abstract: We report the first occurrence of Oithona davisae Ferrari F.D.&Orsi, 1984 in the Sinop coast, Turkey. Data on the abundance and biomass of this species, and the proportion of adult and copepodite stages in the total copepods were investigated. The zooplankton samples were collected monthly by vertical hauls with plankton net of 112 m mesh size from January to December 2009. However, O. davisae was observed for the first time in September, and continued to be observed for the remainder of the sam
journal: Turkish Journal of Fisheries and Aquatic Sciences