THE CASPIAN SEA 627 



Table 267 



Percentage dry weight 

 Form Protein Fat Ash 



Caspian 

 Didacna trigonoides 

 D. barbot-de-marnyi 

 Adacna minima 

 A. laeviuscula 

 A. plicata 

 Dreissena polymorpha 



Mediterranean 

 Cardium edide 

 Mytilaster lineatus 

 Syndesmya ovata 



Average for all the Caspian mol- 

 luscs (except Syndesmya) 1016 1-23 83-05 



Food indices of worms (and insect larvae) are even higher than those of the 

 crustaceans. Nereis, acclimatized in the Caspian Sea, has the most favourable 

 food indices {Table 269). 



Fish 



The Caspian Sea fish, according to A. Derzhavin, include 78 species {Table 



270). 



The last four families in Table 270, which includes two species of grey 



Table 268 



