CONTENTS 



Page 



Introduction 1 



Methods 2 



Results 2 



Environment 2 



Species composition 4 



Areal distribution 5 



Seasonal distribution 6 



Discussion 6 



Acknowledgments 8 



Literature cited 8 



Figures 



1. Humboldt Bay, Calif., and the five sampling stations 2 



2. Sampling boat showing macroplankton sampling apparatus 3 



3. Surface ( — ) and bottom ( — ) temperatures recorded in Humboldt 



Bay during 1969 3 



4. Surface ( — ) and bottom ( — ) salinities recorded in Humboldt 



Bay during 1969 3 



5. The mean larval fish catch per cubic meter of water samples 



collected in each station during 1969 5 



6. The number of species offish larvae and juveniles collected 



in each station during 1969 6 



7. The mean fish catch per cubic meter of water sampled each 



month during 1969 6 



8. The number of species of fish larvae and juveniles captured each 



month during 1969 6 



in 



