Table 4. Results of the Plasma Vitellogenin Analysis in Males
Site/Characteristics Fall Spring
Site Land use Vitellogenin (mg/ml) ±SEM
(Range)		 Number
of
samples		 Vitellogenin (mg/ml) ±SEM
(Range)		 Number
of
samples
Annapolis Urban/suburban 0.00±0.00
(0.00 - 0.02)
20
 0.01±0.00
(0.00 - 0.07)
20
Back River Sewage treatment 0.00±0.00
(0.00 - 0.04)
20
 0.00±0.00
(0.00 - 0.03)
20
Beaverdam Creek Reference 0.00±0.00
(0.00 - 0.00)
10
 0.01±0.01
(0.00 - 0.09)
20
Choptank River Agricultural 0.00±0.00
(0.00 - 0.02)
20
 0.03±0.03
(0.00 - 0.58)
20
Fort Armistead Industrial/sewage treatment 0.01±0.00
(0.00 - 0.07)
19
 0.00±0.00
(0.00 - 0.04)
20
Point Lookout Reference 0.00±0.00
(0.00 - 0.00)
10
 0.00±0.02
(0.00 - 0.03)
10
Patapsco River Industrial/urban 0.00±0.00
(0.00 - 0.04)
20
 0.00±0.00
(0.00 - 0.03)
20

Note - no significant differences found in vitellogenin concentration between sites or seasons.