Presence-only public data from FOSS

Usage

data('public_data')

Format

A data frame with 939197 observations on the following 37 variables.

area_swept_km2: Area swept (km). The area the net covered while the net was fishing (kilometers squared), defined as the distance fished times the net width.
bottom_temperature_c: Bottom temperature (degrees Celsius). Bottom temperature (tenths of a degree Celsius); NA indicates removed or missing values.
common_name: Taxon common name. The common name of the marine organism associated with the 'scientific_name' and 'species_code' columns. For a complete species list, review the [code books](https://www.fisheries.noaa.gov/resource/document/groundfish-survey-species-code-manual-and-data-codes-manual).
count: Taxon count. Total whole number of individuals caught in haul or samples collected.
cpue_kgkm2: Weight CPUE (kg/km2). Catch weight (kilograms) per unit effort (area swept by the net, units square kilometers).
cpue_nokm2: Number CPUE (no/km2). Numerical catch per unit effort (area swept by the net, units square kilometers).
cruise: Cruise Name. This is a six-digit integer identifying the cruise number of the form: YYYY99 (where YYYY = year of the cruise; 99 = 2-digit number and is sequential; 01 denotes the first cruise that vessel made in this year, 02 is the second, etc.).
cruisejoin: Cruise ID. Unique integer ID assigned to each survey, vessel, and year combination.
net_height_m: Net height (m). Measured or estimated distance (meters) between footrope and headrope of the trawl.
net_width_m: Net width (m). Measured or estimated distance (meters) between wingtips of the trawl.
performance: Haul performance code. This denotes what, if any, issues arose during the haul. For more information, review the [code books](https://www.fisheries.noaa.gov/resource/document/groundfish-survey-species-code-manual-and-data-codes-manual).
scientific_name: Taxon scientific name. The scientific name of the organism associated with the 'common_name' and 'species_code' columns. For a complete taxon list, review the [code books](https://www.fisheries.noaa.gov/resource/document/groundfish-survey-species-code-manual-and-data-codes-manual).
species_code: Taxon code. The species code of the organism associated with the 'common_name' and 'scientific_name' columns. For a complete species list, review the [code books](https://www.fisheries.noaa.gov/resource/document/groundfish-survey-species-code-manual-and-data-codes-manual).
srvy: Survey abbreviation. Abbreviated survey names. The column 'srvy' is associated with the 'survey' and 'survey_definition_id' columns. Northern Bering Sea (NBS), Southeastern Bering Sea (EBS), Bering Sea Slope (BSS), Gulf of Alaska (GOA), Aleutian Islands (AI).
station: Station ID. Alpha-numeric designation for the station established in the design of a survey.
stratum: Stratum ID. RACE database statistical area for analyzing data. Strata were designed using bathymetry and other geographic and habitat-related elements. The strata are unique to each survey region. Stratum of value 0 indicates experimental tows.
surface_temperature_c: Surface temperature (degrees Celsius). Surface temperature (tenths of a degree Celsius); NA indicates removed or missing values.
survey: Survey name. Name and description of survey. The column 'survey' is associated with the 'srvy' and 'survey_definition_id' columns.
survey_definition_id: Survey ID. The survey definition ID key code uniquely identifies a survey/survey design. Integer code that uniquely identifies survey. Full list of survey definition IDs are in RACE_DATA.SURVEY_DEFINITIONS. IDs used in GAP_PRODUCTS are: 47 (Gulf of Alaska); 52 (Aleutian Islands); 78 (Bering Sea Slope); 98 (Eastern Bering Sea Shelf); 143 (Northern Bering Sea Shelf). The column 'survey_definition_id' is associated with the 'srvy' and 'survey' columns. For a complete list of surveys, review the [code books](https://www.fisheries.noaa.gov/resource/document/groundfish-survey-species-code-manual-and-data-codes-manual).
