TABLE 1.

Phytoplankton biomass (as chlorophyll a) and nutrient ranges in striped bass aquaculture ponds during the 1997 grow-out period in midsummer and early winter

Analyte	Midsummer range	Early-winter range
Chlorophyll a (μg liter−1)	10–338	20–83
Urea (μM N)	0.4–9.9	0.4–3.6
Total dissolved nitrogen (μM N)	33–252	31–59
DON (μM N)	24–180	29–45
NH4+ (μM N)	0.6–71	1.6–9.4
NO3− + NO2− (μM N)	<0.03–70	0.3–4.5
PO43− (μM N)	0.04–0.72	0.11–0.45