DeMartmr Potential of fishery reserves for managing Pacific coral reef fishes 



421 



Figure 3 



Relative changes in spawning stock 

 biomass per recruit iSSB/R) as a 

 function of refuge size (/?,) compared 

 at fishing mortality rates (F, ) equal 

 to natural mortality rates (M) of 

 0.5 M, M, and 2M. among a range of 

 possible fundamental transfer rates 

 (T,J for (Al damselfish (in grams), 

 (Bl surgeonfish (in grams!, and (C) 

 the jack (in kilogramsl. SSB/R val- 

 ues are standardized by the respec- 

 tive virgin biomass value that would 

 accrue if no fishing were allowed in 

 areas 1 and 2. 



EC 



D 50 



I 



C 



? 40 



s 



30 



I 



°- 20 



60 



«L 50 

 03 



in 

 in 



.£ 40 

 01 



s 20 



a. 



60 



m 



5 



F, = 0.75 



B 



F r = 0.5 



F„ = 1.0 



F r = 2 ' 



0.0 



F, = 0.1 



F„ = 0.4 



0.0 



DAMSELFISH 



0.5 



o.ooi 0-01 



SURGEONFISH 



1 0.2 



0.4 



0.10 0.25 



JACK 



0.1 



0.2 0.3 



R, 



