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Using Shellfish Population Field Surveys to Inform Management Decisions. Quonochontaug Pond, RI. Donor Site. Transplant Site. Ninigret Pond. Ninigret Pond. Constas et al. 1980. Estimated Quahog Population = 5,241,309 Average Pond-wide Density = 1.12 clams/m 2. - PowerPoint PPT Presentation
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Using Shellfish Population Field Surveys to Inform Management Decisions
Quonochontaug Pond, RI
Donor Site
Transplant Site
Ninigret Pond
Ninigret Pond
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Constas et al. 1980
n = 126
SUBLEGAL 69.8% LEGAL 30.2%
LITTLENECKS78.9%
CHERRYSTONES18.4%
CHOWDERS2.6%
47 mm 72 mm 88 mm
SHELL LENGTH (mm)
FR
EQ
UE
NC
Y
The Nature Conservancy 2010
LENGTH FREQUENCY OF QUAHOGS IN NINIGRET POND
Estimated Quahog Population =
5,241,309
Average Pond-wide Density =
1.12 clams/m2
Estimated Quahog Population =
3,316,412
Average Pond-wide Density =
0.98 clams/m2
STRATA0.0
2.0
4.0
6.0
8.0
Structure/EastStructure/CentralSand/EastStructure/WestSand/WestSand/CentralMuck/WestMuck/EastMuck/Central
DENSITY/m2
QUAHOG DENSITY BY SUBSTRATE
Constas et al. 1980 The Nature Conservancy 2010
DISCUSION OF MANAGEMENT IMPLICATIONS
Questions?
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