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<br /> 180 26 <br /> 160 1981 I <br /> I ,'..~'.. ' ,,'~ , <br />.....140 I ",,' 20 <br />0 <br />~120 n.7 I : <br />E ,_k '" , 15 () <br />~100 1'" <br /> . - , . . 1 0 <br />(!) , . . 1 ~ <br />'" 80 . ~ <br />~ .: I 10 <br /> 1 >- <br />() 60 I, " <br />~ "," 1 <br />is 40 T " 1 5 <br /> 1 <br /> 20 I <br /> 0 I 0 <br /> Al'RI. IMY ..... J"-Y <br /> <br /> <br /> 400 1983 <br /> 360 <br />~ 300 n .7 <br />.. <br />.s 250 <br />w <br />~ 200 . " <br /><( '.' <br />G 150 .. <br />~ , <br />is 100 T , <br /> , . <br /> 60 .' <br /> Q <br /> 0 <br /> <br /> <br /> <br />..... <br /> <br /> 25 <br />.. : 20 <br />,',' <br />.,,' <br /> 15 ~ <br /> ~ <br /> 10 ~ <br /> >- <br /> 5 <br /> 0 <br />MY <br /> 26 <br /> 20 <br />.,-' <br />" 150U <br /> ~ <br /> 10 ~ <br /> >- <br /> 5 <br /> 0 <br />.....Y <br /> <br /> A_ <br /> 300 <br /> 1982 <br /> 250 <br />.. n . 5 <br />... <br />1200 <br />w <br />~ 150 <br /><( <br />x <br />0100 <br />0 <br />is <br /> 60 Q <br /> 0 <br /> Al'RI. <br /> 300 <br /> 1988 <br /> 260 <br />~ <br />0 n . 5 <br />... <br />1200 <br />w <br />~ 150 <br />0( <br />x <br />() 100 <br />~ <br />is <br /> 60 <br /> Q <br /> 0 <br /> APRl. <br /> <br />MAY <br /> <br /> <br />,1.' ~, <br />" "I <br />1 <br />1 <br />1 <br />1 <br />[ <br />1 <br /> <br />MAV ,Jl,.JNi <br /> <br /> <br /> 1 25 <br /> I . <br /> I .' ,~ .-.' <br /> I, ,., ,'.'.' 20 <br /> " <br /> ."1 15~ <br /> [ <br />- 1 .. <br />. 10 ~ <br />, 1 <br /> >- <br /> 5 <br /> 0 <br />IMY ...... MY <br /> <br /> <br />MONTH <br /> <br />Fig. 7. Relation between discharge, temperature, and initiation of spawning migration for Colorado squawfish, Yampa River, <br />1981-83 and 1988. Q = average daily discharge: T = average daily temperature (USGS records, Yampa River near Maybell, <br />Colorado). Solid vertical lines = dates first and last radio-tagged fish exhibited movement to spawning ground; dashed l'el1ical <br />line;;;: average date radio-tagged fish exhibited migratory movements; n = number of radio-tagged fish. <br /> <br />8 <br />