CONTENTS 



Page 



Introduction • ^ 



Olsen Bay drainage ^ 



General area 2 



Location ^ 



Climate ^ 



Intertidal study area ^ 



Streannflow "^ 



Tidal movements 4 



Salinity 4 



Gravel temperature ^ 



Gravel composition " 



Fauna ^ 



Characteristics of the spawning migration 8 



Timing 8 



Magnitude of fresh-water migration ° 



Even- year cycle (1960) 10 



Odd-year cycle (1961) 10 



Magnitude of intertidal migration 11 



Duration of intertidal stream life 14 



Separation of races 14 



Size differences 14 



Racial indications by time of spawning 16 



Racial indications by location of spawning 16 



Sex ratios 16 



Weir carcass counts, 1960 16 



Intertidal carcass counts, 1960 1*^ 



Weir carcass counts, 1961 18 



Upstream carcass counts, 1961 18 



Weir live fish counts, 1961 19 



Intertidal carcass counts, 1961 • 1^ 



Fecundity • 1^ 



Egg counts in relation to size, 1960 1° 



Egg counts in relation to size, 1961 ^0 



Egg retention, 1960 20 



Egg retention, 1961 20 



Survival of eggs and larvae 21 



Sampling procedure i • 21 



Egg deposition 21 



Survival over winter 22 



Sunnmary 2-3 



Acknowledgments 2j 



Literature cited 23 



Appendix 25 



