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<br />I <br /> <br />TI3JOQ <br />, <br /> <br />f. <br /> <br />.. <br /> <br />.. <br /> <br />;. <br /> <br />- <br /> <br />, <br /> <br />. <br /> <br />, <br /> <br />. , . <br />SAN JUAN RECOVERY IMPLEMENTATION PROGRAM <br />. ~ <br />J .J ~ <br /> <br />~. <br /> <br />~ <br /> <br />~ <br /> <br />r <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />-, <br /> <br />. <br /> <br />. <br /> <br />WHAT WE THINK WE KNOW <br /> <br />Changes in water temperature delay spawning by about 3 weeks and cause it to occur farther <br />downstream which likely impacts survival <br /> <br />Relatively steep river gradient increases larval drift, affects habitat usage and survival <br /> <br />I Monsoon storms increase larval drift, reduce food supply and may decrease habitat quality <br /> <br />Stocking of juvenile or larger fish seems to be somewhat successful <br /> <br />Increased riparian vegetation appears to cause the river to cut down rather than braid as it did <br />historically <br /> <br />Non-native species competition and predation are a concern and mimicking a natural hydrograph <br />has not caused significant increases in native fish nor decreases in non-natives. In fact, trends are <br />appear exactly the opposite <br /> <br />lake Powell is a sink for young endangered fish and a source for non-natives at high elevations <br /> <br />Selenium and copper concentrations require further research to determine if they cause <br />reproductive problems <br /> <br />.. <br /> <br />.. <br /> <br />.. <br /> <br />, <br />.' <br /> <br />~. <br /> <br />- <br /> <br />- <br /> <br />. <br /> <br />L <br /> <br />~ <br />\' <br /> <br />(, <br />(' <br />,-, <br />2 <br />