I I I 



CONTENTS 



Page 



Abstract i 



1 . The purpose of this study 1 



2. Effects of fishing on the biomass parameters 2 



3. Simulation of predation of a single species population 3 



h. Simulation of constant and density dependent fishing A 



5. Formulae and initial values used in this study 5 



6. Effects of fishing on the dynamics of walleye pollock and yellowfin 

 sole biomasses when kn i f e-edge recru i tment to fishery is used, and 



fishing does not affect recruitment to juveniles 8 



7. Dynamics of walleye pollock and yellowfin biomasses under different 

 fishing intensities when fishing affects recruitment 12 



8. Cone 1 us ions 15 



9 . References 17 



