FISHERY BULLETIN: VOL. 73, NO. 4 



'Based on two observations. 

 2Based partly on interpolation. 



'Based on two observations. 

 ^Reconstruction interval. 

 3Based partly on interpolation. 



These values were used in applying Equations (7) 

 and (8) to data from the exploited test populations 

 (Table 11). Curves for the test populations (Figure 



13) followed the general trend of the hiomass 

 levels, even though oscillatory deviations were 

 great. 



50-1 



40- 



30 



< 20 



s 



10 



3-WEEK PERIODS 



Figure 12. -Fitting of simulation model to control populations. 

 Dots are for guppy, triangles for swordtail. Solid lines are fitted 

 curves. 



30 

 3-WEEK PERIODS 



Figure 13.-Fitting of simulation model for test populations. 

 Dots are for guppy, triangles for swordtail. Solid lines are fitted 

 curves. 



884 



