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
Recruitment in the reach below the LCR can be accounted for solely by immigrants from upstream sources (little to no local recruitment at the LCR)
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.
Nutrient limitation is hypothesized as being the “BIG HAMMER” to the riverine ecosystem, which needs to be evaluated in greater detail in future research.
