Albacore Commercial Fishing Effort Kernel Density Estimate of Effort 1995-2021, ODFW

Identification Information:
Citation:
Citation Information:
Title: Albacore Commercial Fishing Effort Kernel Density Estimate of Effort 1995-2021, ODFW
Geospatial Data Presentation Form: remote-sensing image
Description:
Abstract: This layer depicts the north pacific albacore tuna commercial fishing effort expressed as average number of vessel days fished per 20km block from 1995 to 2021. Data includes logbook data for all vessels that fished off the coast of Oregon.The Oregon commercial albacore tuna fishery targets albacore using hook-and line or troll gear. The fish start migrating into the waters off Oregon around the end of June, and are most commonly found in clear blue water (where the surface temp is 62 degrees or more). The best fishing is typically in July and August, but fish are still available through early October. The west coast fleet consists primarily of vessels ranging from 20-60 feet in length, with multiple permits to harvest crab, salmon, or groundfish at other times of the year. Most years, tuna fishers must travel 30 miles or more offshore to find albacore. The layer was developed using the kernel density function in ArcPro. Kernel density estimates were created using the point density spatial analyst tool. Commercial albacore logbook data were used to create points that met the following criteria:Points that intersected land were removedPoints that did not meet the rule of three unique vessels per 20km grid cell were removedThese filters removed 1% of the points for all yearscombined.These point locations were used as the population field with an output cell size of 20km and a search radius of 0.5 cells. Fishery logbook data are recorded on standardized data sheets by fishermen during their fishing operations. The logbooks are later turned over to SWFSC for data entry and processing. Because the data are recorded by many independent sources, ODFW cannot guarantee the accuracy of all logbook data.
Purpose: This layer was developed for large-scale offshore wind energy development planning off of Oregon, and should be used for that purpose only. Use for offshore wind siting or other purposes would require additional analyses of the data.
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -129.253115
East Bounding Coordinate: -124.060111
North Bounding Coordinate: 46.478840
South Bounding Coordinate: 41.836362
Keywords:
Theme:
Theme Keyword Thesaurus: None
Theme Keyword: albacore
Theme Keyword: KDE
Theme Keyword: Oregon
Theme Keyword: ODFW
Theme Keyword: commercial
Theme Keyword: logbook
Access Constraints: None
Use Constraints: This layer was developed for large-scale offshore wind energy development planning off of Oregon, and be used for that purpose only.
Point of Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: ODFW
Contact Person: Jessica Watson
Contact Position: Marine Resources Policy Project Leader
Point of Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: ODFW
Contact Person: Jessica Watson
Contact Position: Marine Resources Policy Project Leader
Contact Address:
Address Type: unknown
Address: 2040 SE Marine Science Drive
City: Newport
State or Province: Oregon
Postal Code: 97365
Contact Electronic Mail Address: jessica.l.watson@odfw.oregon.gov
Data Set Credit: If the user intends to use the data for purposes other than large-scale offshore wind energy planning, please contact: ODFW Marine Resources Program Jessica Watson Marine Resources Policy Project Leader jessica.l.watson@odfw.oregon.gov
Native Data Set Environment: Version 6.2 (Build 9200) ; Esri ArcGIS 10.8.0.12790
Spatial Data Organization Information:
Direct Spatial Reference Method: Vector
Point and Vector Object Information:
SDTS Terms Description:
SDTS Point and Vector Object Type: GT-polygon composed of chains
Point and Vector Object Count: 458
Raster Object Information:
Raster Object Type: Grid Cell
Row Count: 25
Column Count: 21
Spatial Reference Information:
Horizontal Coordinate System Definition:
Planar:
Map Projection:
Map Projection Name: WGS 1984 Web Mercator Auxiliary Sphere
Map Projection Parameters:
Other Projection’s Definition: PROJCS["WGS_1984_Web_Mercator_Auxiliary_Sphere",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator_Auxiliary_Sphere"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",0.0],PARAMETER["Auxiliary_Sphere_Type",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3857]]
Planar Coordinate Information:
Planar Coordinate Encoding Method: coordinate pair
Coordinate Representation:
Abscissa Resolution: 0.0001
Ordinate Resolution: 0.0001
Planar Distance Units: meter
Geodetic Model:
Horizontal Datum Name: D WGS 1984
Ellipsoid Name: WGS 1984
Semi-major Axis: 6378137.0
Denominator of Flattening Ratio: 298.257223563
Entity and Attribute Information:
Detailed Description:
Entity Type:
Entity Type Label: Albacore_Commercial_20km_1995_2021_ODFW
Attribute:
Attribute Label: OBJECTID
Attribute Definition: Internal feature number.
Attribute Definition Source: Esri
Attribute Domain Values:
Unrepresentable Domain: Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute Label: Shape
Attribute Definition: Feature geometry.
Attribute Definition Source: Esri
Attribute Domain Values:
Unrepresentable Domain: Coordinates defining the features.
Attribute:
Attribute Label: DN
Attribute:
Attribute Label: Shape_Length
Attribute Definition: Length of feature in internal units.
Attribute Definition Source: Esri
Attribute Domain Values:
Unrepresentable Domain: Positive real numbers that are automatically generated.
Attribute:
Attribute Label: Shape_Area
Attribute Definition: Area of feature in internal units squared.
Attribute Definition Source: Esri
Attribute Domain Values:
Unrepresentable Domain: Positive real numbers that are automatically generated.
Metadata Reference Information:
Metadata Date: 20211203
Metadata Standard Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998
Metadata Time Convention: local time