p. 133 - 143

RELATIVE NUMERIC IMPORTANCE OF TWO DIFFERENT SOFT-BOTTOM BENTHIC
GROUPS (MOLLUSCS AND CRUSTACEANS) IN THE SOUTHERN BLACK SEA


E. Mutlu and M. Unsal

Institute of Marine Sciences, Erdemli, ICEL, Turkey

Abstract
Single bulk sediments were separately collected with a Van Veen grab
from 20 stations along the Turkish coast of the Black Sea in 
September 1988 and in January 1989. The numeric indices converted 
from these samples pronounced that molluscs and crustaceans were
distributed in the equal frequency of occurrence while molluscs
contributed highly much biomass (99%) and abundance (69%), mainly
with a few certain species such as Modiolus phaseolinus, Mytilus  
galloprovincialis. Crustaceans were considered to be relatively
contributors (0.1% biomass, 30% abundance), with small size organisms
such as Synisoma capito, Iphinoe elisae and Cythereis antiquata.