Polychlorinated naphthalenes in three-spined stickleback Gasterosteus aculeatus from the gulf of Gda sk

The congener-specific data of polychlorinated naphthalenes (PCNs) are presented for the three-spined stickleback collected from four spatially distant sites in the beach zone in the south-western part of the Gulf of Gda sk, Baltic Sea. The lipid weight normalised concentration of total PCNs in stickleback ranged from 35 to 130 ng/g. Tetra-CNs (54–64%) were a dominating chloronaphthalene homologue group in sticklebacks, followed by penta- (37–44%), hexa- (0.9–1.7%), and hepta-CNs (0.02-<0.1%). The fingerprint of chloronaphthalene congeners showed the 1,2,3,5,7-/1,2,4,6,7-P5CN (Nos 52/60), 1,2,4,6-/1,2,4,7-/1,2,5,7-T4CN (Nos 33/34/37) and 1, 3, 5, 7-T4CN (No. 42) as a most contributing members, and also some compositional (%) differences. The patterns of tetra-, penta-, and hexa-CNs displayed compositional variations in a residue picture of those substances, depending on the sampling site, and implied on a specific point source of pollution, possibly due to the neighbourhood of shipyards and marine ports, as a cause o f the differences/similarities observed.