taxon_confidence: Taxon confidence rating. Confidence in the ability of the survey team to correctly identify the taxon to the specified level, based solely on identification skill (e.g., not likelihood of a taxon being caught at that station on a location-by-location basis). Quality codes follow: **'High'**: High confidence and consistency. Taxonomy is stable and reliable at this level, and field identification characteristics are well known and reliable. **'Moderate'**: Moderate confidence. Taxonomy may be questionable at this level, or field identification characteristics may be variable and difficult to assess consistently. **'Low'**: Low confidence. Taxonomy is incompletely known, or reliable field identification characteristics are unknown. Documentation: [Species identification confidence in the eastern Bering Sea shelf survey (1982-2008)](http://apps-afsc.fisheries.noaa.gov/Publications/ProcRpt/PR2009-04.pdf), [Species identification confidence in the eastern Bering Sea slope survey (1976-2010)](http://apps-afsc.fisheries.noaa.gov/Publications/ProcRpt/PR2014-05.pdf), and [Species identification confidence in the Gulf of Alaska and Aleutian Islands surveys (1980-2011)](http://apps-afsc.fisheries.noaa.gov/Publications/ProcRpt/PR2014-01.pdf).
vessel_id: Vessel ID. ID number of the vessel used to collect data for that haul. The column 'vessel_id' is associated with the 'vessel_name' column. Note that it is possible for a vessel to have a new name but the same vessel id number. For a complete list of vessel ID key codes, review the [code books](https://www.fisheries.noaa.gov/resource/document/groundfish-survey-species-code-manual-and-data-codes-manual).
vessel_name: Vessel name. Name of the vessel used to collect data for that haul. The column 'vessel_name' is associated with the 'vessel_id' column. Note that it is possible for a vessel to have a new name but the same vessel id number. For a complete list of vessel ID key codes, review the [code books](https://www.fisheries.noaa.gov/resource/document/groundfish-survey-species-code-manual-and-data-codes-manual).
weight_kg: Sample or taxon weight (kg). Weight (thousandths of a kilogram) of individuals in a haul by taxon.
worms: World register of marine species (WoRMS) taxonomic serial number. Species code as identified in the World Register of Marine Species (WoRMS) (https://www.marinespecies.org/).
year: Survey year. Year the observation (survey) was collected.
date_time: Date and time. The date (MM/DD/YYYY) and time (HH:MM) of the haul. All dates and times are in Alaska time (AKDT) of Anchorage, AK, USA (UTC/GMT -8 hours).
depth_m: Depth (m). Bottom depth (meters).
distance_fished_km: Distance fished (km). Distance the net fished (thousands of kilometers).
duration_hr: Tow duration (decimal hr). This is the elapsed time between start and end of a haul (decimal hours).
haul: Haul number. This number uniquely identifies a sampling event (haul) within a cruise. It is a sequential number, in chronological order of occurrence.
hauljoin: Haul ID. This is a unique numeric identifier assigned to each (vessel, cruise, and haul) combination.
id_rank: Lowest taxonomic rank. Lowest taxonomic rank of a given species entry.
itis: Integrated taxonomic information system (ITIS) serial number. Species code as identified in the Integrated Taxonomic Information System (https://itis.gov/).
latitude_dd_end: End latitude (decimal degrees). Latitude (one hundred thousandth of a decimal degree) of the end of the haul.
latitude_dd_start: Start latitude (decimal degrees). Latitude (one hundred thousandth of a decimal degree) of the start of the haul.
longitude_dd_end: End longitude (decimal degrees). Longitude (one hundred thousandth of a decimal degree) of the end of the haul.
longitude_dd_start: Start longitude (decimal degrees). Longitude (one hundred thousandth of a decimal degree) of the start of the haul.

Source

https://github.com/afsc-gap-products/gap_products and https://www.fisheries.noaa.gov/foss/f?p=215:28:14951401791129:::::

Details

The Resource Assessment and Conservation Engineering (RACE) Division Groundfish Assessment Program (GAP) of the Alaska Fisheries Science Center (AFSC) conducts fisheries-independent bottom trawl surveys to assess the populations of demersal fish and crab stocks of Alaska.

Author

Emily Markowitz (Emily.Markowitz AT noaa.gov)

Examples

data(public_data)