AFSC/RACE/SAP: Detailed Crab Data From NOAA Fisheries Service 2012 Chukchi Sea Bottom Trawl Surveys

Metadata Updated: October 13, 2020

Access & Use Information

License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Date March 24, 2020
Metadata Created Date October 13, 2020
Metadata Updated Date October 13, 2020
Reference Date(s) (publication)
Frequency Of Update annually

Metadata Source

Harvested from NMFS AFSC

Additional Metadata

Resource Type Dataset
Metadata Date March 24, 2020
Metadata Created Date October 13, 2020
Metadata Updated Date October 13, 2020
Reference Date(s) (publication)
Responsible Party (Point of Contact, Custodian)
Contact Email
Access Constraints Access Constraints: There are no legal restrictions on access to the data. They reside in public domain and can be freely distributed. | Use Constraints: Population size estimates make the assumption that 100% of the species within the path of the trawl are captured. In fact, the situation is more complex. As with any fishing gear, the survey trawl exhibits some size selectivity. Some crab may escape under the footrope of the net. Survey abundance estimates are probably best seen as relative measures of abundance. This survey was designed as a systematic survey based on a 55.6 km (30 nautical mile (nmi)) square grid pattern with the planned trawl stations located at the approximate center of each grid cell. Any data analysis must take into consideration the survey design for the results to be valid. This dataset includes data obtained from non-standard (special project, beam trawl,opportunistic collections, etc.) tows, and data that may have been collected from poor performance tows. Note that, while 100% of the total catch is sorted for all commercially important crab species, it may not be possible to measure all crabs. This is noted in the SAMPLING_FACTOR data field: a sampling factor of 1 indicates that all crab were measured; a sampling factor > 1 indicates that crabs were subsampled for measurement. To calculate the total number of crab caught by haul, sum the sampling_factor. This database should not be copied or distributed without its associated metadata file. User must read and fully comprehend the metadata prior to use. Use of these data is not restricted; however, organizations, agencies, units of government, or other users are responsible for the appropriate application of these data. Acknowledgement of NOAA/NMFS/AFSC ,as the source from which these data were obtained, in any publications and/or other representations of these data is suggested. | Distribution Liability: The user is responsible for the results of any application of this data for other than its intended purpose.NOAA denies liability if the data are misused.
Bbox East Long -157.17
Bbox North Lat 73.05
Bbox South Lat 66
Bbox West Long -168.58
Coupled Resource
Frequency Of Update annually
Guid gov.noaa.nmfs.inport:23470
Harvest Object Id 3f59b82d-4750-44d1-b40b-16808e056331
Harvest Source Id 4ec9cdf0-d791-4933-8ba3-703563ff892e
Harvest Source Title NMFS AFSC
Licence NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
Metadata Language eng
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 2012-08-01
Temporal Extent End 2012-09-01

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