Table of contents

Bird Predation on Juvenile Salmonids of the Yakima River

Does avian predation constrain salmon restoration on the Yakima River? How many smolts are consumed by birds?

River Reach Surveys:

Hotspot Surveys

Chandler Fish Bypass

Horn Rapids Dam

Smolt Acclimation Site Surveys (3 spring chinook, 4 coho)

Reach Survey Results: Upper River

Middle River

Lower River

River Reach Model:

River Reach Model:

Challenges to river reach model assumptions:

Smolt Acclimation Site Survey results:

Hotspot Survey results:

Gull Consumption estimates:

Pelican Consumption estimates at Chandler:

What would these pelican consumption estimates equate to?

Challenges to assumptions of high pelican consumption estimates:

Smolt – Pelican count correlations

Slide 21

Smolt – Gull count correlations

Slide 23

Conclusions

M/E activities for 2006-2007:

Acknowledgements: