536 CYCLES OF ORGANIC AND INORGANIC SUBSTANCES 



places for hypotheses about the relations between the fish and 

 the basis of their food supply. 



I realize that in this paper I have concentrated more on the 

 problems than on the achievements in this field and have said too 

 little about our general understanding of production in different 

 seas. This is the necessary background for our present concern 

 with detail and with particular anomalies in methods which have 

 been generally successful. Also, in the prol)lems I have mentioned, 

 I have unduly stressed those involving the quantitative analysis 

 of data at the expense of more biological questions. Particularly, 

 I have neglected the difiiculties of studying the plants in terms 

 of the individual species that make up the populations we think of 

 as chlorophyll or carbon. I do not think this is entirely a personal 

 bias and I feel that the recombination of these two aspects will 

 be a necessary and most clifticult future problem. 



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Beklemishev, K. V. 1957. Superfluous feeding of the zooplankton and 

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