.,8000 
'll.II.II.II. II.II.II 
1920 1930 1940 1950 1960 1970 1980 
Y*«r 
Fig. 6A. Fluctuations in the 5-year running average of (1) regulated 
combined river inflow to the Sea of Azov and commercial catch of 
anadromous fish (2) Russian sturgeon ( Acipenser guldenstadti ), Beluga 
(Huso huso L.) and sevruga ( Acipenser stellatus Palas), (3) Kerch (Black 
Sea) shad ( Alosa kessleri pontica ). 
°a 
CO 
o 
6.2 
E 
4c 
jc 
& 
X 
U) 
12 £ 
c 
4 
0 
Fig. 6B -population explosion of the marine jellyfish ( Aurelia ) inside 
the formerly brackish Sea of Azov as a result of increased freshwater 
diversions and the resulting rise in salinity concentrations. (1) Annual 
average salinity, (2) combined average annual freshwater diversions 
expressed as a percentage of the natural runoff to the Sea of Azov, (5) 
raw weight of jellyfish (Aurelia aurita and Rhizostom a) in millions of 
tonnes, (6) combined number of jellyfish in billions. 
49 
Tonnes 
