CONTENTS 



Page 



Introduction 301 



Determining relative smolt abundance 302 



Fyke-net design 302 



Fyke-net site - 303 



Fyke-netting procedure — 304 



Fishing season _- — ^ 304 



Daily fishing period — — 305 



River conditions and fyke-net efficiency 305 



Water velocity 305 



Channel changes - 306 



Water depth -._ _ _ 306 



Debris 306 



Determining smolt age 307 



Sampling procedure 307 



Length-frequency samples 307 



Scale samples 308 



Abundance of smolts — 308 



Timing of migration 309 



Hourly index catches 309 



24-Hour fishing 310 



Smolt catches at adjacent net sites 310 



Smolt catches at distant net sites.— 311 



Age composition of smolts - 311 



Smolt sizes at adjacent net sites ._ 312 



Smolt sizes at distant net sites _ 313 



Verification of fresh-water age.. 313 



Summary _ 314 



Literature cited 315 



Appendix _ _ 316 



III 



