Alosa sphaerocephala (Berg, 1913)
Description
Dorsal spines (total): 3; Dorsal soft rays (total): 13 - 14; Anal spines: 3; Anal soft rays: 17 - 19. Body shape `shad-like'; upper and lower head profiles strongly rounded. Gill rakers rather long and thin, equal to or usually longer than gill filaments. Teeth well developed in both jaws. Resembles A. saposchnikowii which has a more pointed head, the upper and lower jaw profiles straight; A. caspia has more gill rakers and A. brashnikovi is more slender and `herring-like'.
Common Names
Taxonomic Hierarchy
Kingdom: Animalia
Phylum: Chordata
Class: Teleostei
Order: Clupeiformes
Family: Alosidae
Genus: Alosa
Species: Alosa sphaerocephala (Berg, 1913)
Climate Zone
Location
Biology
Confined to semi-saline waters; non-anadromous, not entering fresh water. Spawns in the eastern part at the north end of Caspian Sea, from mid-May to end of June, mostly when temperatures are 18-20°C, salinities 8-10 ppt and at depths of around 3 m. The young move southward late in autumn, later than any other clupeids.
Habitat
pelagic