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<br />.(":) <br /> <br />t..,.> <br />~~> <br />~, <br />I'''' <br />~ <br /> <br />1. The San Juan River populations of Colorado squawfish and razorback <br />sucker, while representing a reproducing population, are in danger of <br />becoming extirpated. However. with appropriate management. the status <br />of the populations might be enhanced. <br /> <br />2. The present [historic] conditions of the San Juan River have been <br />significantly altered or impacted by the operation of Navajo Dam and <br />other man-caused impacts along the River. <br /> <br />3. There is an urgent need to collect in-depth biological, physical and <br />chemical information on the fish and their habitats, and to assess ways <br />to apply all information. <br /> <br />In addition, the biologists agreed that the following major <br />assumptions/hypotheses need to be tested in the San Juan River Basin <br />(reference): <br /> <br />1. Late spring and early summer flows are important for spawning and <br />recruitment (flow and temperature) of Colorado squawfish. <br /> <br />2. Seasonally flooded lowlands may be important for razorback sucker <br />spawning. <br /> <br />3. The abundance of native species is directly related to predation and <br />competition by non-native species. <br /> <br />4. Elimination of instream migration barriers would increase access to <br />spawning areas and decrease impacts on drifting larvae of Colorado <br />squawfish and razorback sucker. <br /> <br />5. The San Juan River, during certain hydrologic conditions, appears to <br />have suitable habitat for successful spawning, nursery and rearing of <br />native species. <br /> <br />3 <br />