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Fish diversity in southern California using trawl data from the National Marine Fisheries Service

Metadata Updated: March 15, 2024

The Shannon Index of diversity was calculated from National Marine Fisheries Service Groundfish Survey Program (NMFS GSP) fish trawl data. Data from 477 fishery independent trawls ranging from 55-1200 m in depth were collected June-November in 1977, 1989, 1992, 1995, and 1997-2002. Including all fish identified to the species level resulted in 189 fish species. Using ArcGIS, 5 x 5 minute grids were created and mean diversity was calculated for each grid cell containing data. Gear included a nor'eastern trawl (127 mm stretched-mesh body; 89 mm stretched-mesh codend; and 32 mm stretched-mesh codend liner) with a rubber bobbin roller which was trawled for 15-30 minutes on the bottom. Zimmerman's (2003) analysis of benthic species biomass was used to cull out the trawls that did not fish the bottom.

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.

Downloads & Resources

Dates

Metadata Date February 29, 2024
Metadata Created Date November 12, 2020
Metadata Updated Date March 15, 2024
Reference Date(s) 2006-01 (publication)
Frequency Of Update asNeeded

Metadata Source

Harvested from NOS NCCOS

Additional Metadata

Resource Type Dataset
Metadata Date February 29, 2024
Metadata Created Date November 12, 2020
Metadata Updated Date March 15, 2024
Reference Date(s) 2006-01 (publication)
Responsible Party (Point of Contact, Custodian)
Contact Email
Guid gov.noaa.nmfs.inport:38936
Access Constraints Cite As: National Centers for Coastal Ocean Science, [Date of Access]: Fish diversity in southern California using trawl data from the National Marine Fisheries Service [Data Date Range], https://www.fisheries.noaa.gov/inport/item/38936., Access Constraints: None, Use Constraints: Please reference report and source data., Distribution Liability: These data were prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Any views and opinions expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Although all data have been used by NOAA, no warranty, expressed or implied, is made by NOAA as to the accuracy of the data and/or related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by NOAA in the use of these data or related materials.
Bbox East Long -117.232983
Bbox North Lat 35.931048
Bbox South Lat 32.996167
Bbox West Long -122.092243
Coupled Resource
Frequency Of Update asNeeded
Harvest Object Id e4d2300d-2d60-402c-a9ed-edb66aaf2592
Harvest Source Id 9594655d-43d5-48eb-bc7d-86f579a54e78
Harvest Source Title NOS NCCOS
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.
Lineage
Metadata Language eng
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-122.092243, 32.996167], [-117.232983, 32.996167], [-117.232983, 35.931048], [-122.092243, 35.931048], [-122.092243, 32.996167]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True

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