using shellfish population field surveys to inform management decisions
DESCRIPTION
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 PresentationTRANSCRIPT
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?