194
Crustacea and Molluscs
Blue Hill Falls
Sears Island
Cape Newagen
Bailey Island
Portland
Cape Ann
Boston
Plymount
Cape Cod
Sakonnet
Block Island
Millstone
New Haven
Manhasset Neck
Herod Point
Fire Island
Great Gull Island
Rockaway Point
Atlantic City
Cape May
Cape Henlopen
Assateague
Cape Charles
Lynnhaven Bay
Wachapreague
Hatteras Island
Beaufort
Cape Fear
Sapelo Island
Savannah River
Charleston
SI. Augustine
ex 0
>CO.
o
• >CO
,.0
,.0
III
•
o
x.
xc.
x De
xo.
.0
"0
x
o
•
x
•
o
•
o
•
.x
o
x
• Year 1
x Year 2
o Year 3
o
x
I
I
I
I
i
I
I
I
I
I
o 2 4 6 8 10 12 14 16 18
Pb in ppm, dry weight
Fig. 8.6
Lead contents in mussels taken from u.s. East Coast stations going from Blue Hills
Falls, Maine, south to St Augustine, Florida (from [564]).
first three are located in the vicinity of major urban sewer outfalls, and the elevated
levels of silver and lead are not unexpected. However, the Santa Catalina station is
located well offshore (40 km across the sea) and the high values there are puzzling. In
comparison with their west coast counterparts, the east coast mussels had consistently
low silver levels. This may relate to lower levels of silver in the waters, to different