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} <br />~ .. <br />.. ~ 10 <br />loose. f~lales captured on the spawning grounds and at nearby locations <br />were all sperming and ready~to spawn. <br />Flannelmouth suckers were spawning at the same time in the same <br />sites, and were much more numerous, occurring roughly 5-8 times more <br />often than humpbacks. This would be expected because of the scarcity <br />of the humpbacks. One interesting point is that although humpbacks <br />are only available in this general area, at certain times of the year, <br />flannelmouths are available year-round. <br />.The other location on the Yampa was about 1.5 miles upstream from <br />its mouth, at Box Edler Park. One humpback sucker, a loose female, was <br />captured at this spot along with 8 sperming male fiannelmouth suckers. <br />The previous day a humpback had been turned while shocking but we were <br />unable to net it. <br />At this time, it is unknown how far up .t he Yampa River the hump- <br />back suckers move. As discussed earlier, attempts to follow the <br />fish as they moved upstream by using ultrasonic transmitters were not <br />very successful. Because of the time spent trying to use this equip- <br />ment,our sampling time was spent in one area and ire were unable to <br />document fish movement further upstream. Next spring a different tactic <br />will be used. At the time when the fish should be moving into the <br />Yampa River, upstream locations will be sampled as well as Echo Park. <br />The spawning site on the Colorado River was quite similar to the <br />other sites. At this location no humpback sucker was captured but one <br />was "turned" while electrofishing. This fish had one of our red anchor <br />tags in its back which indicates it had moved out of the gravel pit at <br />the llalker Wildlife Area into the river. Since the fish was not actually <br />handled we have no idea when it was tagged and how long it might have <br />been in the river. Subsequent electrofishing revealed no more <br />