April 2007

The VIMS Juvenile Fish Survey recorded Atlantic Croaker in the James, York, and Rappahannock Rivers in April 2007.  In the James River, the survey recorded adult Atlantic Croaker near Mulberry Island and downstream, and large croaker near Newport News Point.  In the York, large Atlantic Croaker (up to 14 inches) were observed at stations from Goff Point downriver.  In the Rappahannock River, large Atlantic Croaker were noted at the survey’s uppermost station near Tappahannock; other croaker in the 10-12 inch range were observed at many other stations downriver.

Weakfish were recorded in the James River near Newport News, in the York River near the Poroporotank River, and in the bay.  The survey’s first Northern Puffer of the year was recorded near the mouth of the Rappahannock River.

 Dissolved oxygen (DO) levels of greater than 5.0 mg/L are safe for most fish.  Tolerance to low levels of DO varies by species.  Fish tend to avoid waters with DO of 2.0 mg/L or less; extended exposure to levels this low prevents their bodies from functioning normally.


07 april chart