TABLE 2.

Viral abundance, bacterial abundance, virus-to-bacterium abundance ratio, bacterial biomass, exoenzymatic activities (glucosidase, aminopeptidase, and alkaline phosphatase activities and ratio of aminopeptidase activity to phosphatase activity), and bacterial C production in surface coastal and offshore waters of the Adriatic Sea^a

Stations	No. of bacteria (108 cells liter−1)	No. of viruses (108 particles liter−1)	Virus-to- bacterium ratio	Bacterial biomass (μg of C liter−1)	β-Glucosidase activity (nmol liter−1 h−1)	Aminopeptidase activity (nmol liter−1 h−1)	Phosphatase activity (nmol liter−1 h−1)	Ratio of aminopeptidase activity to phosphatase activity	Bacterial C production (mg of C liter−1 h−1)
Coastal	1.61 ± 0.00	2.97 ± 3.28	3.26 ± 0.42	20.65 ± 1.75	0.45 ± 0.05	40.29 ± 4.81	12.50 ± 1.06	4.66 ± 0.48	0.07 ± 0.00
Open sea	1.31 ± 0.17	3.35 ± 4.9	6.44 ± 1.07	18.65 ± 1.58	0.63 ± 0.11	9.17 ± 0.90	7.12 ± 0.71	2.53 ± 0.33	0.03 ± 0.00

^aThe values are means ± standard errors.