Laserfiche WebLink
Table 7. Mean difference between temperature at the location of captured or <br />radio-tagged Colorado squawfish and the adjacent main river channel. <br />Temperatures at locations were first averaged for individual fish; these <br />means were averaged by month. n = number of fish. <br />Month <br />1986 1987 <br />Temp diff Temp diff <br />(X of X) n (X Of X) <br />n <br />JAN - (0) 0.0 (3) <br />FEB - (0) 1.2 (1) <br />MAR - (0) 0.7 (3) <br />APR - (0) 2.9 (3) <br />MAY 0.4 (6) 2.1 (4) <br />JUN 4.7 (9) 1.8 (7) <br />JUL 0.2 (3) 0.2 (7) <br />AUG 0.7 (3) 0.2 (9) <br />SEP 0.4 (3) 0.0 (8) <br />OCT 0.0 (1) 0.0 (7) <br />NOV - (0) - (0) <br />DEC 0.0 (3) - (0) <br />Water clarity in the 15-mile reach may also be a problem for native fishes <br />because of the introduction of sight-feeding predator fishes to the system. <br />Clear water during summer may increase the vulnerability of young squawfish <br />and razorbacks to such predation. Moreover, low flows in summer reduce the <br />amount of backwater habitat and concentrate young fish, thus making them <br />even more vulnerable to predation from piscivorous birds and fish. <br /> <br />27