Akademik Veri Yönetim Sistemi
ECOLOGICAL CHANGES IN THE SEA OF MARMARA, Melek İşinibilir,Ahmet E. Kıdeyş,Alenka Malej, Editör, Istanbul University Press, İstanbul, ss.721-742, 2024
Present study deals with the species compositions of trawl haulings performed between December 2014 and
September in the eastern part of the Sea of Marmara. As a result of 177 trawl operations, totally 88 species belonging
to 7 taxonomic groups were encountered. Osteichthyes were represented by 42 species, Chondrichthyes by 11
species, Crustacea by 12 species, Echinodermata by 8 species, Cnidaria by 5 species, Mollusca by 6 species, Tunicata
by 4 species. For all the studied period, the occurence incidance was 100% for the species Serranus hepatus and
Trachurus sp. Among the species, Brissopsis lyrifera (46.6% of all specimens), Parapenaeus longirostris (14.9%),
Trachurus sp. (29.5%) and Serranus hepatus (1.9%) were the most dominant species. Maximum species richness,
diversity and evenness index values were estimated in the winter periods, whereas the minimum values were
determined in spring and summer seasons. SIMPER results indicated an intermediate level of similarity between
north and south samples (62.35% and 47.29% for south and north) corresponding to each region group and between
group dissimilarities were 51.43%.