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1 <br />I <br />1 <br />[1 <br /> <br />I <br /> <br />I <br />150 <br />_m <br />F- 12 5 <br />_0 <br />15- 100 <br />D <br />Q 75 <br />E <br />E 50 <br />2 <br />C? 25 <br />Z <br />W <br />J <br />0 <br />FISH CHALET POND <br />COLORADO SOUFWFISH <br />1986 1987 1988 <br />- TL (mm) + WT (g) - Condition (K) <br />0.8 <br />0.75 <br />0.7 Y <br />Z <br />O <br />0.65 1.- <br />0 <br />Z <br />0.6 O <br />U <br />0.55 <br />.5 <br />' Figure 2. Mean total length, weight and body condition of Colorado squaw- <br />fish in Fish Chalet Pond stocked on 28 August 1986. <br />Colorado squawfish growth (defined here as an increase in length) com- <br />mences when water warms above 13 C (Osmundson 1987, Kaeding and Osmundson <br /> 1988). Black and Bulkley (1985) found that maximum growth of fingerling <br /> squawfish fed unlimited food occurred around 25 C under laboratory condi- <br /> tions, and growth at 20 C was only 54% that at 25 C; at 15 C, it was 18%. <br /> In Fish Chalet Pond, mid-depth temperatures rose above 13 C in mid April, <br /> d <br />d <br />d 20 C f <br /> an <br />excee <br />e <br />rom mid May to mid September (Fig. 3). Metabolic <br /> demands should have been greatest between mid June and late August when <br /> temperatures were 22-27 C. If food had been plentiful, this should have <br />1 been the period of most rapid growth. In 1987, length and weight began to <br /> increase in April, but growth leveled off in July and August, suggesting <br /> th <br />t f <br />d h <br />d b <br /> a <br />oo <br />a <br />ecome limiting. This speculation finds support in the mean <br />1 condition values, which had been increasing since April but fell from 0.69 <br />