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-54- <br />Table 23. Length frequency of lake trout captured by gill net from <br />Flaming Gorge Reservoir, fall, 1977. <br />Length Class Number Captured Number Ripe <br />200 - 249 8 0 <br />250 - 299 3 0 <br />300 - 349 7 0 <br />350 - 399 7 0 <br />4oo - 449 8 0 <br />450 - 499 3 0 <br />500 - 549 6 0 <br />550 - 599 2 0 <br />boo - 649 0 0 <br />650 - 699 2 1 <br />700 - 749 1 1 <br />750 - 799 2 2 <br />8oo - 849 3 3 <br />850 - 899 1 1 <br />goo - 949 0 0 <br />950 - 999 0 0 <br />1,000 - 1,049 1 1 <br />so otoliths and branchiostegal rays were also collected for ageing. <br />These structures have not yet been analyzed and age-growth data for <br />these fish will be presented in the 1978 performance report. <br />Discussion <br />The amount of data collected in 1977 was small and hard con- <br />elusions should not be made. The data do begin to answer a few basic <br />questions, however. Spawning apparently occurs over a relatively <br />short period of time, on the order of two weeks, near the first week <br />or two of November. The lake trout seem to be spawning throughout <br />the lower reservoir, as evidenced by ripe fish being captured in all <br />three areas where nets were set. All sets were made on steep, rocky <br />slopes which appeared to offer suitable spawning habitat for lake trout.