Slide Menu
Search Help Show/Hide Menu

Item Identification

Title: Supplemental discard data
Short Name: Supplemental discard data
Status: In Work

This data set contains data on the type and amount of marine resources that are discarded or interacted with by vessels that are selected to report to the Southeast Fisheries Science Center?s Coastal Fisheries Logbook Program. The supplemental discard program was initiated by the SEFSC in July 2001 and data collection began in August. To reduce the reporting burden on the fishermen, a 20% sample of the vessels with a Gulf of Mexico, South Atlantic snapper-grouper, king mackerel, Spanish mackerel or shark permit was selected to report. To assure that the sample is representative of the total universe of vessels with Federal permits, a stratified, random sample is selected from the universe of all vessels with the above types of Federal permits. For the first year (8/1/2001 - 7/31/2002), a 3 tiered stratification was used. One tier was geographical, and the universe was divided into two geographical strata - the Gulf of Mexico (Florida Keys to the Texas-Mexican border) and the South Atlantic (which extends from the North Carolina - Virginia border to the Florida Keys). The second stratum was based on the type of gear. There were 5 categories in this stratum - handline, longline, trolling, trap and gill nets. The third stratum was based on the fishing activity of the vessels during calendar year 2000. There were two strata in this tier - (1) vessels that made between 1 and 10 trips and (2) vessels that made more than 10 trips. In all, there were 20 strata for the sampling in the first year. However, there were too few boats that used gill nets in the Gulf of Mexico, so all of the boats that used gill nets in the Gulf were combined into a single stratum. As a result, 20% of the vessels in the in 19 strata were selected at random to submit a discard form along with their regular coastal fisheries logbook form for each trip.

For subsequent years, the strata were reduced to only two, instead of three. The fishing activity stratum was eliminated because too many of the vessels changed their fishing patterns and moved to a different stratum throughout the year. Consequently, 10 strata, two geographical and 5 gear strata, continue to be used for random selections of vessels that are required to submit their discard information. In addition, the selections are made without replacement. That is, if a vessel is selected, it is removed from selection for the next couple of years, until all vessels have been selected in the respective strata.

Fishermen are asked to provide the numbers of fish or shellfish that they discarded during the fishing trip. They are also asked to record any interactions with marine mammals or endangered species that they had during the trip. In addition, they are asked to estimate the condition of the fish (animals) when they were released. The fishermen are given 6 options for the condition of released fish. These options are; all animals are dead, majority of the animals are dead, all animals are alive when released, majority of animals are alive, the fish are kept but not sold, and the condition of the animals is unknown. The fishermen are also asked to specify one of two reasons why the fish (animals) were discarded. The choices are either regulatory discards or because the fish were not marketable.


The purpose of the discard reporting program is to collect information on the numbers of fish and/or shellfish that are discarded during trip where species in the coastal fisheries are caught. Although this type of information is difficult to collect because the amount and diversity of species that are culled from the retained catches is large, fishermen are asked to provide their best estimates of the species and quantities.


Discard Reporting Periods:

2001* (Aug 2001-July 2002)

2002 (Aug 2002-July 2003)

2003 (Aug 2003-July 2004)

2004 (Aug 2004-July 2005)

2005-2006 (Aug 2005-Dec 2006)

2007- present (Jan - Dec yearly)

* 3 tiered stratification

Supplemental Information:

To reduce the reporting burden on the fishermen, a 20% sample of the vessels with a Gulf of Mexico, South Atlantic snapper-grouper, king mackerel, Spanish mackerel or shark permit was selected to report. Paper forms received from the fishermen are optically scanned. The data file is loaded through the FLS (Fisheries Logbook System) client server software. This data set has a separate menu option for loading and validating the data. Problems detected by the validation routines are resolved by FLS staff recontacting the fishermen.


Theme Keywords

Thesaurus Keyword
None Discards
None grouper
None King Mackerel
None sharks
None snapper
None Spanish Mackerel

Temporal Keywords

Thesaurus Keyword
None 2001-present

Spatial Keywords

Thesaurus Keyword
None Gulf Of Mexico
None South Atlantic

Physical Location

Organization: Southeast Fisheries Science Center
City: Miami
State/Province: FL
Country: USA

Support Roles

This Catalog Item has no Support Roles that are currently in effect.
View Historical Support Roles


Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 7658
W° Bound: -98
E° Bound: -72
N° Bound: 37
S° Bound: 22


Access Information

Security Class: Confidential
Data Access Procedure:

Read and sign for NOAA Administrative Order 216-100

Read and sign System Access Application (see URLs)

Contact DBA Daniel Leon for userid/password.

Data Access Constraints:

Access is restricted to personnel authorized in accordance with NOAA Administrative Order 216-100. A signed non-disclosure agreement must be on file for all authorized personnel.


Issue 1

CC ID: 8781
Issue Date: 2005-11-15
Author: John Poffenberger

The data contained in this data set are estimates provided by fishermen during their normal fishing activity. These data should be treated as ¿best estimates¿ and not as absolute counts made by observers dedicated to data gathering. The response by fishermen has been good and most of the data appear to be very reasonable. However, it is recommended that the data should be inspected for outliers before using them in statistical analyses

Issue 2

CC ID: 8782
Issue Date: 2005-11-15
Author: John POffenberger

The supplemental discard data contain a ¿trip¿ or sequence number that is a direct link to the corresponding trip in the coastal fisheries logbook data.


HMS Highly Migratory Species

Child Items

Rubric scores updated every 15m

Rubric Score Type Title
Data Set Coastal Discard Logbook Survey (Vessels)

Catalog Details

Catalog Item ID: 1927
GUID: gov.noaa.nmfs.inport:1927
Metadata Record Created By: Lee M Weinberger
Metadata Record Created: 2006-06-13 16:10+0000
Metadata Record Last Modified By: Lee M Weinberger
Metadata Record Last Modified: 2021-05-06 22:24+0000
Metadata Record Published: 2021-05-06
Owner Org: SEFSC
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Next Review Date: 2022-05-07