Indicators CURRENT

URL Access CURRENT

Data for Aleutian Islands Sample Locations 1991 to 2022 was downloaded from https://www.fisheries.noaa.gov/alaska/commercial-fishing/alaska-groundfish-bottom-trawl-survey-data

Data for Eastern Bering Sea Sample Locations 1985 to 2022 was downloaded from https://www.fisheries.noaa.gov/alaska/commercial-fishing/alaska-groundfish-bottom-trawl-survey-data

Data for Eastern and Northern Bering Sea Sample Locations 2010 to 2022 was downloaded from https://www.fisheries.noaa.gov/alaska/commercial-fishing/alaska-groundfish-bottom-trawl-survey-data

Data for Gulf of Alaska Sample Locations 1993 to 2021 was downloaded from https://www.fisheries.noaa.gov/alaska/commercial-fishing/alaska-groundfish-bottom-trawl-survey-data

Data for Northern Bering Sea Sample Locations 2010 to 2022 was downloaded from https://www.fisheries.noaa.gov/alaska/commercial-fishing/alaska-groundfish-bottom-trawl-survey-data

Data for Gulf of Mexico Sample Locations 2008 to 2022 was downloaded from https://seamap.gsmfc.org/

Data for Northeast US Fall Sample Locations 1974 to 2022 was downloaded from: https://inport.nmfs.noaa.gov/inport/item/22560, For Spring data: https://inport.nmfs.noaa.gov/inport/item/22561, POC: Paul Kostovick (or Sean Lucey)

Data for Northeast US Spring Sample Locations 1974 to 2022 was downloaded from: https://inport.nmfs.noaa.gov/inport/item/22560, For Spring data: https://inport.nmfs.noaa.gov/inport/item/22561, POC: Paul Kostovick (or Sean Lucey)

Data for West Coast Annual Sample Locations 2003 to 2022 was downloaded from: https://www.fisheries.noaa.gov/inport/item/18418

Data for West Coast Triennial Sample Locations 1977 to 2004 was downloaded from: https://www.fisheries.noaa.gov/inport/item/18418

Data for Hawai'i Islands Sample Locations 2016 to 2021 provided by PIFSC BFISH survey, See InPort record for the survey data at https://www.fisheries.noaa.gov/inport/item/20969

Data for Southeast US Summer Sample Locations 1989 to 2017 was downloaded from https://www2.dnr.sc.gov/seamap/Account/LogOn?ReturnUrl=%2fseamap%2fReports

Data for Southeast US Spring Sample Locations 1989 to 2017 was downloaded from https://www2.dnr.sc.gov/seamap/Account/LogOn?ReturnUrl=%2fseamap%2fReports

Data for Southeast US Fall Sample Locations 1989 to 2017 was downloaded from https://www2.dnr.sc.gov/seamap/Account/LogOn?ReturnUrl=%2fseamap%2fReports

The data was downloaded from the above sources as raw survey data. Please refer to the original source for detailed metadata information on each survey.

The raw survey data was then processed using an R script, which combined the individual files collected for each regional survey into one dataset with standardized names and units across all regions, and removing unnecessary columns. During this processing step, decisions where made to in some cases trim a regions data to either eliminate certain years or strata based on evaluation of survey coverage for those years or strata.

Process step for Hawaii Island data

The processed data was then fed into a Python script to generate the interpolated biomass distribution maps. These maps were then uploaded to the NOAA Geoplatform as ESRI Imagery mosaic layers for display on DisMAP.

Key metrics used to evaluate a species distribution (center of gravity latitude, average depth, range limits) are then calculated using a Python script using the interpolated biomass layers for each species for all years.