish (- - -) as estimators of optimum spawning periods, <br />Yampa River, 1981-1987. (C~indicates presence of radiotagged <br />Colorado squawfish on spawning grounds) <br />18 <br />