Presence-only public data from FOSS

snapshot table for snapshot GAP_PRODUCTS.FOSS_CATCH

Usage

data('public_data')

Format

A data frame with 891144 observations on the following 37 variables.

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 (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.

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 is an integer that uniquely identifies a survey region/survey design. The column survey_definition_id is associated with the srvy and survey columns. Full list of survey definition IDs are in RACE_DATA.SURVEY_DEFINITIONS and in 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.

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.

#'

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)