THE SEA OF AZOV 



519 



As a result of his investigations Maisky produced a chart showing the quan- 

 titative distribution of every fish throughout the Sea. A tabular summary of 

 the raw material resources for separate breeds of fish in the Sea of Azov is 

 included here. These data are of exceptional interest, since this kind of in- 

 formation has not been obtained for any other sea ; moreover, it gives much 

 more accurate estimates of commercial resources of fish than those usually 

 obtained with the aid of biostatic analysis {Table 216). 



In the following years (1936-52) according to V. Maisky's data (1955) 



mm uptosoog 



УЖ1 500-2 Hq 



5-10 kg 

 more than lOkq 



Fig. 246. Quantitative distribution of anchovy (yield of one catch of lampara) in 



the Sea of Azov in different seasons of 1933 according to the data of the census 



(Smirnov). I June-July; II September; III beginning of October. 



' a great increase in the number of commercial shoals of migratory and semi- 

 migratory fish and the reduction of the habitat of bream and Pelecus ' were 

 recorded. There were also some changes in the numbers of anchovy, Clupeo- 

 nella, Percarina and Benthophilus. The quantities of other fish changed only 

 little. 



Using the same data of direct census Maisky gives for some fish a diagram 

 of the movements of the whole Azov shoal : that of Azov Clupeonella (Clu- 

 peonella dehcatula delicatula) is given in Fig. 247. 



Although these data may not be very accurate, this is the first attempt to 

 give a general quantitative picture according to age of fish in our Seas by 

 direct calculation with quantitative collection equipment. Thus the total 

 amount of fish, as determined by direct census, must be no less than 60,000 tons. 

 The amount of benthos eaten by fish, as determined by V. P. Vorobieff from 

 the data of his direct census, is of the order of 10 or 11 million tons; this 



