у t — Т " 



HARENGULA ATHERINA CASPIALOSA JUV. 



T7ZT 



I C. BRASCH SAPOS 



С KESSLERI 



CASPIALOSA CASPIA С. с VOLGENSIS 



* t t 



| juv |luciopercalu volgensTs] 



RUTILUS RUTILUS V CASPICUS 



I ♦ 



f t T t 1 



VERMES 



insecta| MOLLUSC 

 (freshwater) 



MALACOSTRACA 



Jac.guldenst 



t t tt 



ACSTELLATUS 



H HUSO H ) 



DREISSENSIDAE 



CHIRONOM 

 I (SEA> 



Fig. 296. Diagram of the feeding of the main Caspian Sea fish (Tchugunov, 1928). 



Fig. 297. Diagram of the feeding series of 

 Caspian planktophages (Behning, 1938, with 

 some additions). 1 Pike perch, starred sturgeon ; 

 2 Seal ; 3 Herring predators (C. braschnikovi) ; 



4 'Peaceful' herring (C caspia, Clupeonella) ; 



5 Large crustaceans (Pericardia); 6 Small 

 crustaceans (Calanipeda) ; 7 Small zooplank- 



ton ; 8 Phytoplankton. 



