Service Description: The estimated presence/absence of Scup according to data collected by the MA Division of Marine Fisheries Resource Survey, 1978-2016

Service ItemId: 0fec21c9e45d4f729e5684fb0d28a77b

Has Versioned Data: false

Max Record Count: 1000

Supported query Formats: JSON

Supports applyEdits with GlobalIds: False

Supports Shared Templates: False

All Layers and Tables

Layers:

• Spring Scup Presence (0)

Description: Data was provided by the Massachusetts Division of Marine Fisheries (DMF). Data was collected during the bi-annual (Spring and Fall) Resource Survey from 1978-2016. DMF provided the following information for every trawl: latitude, longitude, cruise number, stratum, trawling station, set dept, date of trawl, bottom temperature, number of each specie collected in net, weight of each specie. Latitude, longitude, and number of each specie collected in net data was used to create this visual. Separate data sets were made for spring data (green) and fall data (blue). Each dataset identifies the number of Scup caught during each trawl (3781 data points in the Spring, 3450 data points in the Fall) and the location of each trawl. To effectively interpolate using Natural Neighbor and to show areas that were “Not Surveyed”, shapefile points were created along the Massachusetts border, around the Martha’s Vineyard and Nantucket border, and outside the extent of the DMF trawl. Not surveyed data points (n=311) were assigned the value, NUMi, of 0. Trawl data points where no Scup were caught received the value of 0.1 (NUMi=0.1). All other data points where Scup were caught kept their value as the number of Scup caught. Natural Neighbor Interpolation Tool was then used for all these data points according to "NUMi" category. The interpolated data can be found in "Spring Scup" and "Fall Scup" Displayed interpolated categories were created by giving "Not Surveyed" (NUMi=0, 311 data points) and "Absent" Scup (NUMi=0.1, no Scup presence), their own category. Then, remaining data points were binned into the following categories based on the aggregation behavior of the species: Absent=0 Scup Low=1-100 Scup Medium=101-500 Scup High=501-1000 Scup Very High=1000-61,925 Scup

Copyright Text: Amanda Davis and Dr. Michelle Staudinger of the Northeast Climate Science Center (NE CSC) and Brad Chase of Massachusetts Division of Marine Fisheries (MA DMF)

Spatial Reference: 102100 (3857)

Initial Extent:

XMin: -7993607.82300027
YMin: 5124308.5477401
XMax: -7693135.79069973
YMax: 5305154.71238
Spatial Reference: 102100 (3857)

Full Extent:

XMin: -7917243.4209
YMin: 5030431.0286
XMax: -7769500.1928
YMax: 5292072.6322
Spatial Reference: 102100 (3857)

Units: esriMeters

Child Resources:   Info

Supported Operations:   Query   ConvertFormat   Get Estimates