Difference between revisions of "Natal Origins Project (NO)"
From Glen Canyon Dam AMP
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*There is a low probability for an individual fish to move large distances. | *There is a low probability for an individual fish to move large distances. | ||
*Abundance is a key factor: the more fish upstream in the Lees Ferry reach = more fish will move downstream | *Abundance is a key factor: the more fish upstream in the Lees Ferry reach = more fish will move downstream | ||
| − | *Recruitment in the reach below the LCR can be accounted for solely by immigrants from upstream sources | + | *Recruitment in the reach below the LCR can be accounted for solely by immigrants from upstream sources |
*Food limitation lead to the collapse in the trout population, and by extension also likely happened in the downstream reaches. | *Food limitation lead to the collapse in the trout population, and by extension also likely happened in the downstream reaches. | ||
*Inflow hydrology and reservoir limnology likely govern the quality and quantity of nutrients supplied to the downstream river segments. | *Inflow hydrology and reservoir limnology likely govern the quality and quantity of nutrients supplied to the downstream river segments. | ||
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[[File:NatalOriginsSamplingDesign_(1).jpg|center|700px]] | [[File:NatalOriginsSamplingDesign_(1).jpg|center|700px]] | ||
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| + | '''Local recruitment in Marble Canyon down to the LCR''' | ||
| + | There does appear to be some local trout recruitment in Marble Canyon down to the LCR but the numbers of fish at in the reach below the LCR can be accounted for solely by immigrants from upstream sources. [https://www.usbr.gov/uc/rm/amp/twg/mtgs/14oct28/Attach_12.pdf] [https://www.usbr.gov/uc/rm/amp/twg/mtgs/17jan26/AR16_Yard.pdf] | ||
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Revision as of 08:11, 27 April 2017
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