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<br /> CHANNEL CATFISH-YAtlPA RIVER <br /> LEHGTH DISTRIBUTIOH BY RKI <br /> - <br /> . <br /> ~ . <br /> . . <br /> . <br /> - . <br />~ <br />e ~ . <br />~ . <br />~ <br />~ - <br />~ . <br />" I <br />~ - . <br />~ <br />~ . <br />~ <br /> - I <br /> I . <br /> a <br /> . <br /> - . . <br /> . <br /> . <br /> - <br /> . . m m ~ <br /> RiTer aile <br /> <br />Figure 6. Length frequency distribution of Yampa River channel catfish <br />by river mile capture location. <br /> <br />factor for Yampa catfish appears to be a median value relative to condition <br />factors reported in Carlander (1969), suggesting Yampa channel catfish are in <br />satisfactory condition. Many catfish captured during the summer and fall <br />periods, however, appeared moderately to heavily parasitized by leeches. <br />Spawning condition and stomach contents were not examined in channel <br />catfish at this time due to the higher priority of releasing tagged <br />individuals for movement and recapture data. However, it was interesting to <br />note that in one large female (670 mm TL) captured October 18, 1988, the <br />ovaries were still full of eggs, suggesting this fish's gonads had not been <br />able to fully mature and ripen during the available warm water season. <br />Similar to results for northern pike, numerous sampling efforts in 1987- <br />1988 resulted in no channel catfish YOY or juveniles observed in the three <br />reaches in which channel catfish adults were collected. <br /> <br />18 <br />