Laserfiche WebLink
n <br />u <br />rare fishes move up from the Green River where they are maintaining <br />reproducing populations. They are most abundant in the portions of the <br />tributaries nearest the main river. <br />Colorado aquawfish apparently move considerable distances up the <br />tributaries. The reason for the movement is not known, although <br />sufficient information is available to remove spawning from the list of <br />possible reasons, as Colorado squawfish spawn in the mainstem Green " <br />River (Holden and Stalnaker, 1975a and b; Holden, 1977; Carlson, et al, <br />1979; Holden and Crist, 1978). The large number of juvenile suckers <br />found in the White River during our study, more than are found <br />proportionately in the Green River (Holden and Crist, 1978), suggest <br />• that this natural prey base may be a reason for the piscivorous <br />aquawfish's movements into the tributaries. <br />The benthic macroinvertebrates collected are generally associated with <br />natural stream systems that have regular, turbid spring floods. They <br />also are indicative of a relatively normal or unstressed community. <br />Table II .G-10 compares our findings with the most common forms found by <br />other xorkers in the same general area of the White River. Our findings <br />are in close agreement with the other studies although quantitative <br />comparison is not possible due to differences in sampling techniques. <br />r 1 <br />U <br />II .G-27 <br />