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Last modified
8/11/2009 11:32:56 AM
Creation date
8/10/2009 3:21:49 PM
Metadata
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Template:
UCREFRP
UCREFRP Catalog Number
7326
Author
McAda, C. W., K. Seethaler and R. S. Wydoski.
Title
Progress Report June 1, 1974 - October 31, 1975 Investigations of the Movements and Ecological Requirements of the Colorado Squawfish and Humpback Sucker in the Yampa and Upper Green Rivers.
USFW Year
1975.
USFW - Doc Type
Logan, Utah.
Copyright Material
NO
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Y ~ ~ p <br />~ ~ ~ 8 <br />Fish in the Yampa River were followed for up to two weeks. In <br />most cases sightings were sporatic due to the problems mentioned <br />earlier. All fish were followed closely for two or three days after <br />release. Three of the fish were followed continuously for this time , <br />period. ~A11 except one fish immediately began to move slowly down- <br />stream. The exception traveled upstream for about 1/2 mile, stayed <br />there se~~eral days, and then moved downstream. This is the individual <br />who was followed for two weeks. <br />With two exceptions the fish were always located in quiet water <br />areas. This is probably due in part to the difficulty of "hearing" <br />fish located in swift vrater. On tvao occasions a fish remained in swift <br />water for periods of several hours. This area was very similar to the <br />areas where the humpbacks are believed to have been spawning. Although <br />the area was heavily sampled using electrofishing equipment and a one <br />hundred foot bag seine, the only fish collected was the tagged fish. <br />At no time was a transmitter equipped fTSh "heard" in the suspected <br />spawning areas.. <br />tdhen the rising water made it increasingly hazardous to continue <br />sampling and listening to the fish the trip was terminated. Subsequent <br />trips to the area and other locations up the Yampa and down the Green <br />have failed to reveal transmitter equipped fish. <br />Mark and recapture data is also limited. Two spaghetti tagged <br />fish have been recaptured and another was observed, although it was not <br />actually. captured. A loose female humpback sucker was captured on <br />the spawning area 1/2 mile up the Yampa two weeks after she had been <br />captured and released at Island Park, thirteen miles downstream on the <br />Green River._ This is a good indication of a spawning migration. None <br />of the three fish tagged at Echo Park last fall were recaptured this <br />
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