. Biology of the seas of the Marine biology -- Soviet Union; Hydrology -- Soviet Union. 496 BIOLOGY OF THE SEAS OF THE 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
. Biology of the seas of the Marine biology -- Soviet Union; Hydrology -- Soviet Union. 496 BIOLOGY OF THE SEAS OF THE 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 distribution of the main forms of the Sea of Azov fauna (Zenkevitch). considerably richer Black Sea fauna, which in its turn is a selected fauna from the Mediterranean. In spite of this, a certain number of Mediterranean forms find in the Sea of Azov conditions exceptionally favourable for their development and form huge accumulations. As a result, the communities of the Sea of Azov are often characterized by their large biomass and by their high productivity indices and, at the same time, by the extreme poverty of their qualitative composition (oligo-mixed communities). Of the 137 species of benthos only 30 species are found more or less frequently. Table 203 No. of No. of Group species and sub-species Group species and sub-species Porifera Coelenterata Turbellaria 1 7 4 Copepoda Cirripedia Ostracoda 30 2 3 Nemertini Polychaeta Oligochaeta Hirudinea Bryozoa Rotatoria Gastropoda Lammellibranchiata 1 35 6 2 2 14 15 19 Amphipoda Mysidacea Cumacea Isopoda Decapoda Chaetognatha Tunicata Pisces 29 11 10 3 8 1 1 79 Cladocera 9 Total 292. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Zenkevich, L. A. (Lev Aleksandrovich), 1889-1970. New York, Interscience Publishers
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