Invasive Asian Clams Corbicula fluminea in Dudley Pond, Wayland, MA A Report to Mike Lowery Wayland Surface Water Quality Committee By Watershed Planning Program Division of Watershed Management Massachusetts Department of Environmental Protection
Clams from Dudley Pond
Abundance Individuals/square foot Individuals/square meter
Site #1 144 1,548
Site #2 24 258
The abundance data show that the clam density is high but they are not evenly distributed in the lake
Size of Clams Site #1
Site #2
Mean Length (mm)
16.26
20.14
Standard Error (mm)
0.60
1.17
Maximum (mm)
23.11
24.10
Minimum (mm)
10.42
17.01
Clam 2-D Analysis Clam shell height (mm)
25 20 15 Site #1
10
Site #2
5 0 0
10 20 Clam shell length (mm)
30
Size Distribution of the Clam Population
Frequency
20
15 10 5
0
Clam shell length (mm) • This graph tells that there is a healthy and sustainable Corbicula population in Dudley Pond, Wayland
Appendix I: Clams Shells in the Lake
From Mike Lowery
Appendix II: Dudley Pond Bathymetric Map
From Mike Lowery