Kaštela Bay central Adriatic Sea Latitude:   43.5460     Longitude:   16.2850 Associated Investigators: Mladen Solic , Nada Krstulovic ,   Danijela Santic ,   Stefanija Sestanovic   Related Time Series: [ Kaštela Bay ]   [ Stončica ]   Kaštela Bay, with a surface area of 61 km2 (15 km long and 6 km wide) and an average depth of 23 m communicates with the adjacent channel through an inlet 1.8 km wide and 40 m deep. The river Jadro, which discharges into the eastern part of the bay, is the most important fresh-water source, with an average annual inflow of 10 m3 s-1. Wide oscillations of chemical and physical parameters in this area are the result of strong land influence. Water circulation in the bay is generated mostly by the local wind, which is related to the passage of mid-latitude cyclones over the area. The average water renewal time is about one month, while under strong wind conditions it can be as short as five days. During the warm period of the year (July to September) wind forcing is relatively weak and the freshwater inflow low, due to which the renewal time is rather long. Bacteria and heterotrophic nanoplankton (HNAN) were enumerated by epifluorescence microscopy at a magnification of x1000, using the standard DAPI staining technique (Porter & Feig 1980). Bacterial cell production was measured from DNA synthesis based on incorporation rates of 3H-thymidine (Fuhrman & Azam, 1982).