Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content

Try the next-generation Data Catalog at catalog-beta.data.gov and help shape it with your feedback.

  • Feedback

    • Cetacean visual observations using line-transect survey methods onboard the NOAA Ship Gordon Gunter (GU) in the Gulf of America (survey GU0402) from 2004-04-15 to 2004-06-10 (NCEI Accession 0284773)

    Metadata Updated: March 1, 2026

    The U.S. National Marine Fisheries Service (NMFS) is required to prepare an annual Stock Assessment Report (SAR) for each marine mammal stock to update abundance, stock structure, maximum net productivity, human-caused mortality, potential biological removal (PBR), and status. In the summer of 2004, the Southeast Fisheries Science Center (SEFSC) conducted a marine mammal survey in the northern Gulf of America. Operations occurred in the waters from 200 m deep seaward to the Exclusive Economic Zone (EEZ) from Brownsville, Texas east into the Straights of Florida. The survey was designed using ship-based, line-transect methods in which experienced marine mammal observers visually located marine mammals, identified the species (to the lowest taxonomic level possible) and counted the number of whales and dolphins sighted along predetermined track-lines. A sighting constitutes a group of marine mammals (whales and dolphins) seen at the same location and time. This dataset includes marine mammal visual observation data and effort points with surveying conditions that can be used in abundance and density modeling per visual line-transect survey protocols. This dataset also includes opportunistic marine mammal photographs and information on biopsy samples collected during the survey.

    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 2026-02-05T19:06:46Z
    Metadata Created Date December 1, 2023
    Metadata Updated Date March 1, 2026
    Reference Date(s) November 21, 2023 (publication), November 20, 2025 (revision), November 2, 2023 (creation)
    Frequency Of Update asNeeded

    Metadata Source

    Harvested from NOAA/NESDIS/ncei/accessions

    Other Data Resources

    Graphic Preview

    Preview graphic

    Additional Metadata

    Resource Type Dataset
    Metadata Date 2026-02-05T19:06:46Z
    Metadata Created Date December 1, 2023
    Metadata Updated Date March 1, 2026
    Reference Date(s) November 21, 2023 (publication), November 20, 2025 (revision), November 2, 2023 (creation)
    Responsible Party (Point of Contact)
    Contact Email
    Guid gov.noaa.nodc:0284773
    Access Constraints Cite as: Martinez, Anthony; Mullin, Keith; Garrison, Lance; Dias, Laura Aichinger; Rappucci, Gina (2023). Cetacean visual observations using line-transect survey methods onboard the NOAA Ship Gordon Gunter (GU) in the Gulf of America (survey GU0402) from 2004-04-15 to 2004-06-10 (NCEI Accession 0284773). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/haac-g960. Accessed [date]., Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
    Bbox East Long -81.2005
    Bbox North Lat 29.4995
    Bbox South Lat 23.859
    Bbox West Long -96.4453
    Coupled Resource
    Frequency Of Update asNeeded
    Graphic Preview Description Preview graphic
    Graphic Preview File https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0284773
    Graphic Preview Type PNG
    Harvest Object Id 9c0c1f9a-2fee-4797-b690-7f2f67a6db33
    Harvest Source Id c084a438-6f6b-470d-93e0-16aeddb9f513
    Harvest Source Title NOAA/NESDIS/ncei/accessions
    Licence accessLevel: Public
    Lineage
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[-96.4453, 23.859], [-81.2005, 23.859], [-81.2005, 29.4995], [-96.4453, 29.4995], [-96.4453, 23.859]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2004-04-15
    Temporal Extent End 2004-10-06

    Didn't find what you're looking for? Suggest a dataset here.