ADAMS: LIFE HISTORY PATTERNS IN MARINE FISHES 



100 .0 



FIGURE 1.— The effect of different 

 levels of fishing mortality with constant 

 age of recruitment (4.2 yr) on yield per 

 recruit of three hypothetical fish species 

 demonstrating the range of r and K 

 selection. 



FIGURE 2.— The effect of different mean 

 ages of recruitment at constant fishing 

 mortality (F = 0.25) on yield per recruit 

 of three hypothetical fish species dem- 

 onstrating the range of r and K selec- 

 tion. 



<D 



3 

 Ll) 



a: 



(X 

 LU 

 CL 



> 



0.00 .25 .50 .75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 



FISHING HDRTPLITY (Fl 



200 .0 



175 .0 



— 150.0 

 125.0 



° SPECIES 

 ' SPECIES B 

 o SPECIES C 



4.0 B.O 12.0 16.0 20.0 24.0 2B.0 32.0 36.0 



OGE AT FIRST RECRUITMENT 



selected species than for the r selected species. The 

 K selected species is reduced to levels lower than 



the maximum sustainable yield by overfishing 

 much more rapidly than the r selected species. 



