# Organochlorines Accumulation in Caged Mussels
## 3 Results
### OC Accumulation  
Results in Figure 3 present temporal variations of PCBs, _p,p'_-DDTs, and OCPs in 1- and 2-year old mussels in Mali Ston Bay and the ones transplanted to KaStela Bay. PCBs are presented as the sum of ten PCB congeners (CB 28, 52, 101, 105, 118, 138, 153, 156, 180, 194), _p,p'_-DDTs are presented as the sum  
Figure 2: Biological parameters (shell length, tissue weight, lipid content— extractable organic matter (EOM) and condition index (CI)), in 1- and 2-year-old mussels from Mali Ston Bay and the ones transplanted to KaStela Bay. A—temporal variations; B—spatial variations. of \(p\),\(p^{\prime}\)-DDE, \(p\),\(p^{\prime}\)-DDT, and \(p\),\(p^{\prime}\)-DDD (\(\Sigma\)DDE, DDD and DDT), and OCPs are presented as the sum of HCB, Iindane, heptachlor, and aldirn. In Kastela Bay, the concentrations of \(p\),\(p^{\prime}\)-DDTs in 1- and 2-year-old mussels were higher than of other chlorinated pesticides analyzed. In overall, \(p\),\(p^{\prime}\)-DDTs varied from 4.37 to 9.06 ng g\({}^{-1}\)dw (CV = 22.9%) in 1-year-old mussels and from 4.47 to 8.90 ng g\({}^{-1}\)dw (CV = 19.9%) in 2-year-old mussels. The same range of HCB content (<MDL-0.38 ng g\({}^{-1}\)dw) was observed for both 1- and 2-year-old mussels, revealing higher variations in 1-year-old mussels (CV = 81.9%) than 2-year-old mussels (64.4%). The concentrations of Iindane ranged from <MDL to 0.41 ng g\({}^{-1}\)dw (CV = 80%) in 1-year-old mussels and <MDL to 0.22 ng g\({}^{-1}\)dw (CV = 71.6%) in 2-year-old mussels. Heptachlor content varied from <MDL to 0.43 ng g\({}^{-1}\)dw in 1-year-old mussels and <MDL to 0.38 ng g\({}^{-1}\)dw in 2-year-old mussels, showing variations of 75.5% and 91.0%, respectively. Aldirn concentrations varied from <MDL to 0.37 ng g\({}^{-1}\)dw in 1-year-old mussels and <MDL to 0.52 ng g\({}^{-1}\)dw in 2-year-old mussels, with CV = 72.2% and 99.5%, respectively (Figure 3). In Mali Ston Bay, the concentration of \(p\),\(p^{\prime}\)-DDTs in 1- and 2-year-old mussels varied from 2.2 to 2.9 ng g\({}^{-1}\)dw (CV = 9.7%) in 1-year-old mussels and from 1.63 to 2.69 ng g\({}^{-1}\)dw (CV = 15.8%) in  
Figure 3: Polychlorinated biphenyls (PCBs), \(p\),\(p^{\prime}\)-dichlorodiphenyltrichlorootehane (\(p\),\(p^{\prime}\)-DDTs) and organochlorine pesticides (OCPs) in 1- and 2-year-old mussels in Mali Ston Bay and the ones transplanted to Kastela Bay, expressed as temporal variations. 2-year-old mussels. Individually, DDE content varied in the narrow range from 1.37 to 1.76 ng g\({}^{-1}\)dw (CV = 10.5%) in 1-year-old mussels and from 1.01 to 1.91 ng g\({}^{-1}\)dw (CV = 21.5%) in 2-year-old mussels. DDD content varied from 0.32 to 0.80 ng g\({}^{-1}\)dw (CV = 35.0%) in 1-year-old mussels and 0.36 to 0.60 ng g\({}^{-1}\)dw (CV = 18.9%) in 2-year-old mussels. Regarding DDT content, it ranged similarly from 0.19 to 0.82 ng g\({}^{-1}\)dw (CV = 41.8%) in 1-year-old mussels and 0.19 to 0.69 ng g\({}^{-1}\)dw (CV = 45.0%) in 2-year-old mussels. The concentrations of PCBs varied similarly in the narrow range from 6.92 to 8.02 ng g\({}^{-1}\)dw (CV = 6.15%) in 1-year-old mussels and 5.5 to 8.14 ng g\({}^{-1}\)dw (CV = 6.65%) in 2-year-old mussels (Figure 3). Bimonthly monitoring of OCs among S1-S4 at Kastela Bay in transplanted 1- and 2-year-old mussels is shown in Figure 4.  
Spatial distribution pointed to some differences in the accumulation of \(p\),\(p^{\prime}\)-DDTs (Figure 4). DDTs average content prevailed at S1 in comparison to other stations, both in 1-year-old (8.8 ng g\({}^{-1}\)dw) and 2-year-old (7.2 ng g\({}^{-1}\)dw) mussels. It was to be expected because S1 is directly influenced by the Jadro River and the inflow of contaminants through wastewater discharges and agricultural activities in the past in the eastern part of the Bay. At other stations, average \(p\),\(p^{\prime}\)-DDTs concentrations in 1-year-old mussels were almost similar, revealing a decreasing order of S4 (6.8 ng g\({}^{-1}\)dw), S3 (5.4 ng g\({}^{-1}\)dw), and S2 (5.4 ng g\({}^{-1}\)dw).