Conclusions

• Channel size, flow and temperature are key factors that determine carrying capacity for resident fish over 250 mm, and may determine which of the two ecotypes will dominate

• Data are available in the Yakima Basin to predict how carrying capacity for O. mykiss will be affected by flow, temperature, and channel morphology

• We can test how well we understand the factors driving life history of O. mykiss by:

• • Using what we understand to build a life cycle model for O. mykiss
  • Plug in actual values for habitat and environmental factors,
  • Compare how the predicted and observed distributions of the two ecotypes match