TABLE 1.

Composition of Chesapeake Bay virioplankton according to molecular size of the virus genome

Cruise date	Molecular size region (kb)	% of total virioplankton at station:
		908	858	845	818	744	724
August 1995	>242.5
	197–242.5		0.4	1.6	3.0	2.5	2.2
	145.5–194		1.5	1.9	2.7	1.9	2.5
	97–145.5					0.3	0.2
	48.5–97		16.3	24.0	28.5	28.5	29.8
	23–48.5		52.4	47.7	46.1	50.3	52.1
	<23		29.5	24.8	19.7	16.5	13.2
May 1996	>242.5	0.5	0.1	0.4	0.4	0.5	0.4
	197–242.5			0.1		0.2	0.1
	145.5–194	1.7	2.0	3.9	1.5	1.5	1.2
	97–145.5
	48.5–97	34.1	30.4	26.9	22.1	18.0	20.4
	23–48.5	61.2	64.7	64.2	74.1	78.0	76.1
	<23	2.6	2.8	4.6	1.8	2.0	1.9
June 1996	>242.5	0.2	0.4	0.2	0.2	0.4	0.4
	197–242.5		0.1			0.1
	145.5–194	0.3	0.5	0.2	0.3	0.3	0.2
	97–145.5	0.6	0.1	0.6	0.8	0.8	1.3
	48.5–97	24.5	22.4	18.9	14.2	17.5	13.7
	23–48.5	74.4	76.6	80.2	84.5	81.0	84.4
	<23
July 1996	>242.5
	197–242.5	1.0	0.5	1.2	0.8	0.4	0.8
	145.5–194	1.7	0.6	0.6	0.7	1.1	0.8
	97–145.5		0.1	0.8	0.7	0.8	0.7
	48.5–97	12.4	19.0	20.2	19.2	22.3	25.1
	23–48.5	75.6	71.6	67.8	69.4	67.2	64.6
	<23	9.4	8.3	9.3	9.2	8.2	8.0