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<br />~ <br /> <br />).: <br /> <br />,. <br />.\- <br /> <br />\ <br />~ <br /> <br />4. <br /> <br />will steady flows benefit non-native fish? <br /> <br />~~ <br />~ <br />';'", <br /> <br />a. A seasonal fluctuation of flows is necessary for natives <br />b. Backwater and habitat maintenance flows should be timed <br />with fish numbers. <br />c. The natural hydrograph may not need to be mimicked each <br />year. Depends on fish numbers. <br /> <br />5. Native and non-native fish balance. How will we ascertain the <br />effects under the research program? <br /> <br />Would thermal modification solve the problems? <br /> <br />a. Thermal modification would be' used as a tool for <br />management. Would not necessarily be used every year <br />b. The present hypothermal releases have contracted the <br />distribution of HBC in the mainstem. Overall <br />productivity of the mainstem has been reduced. <br />c. Rivers are not tidal systems <br />d. We will be able to increase recruitment of HBC with <br />stabilized and warmed water <br /> <br />a. <br /> <br />b. <br /> <br />c. <br /> <br />d. <br /> <br />6. <br /> <br />The monitoring program would collect the information to <br />assess. <br />A RiSk Assessment would aid in addressing this issue <br />A better understanding of fish life histories are needed <br />to address this issue <br />Cannot quantitatively address pre and post dam situations <br /> <br />,~I'" <br />'>:;' <br /> <br />.~,,: <br /> <br />.~~ <br />~!. <br />,', <br /> <br /> <br />7. Is the LCR at Carrying Capacity? <br /> <br />Unknown and requires more study to <br />Misinterpreted from March 2, 1994 meeting <br /> <br />What is the present relationship between the LCR and the <br />mainstem populations of HBC? <br /> <br />a. <br /> <br />8. <br /> <br />a. <br />b. <br /> <br />c. <br /> <br />d. <br /> <br />e. <br /> <br />f. <br /> <br />g. <br /> <br />answer. <br /> <br />~<-;; <br />l?t~ <br />,,:", <br />f\.. <br />~,; <br />~<~ <br />:;?;. <br />;,'ri. <br />-':; ~. <br /> <br />The LCR population is a "metapopulation" center. <br />Fish from mainstem spawn in the LCR <br />The LCR also supports a resident population. Fish that <br />spend their entire life history in the LCR. <br />90% of adult HBC captured in the mainstem are found <br />within 20 miles of the mouth of the LCR <br />Small numbers of HBC are scattered in the Grand canyon. <br />Most aggregations around tepid springs or habitat types <br />similar to Tapeats sandstone at mouth of LCR. <br />During August/September/October the young fish move from <br />the LCR to the mainstem <br />During interim flows the young HBC have not been <br />displaced downstream. The large 1993 year class may have <br />led to displacement, due to numbers, downstream <br /> <br />.r..c.' <br />-' <br />~ <br />lo'/'t <br /> <br />~ <br /> <br />9. Without changing temperatures, what is the goal and what would <br />we measure? <br />