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SEAMAP Reef Fish Survey (1992 - 1997; and 2001 - 2015)

Metadata Updated: April 1, 2024

The Southeast Fisheries Science Center Mississippi Laboratories conducts standardized fisheries independent resource surveys in the Gulf of Mexico, South Atlantic, and U.S. Caribbean to provide abundance and distribution information to support regional and international stock assessments. The reef fish survey is conducted primarily on the outer continental shelf of the Gulf of Mexico along topographic features (e.g. reefs, banks and ledges) between Brownsville, TX to the Dry Tortugas, FL. A two-stage sampling design is used with the first stage or primary sampling units being blocks 10 minutes of latitude by 10 minutes of longitude and the second stage being randomly selected sites within the blocks. The first-stage units are selected by stratified random sampling, with stratum boundaries defined by geographic region (4 regions: South Florida, Northeast Gulf, Louisiana-Texas Shelf, and South Texas), and by reef habitat area (Blocks 20 km² reef). Sampling is conducted using a video camera array, vertical line gear and chevron traps with approximately 400 video cameras, 400 vertical line and 100 traps conducted. The camera array consists of four housings positioned orthogonally and center mounted at a height of 51 cm above the bottom of the array. Each housing contains a pair of black-and-white Videre stereo cameras along with a color mpeg camera. Sampling of reef sites with video cameras occurs only during daylight hours, with the first gear deployment one hour after sunrise and the last gear retrieval one hour prior to sunset. Video arrays soak for 35 minutes. At sites selected for fish sampling, a chevron (or arrow) fish trap or vertical line is used to capture fish for biological samples. The chevron fish trap is constructed with 1.5-inch vinyl-clad mesh. In its greatest dimensions, the trap is 1.76 m in length, 1.52 m in width and 0.61 m in depth. A 0.4 m by 0.29 m blow out panel is placed on one side and kept closed using 7-day magnesium releases. The fish trap soaks for one hour and is baited with squid. The vertical line consists of a mainline with 10 gangions. One 8/0, 11/0 or 15/0 circle hook is attached to each gangion and baited with mackerel (Scomber scombrus). The mainline is soaked for five minutes. Most of the animals captured are measured, weighed, tagged and then released. Those individuals which are moribund or have expired are retained to collect biological data pertaining to the life history of these fishes. Habitat mapping is conducted using the SIMRAD ME70 multibeam echosounder. At each site hydrological data is collected using Conductivity Temperature Depth sensor (CTD).

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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 February 29, 2024
Metadata Created Date June 2, 2022
Metadata Updated Date April 1, 2024
Reference Date(s) (publication)
Frequency Of Update

Metadata Source

Harvested from NMFS SEFSC

Additional Metadata

Resource Type Dataset
Metadata Date February 29, 2024
Metadata Created Date June 2, 2022
Metadata Updated Date April 1, 2024
Reference Date(s) (publication)
Responsible Party (Custodian)
Contact Email
Guid gov.noaa.nmfs.inport:29409
Access Constraints Cite As: Southeast Fisheries Science Center, [Date of Access]: SEAMAP Reef Fish Survey (1992 - 1997; and 2001 - 2015) [Data Date Range],, Access Constraints: There are not restrictions or legal prerequisites for accessing this data., Use Constraints: NOAA NMFS does not approve, recommend, or endorse any proprietary product or proprietary material mentioned in this publication. No reference shall be made to NMFS, or to this publication furnished by NMFS, in any advertising or sales promotion which would indicate or imply that NMFS approves, recommends, or endorses any proprietary product or proprietary material mentioned herein or which has as its purpose any intent to cause directly or indirectly the advertised product to be used or purchased because of this NMFS publication. NMFS is not responsible for any uses of these datasets beyond those for which they were intended, and NMFS makes no claims regarding the accuracy of any data provided by agencies or individuals outside NMFS. Acknowledgement of NOAA NMFS and SEAMAP would be appreciated in products derived or publications generated from this data.
Bbox East Long -81
Bbox North Lat 31
Bbox South Lat 24
Bbox West Long -98
Coupled Resource
Frequency Of Update
Harvest Object Id 6167ab77-4fa2-4f09-afbd-838f40c67a9c
Harvest Source Id ca759a40-507d-4d0c-8f8c-64b3c5e05066
Harvest Source Title NMFS SEFSC
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 Reef fish abundance and size data are generated from videos. An index of abundance for each species is determined as the MaxNo, the maximum number of a taxon that is in the field of view in a single video frame. Fish lengths are determined using laser reference points or stereo video processing. Fish are captured using either fish traps, bottom longlines or bandit gear. Fish otoliths are removed to determine age. Data are entered into the database.
Metadata Language eng
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-98.0, 24.0], [-81.0, 24.0], [-81.0, 31.0], [-98.0, 31.0], [-98.0, 24.0]]]}
Progress underDevelopment
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 1992

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