4.0 



35 



3.0 



2.5 



"£2.0 



E 

 1.5- 



1.0 



0.5- 



Station I 

 1969 



N 10 

 P 0.18 

 CF 72% 



Jl 



Station I 

 1970 



N_ II 

 P0.49 

 CF 69% 



Station 2 

 1970 



N 10 

 PI.63 

 CF 76% 



T 



LJ, 



M ' J ' J ' A  M ' J 'J' A I M ' j ' J ' A 

 MONTHS 



Figure 10. — Surface primary production, May to August. 

 (N = number of samples, P ^= mean surface produc- 

 tion, and CF ^ coefficient of variation — all values for 

 the period, June to August.) 



However the degree of scatter in the ecological 

 data requires some expression of confidence 

 limits. At Station 1 (1969), which was located 

 at a considerable distance from the area of fertil- 

 ization, 95 /f confidence limits for the asymptotic 

 value of 1.03 mg C/mg Chi a/hr were 0.84 and 

 1.22; for 1970 at the same station the 95% con- 

 fidence limits for the asymptotic value of 1.55 



Figure 11. — Productivity indices plotted against light 

 intensity at Station 1, 1969 and 1970, and Station 2, 1970 

 (O O computed best fitting polynomial curve). 



2.0 



1.5 



1.0 



0.5 



FISHERY BULLETIN: VOL. 70, NO. 1 

 ST. I, 1969 



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£ 



1.0 



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12.0 



10.0 

 8.0 



6.0 

 4.0 

 2.0 



ST. I, 1970 



ST. 2,1970 



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0.1 0.2 0.3 0.4 



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