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21 <br /> <br /> <br />No razorback sucker (Xyrauchen texanus) larvae or juveniles were collected <br />in 1981, nor were any reported by Wick et al. (1981), Miller et al. (1982a) <br />or Miller et al. (1982b) for the years 1977-81. The collection of ripe <br />adults by the above authors in several areas of the Colorado and Yampa <br />Rivers suggests that, while spawning may occur, it is probably quite <br />limited and that hatching and/or larval survivorship is very low if it <br />occurs at all. <br />Razorback Sucker <br />~. <br />