P-154 Giving Fish More Energy without Giving Them More Food: Can Streambed Topography Influence a Fish's Net Rate of Energy Intake?
We use a model developed by Hayes et al. (2007) to predict NREI in a headwater stream in Southeastern Washington. Next, we manipulate the three-dimensional (x,y,z) points of the streambed topography survey to be consistent with future planned restoration actions including addition of large woody debris and a corresponding increase in the number of pools. After the manipulation, we again model NREI and note differences between the two scenarios. Results suggest channel structure can influence potential NREI for fish even when food and temperature are held constant. We suggest example analyses based on differencing predicted NREI surfaces as a means to assess how physical changes to channel structure directly pertain to fish.