RMRHJX43–. Biology of the seas of the U.S.S.R. Marine biology -- Soviet Union; Hydrology -- Soviet Union. THE SEA OF AZOV 509 others an increase in the number of specimens with a decrease of biomass is observed during the summer; this is either caused by replacement of the older age groups by the young, or is the result of a reduction of density and bio- mass. The Corbulomya maeotica biocoenosis—This biocoenosis is adapted mainly to depths of 1 to 6 m off the coasts. It reaches its maximum at depths of 2 to 4 m on pure sand with shell gravel or on slightly silty sand. In the spring it occupies an area
RFD8HMP0–Black-Sea Turbot, Kalkan (Psetta maetica, Scophthalmus maeoticus) Black Sea, Crimea, Ukraine, Eastern Europe
RMRHJXGD–. Biology of the seas of the U.S.S.R. Marine biology -- Soviet Union; Hydrology -- Soviet Union. THE BLACK SEA 459 of bullheads (among them Mesogobius batrachocephalus, M. gymnotrachelus, Neogobius rata, N. platyrostris, N. syrman). Krotov (1949) traces a connection with later immigrants from the Caspian Sea: the Acipenseridae (Huso huso, Acipenser guldenstradti, A. stellatus, A. nudiventris and A. ruthenus), Clupeidae (Caspialosa kessleri pontica, ? brashnikovi maeotica, ? caspia nordmanni, ?. ?. tanaica, ?. ?. paleostomi), salmon (Salmo trutta labrax), Benthophilus Benthophilus macrocephali
RFD8HMTA–Black-Sea Turbot, Kalkan (Psetta maetica, Scophthalmus maeoticus) Black Sea, Crimea, Ukraine, Eastern Europe
RF2RA91XM–Rock reef covered with green algae Sea Lettuces (Ulva maeotica) in Black sea, Odessa, Ukraine
RFGHAAEA–Nemopsis dofleini, Spirocodon saltato ( Octophialucium sp) Sea of Japan, Far East
RMRHJX5P–. Biology of the seas of the U.S.S.R. Marine biology -- Soviet Union; Hydrology -- Soviet Union. 496 BIOLOGY OF THE SEAS OF THE U.S.S.R.. 9. SYNDESMYA OVATA 10. POLYCHAETA NEPHTHYS HOMBERGl" II. MOLUSC HYDROBIA VENTROSA 1. PONTOGAMMARUS MOEOTICUS 2. BEDS OF ZOSTERA MARINA 3. MYTILASTER LINEATUS 4. NEREIS SUCCINEA 5. A STONE WITH BALANUS IMPROVISUS 12. BRACHINOTUS LUKASI 6. CARDIUM EDULE 13. OSTROUMOVIA 7. NEREIS DIVERSICOLOR M. BLACKFORDIA 15. GOLDEN SHINER 8. CARBULOMYA MAEOTICA 16. PIKE PERCH 17. ANCHOVY 18. CLUPEONELLA 19. STURGEON 20. STARRED STURGEON Fig. 237. Character of the distri