Northern Shrimp Survey
ArcGIS Feature Service
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InPort Metadata
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Description
The Northern Shrimp Survey was initiated in 1983 by the Atlantic States Marine Fisheries Commission (ASMFC) and monitors the relative abundance (number of shrimp), biomass (weight of shrimp), and composition of the northern shrimp stock throughout the Gulf of Maine. The data give an understanding of year class strength and sex stage and maturity of shrimp in the population. The survey focuses its efforts in offshore waters (in depths greater than 50 fathoms) and is timed to sample both males and females during the summer when they are expected to be offshore. The data it collects forms the basis of the annual northern shrimp assessment, which in turn, is used by fishery managers from Maine, New Hampshire and Massachusetts to set each year’s fishing regulations.
Spatial Extent
Layers
| id | name | type | geometryType |
|---|---|---|---|
| 0 | SMIT_SHRIMP_STRATA | Feature Layer | esriGeometryPolygon |
Fields
SMIT_SHRIMP_STRATA
| name | alias | description | dataType |
|---|---|---|---|
| OID | OID | Original object ID | esriFieldTypeBigInteger |
| SURVEY_NAME | Survey name | Name of NEFSC scientific survey | esriFieldTypeString |
| SHRIMPST_1 | Shrimp ID | Shrimp ID number | esriFieldTypeDouble |
| STRATUMA | Stratum | A predefined area where a net dredge, or other piece of gear was deployed. Code consists of 2 parts: Stratum group code number (2 bytes) and stratum number (3 bytes). Stratum group refers to if area fished is inshore or offshore North or South of Cape Hatteras or the type of cruise (shellfish, State of MA, offshore deepwater). The stratum number (third and fourth digits of code) refers to area defined by depth zone. See SVDBS.SVMSTRATA. The fifth digit of the code increases the length of the stratum number for revised strata after the Hague Line was established. | esriFieldTypeString |
| STRA_ACRES | Area (acres) | Area of strata in acres | esriFieldTypeDouble |