10.82144/88be26f1 https://seamap.env.duke.edu/dataset/2387 zd_2387 GinaRappucciNOAA Southeast Fisheries Science CenterPrimary contact gina.rappucci@noaa.gov LanceGarrisonNOAA Southeast Fisheries Science CenterSecondary contact lance.garrison@noaa.gov OBIS-SEAMAP Marine Geospatial Ecology Lab, Duke University

A328 LSRC building Durham NC 27708 US

seamap-contact@duke.edu https://seamap.env.duke.edu OBIS-SEAMAP Marine Geospatial Ecology Lab, Duke University

A328 LSRC building Durham NC 27708 US

seamap-contact@duke.edu https://seamap.env.duke.edu distributor GinaRappucciNOAA Southeast Fisheries Science CenterPrimary contact gina.rappucci@noaa.gov ownerLanceGarrisonNOAA Southeast Fisheries Science CenterSecondary contact lance.garrison@noaa.gov originator 2026-03-26 eng Original provider: NOAA Southeast Fisheries Science Center (SEFSC) Dataset credits: NOAA Southeast Fisheries Science Center (SEFSC) Abstract: As part of the Vessel Surveys for Abundance and Distribution of Marine Mammals and Seabirds (VSAD) project, the Southeast Fisheries Science Center (SEFSC) conducted a shipboard survey of the U.S. oceanic waters of the Gulf of Mexico out to the Exclusive Economic Zone (EEZ) from 2023-06-22 to 2023-08-14. The survey was designed for a two-team independent visual observer approach with distance sampling to estimate the detection probabilities for marine mammal sightings. A sighting constituted a single or 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 biopsy samples, and non-marine mammal sightings (a.k.a. occurrences) such as sea turtles. OccurrenceGBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type.xmlObservationGBIF Dataset Subtype Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_subtype.xml Marine BiologyVisual sightingMarine Animal SurveyMarine mammalsSea turtlesVisual SightingVessel N/A This is a reformatted version of the archive stored in U.S. National Centers for Environmental Information (NCEI; https://doi.org/10.25921/rp7t-jn41). Sightings reported as Selachii (AphiaID: 368408) were mapped to Elasmobranchii (TSN: 159786) for consistency with the ITIS taxonomy adopted by OBIS‑SEAMAP. Non-animal observations are removed. To the extent possible under law, the publisher has waived all rights to these data and has dedicated them to the Public Domain (CC0 1.0). Users may copy, modify, distribute and use the work, including for commercial purposes, without restriction. https://seamap.env.duke.edu/dataset/2387 Gulf of Mexico,United States of America -96.31435 29.89278 29.89278 24.1517 2023-06-23 2023-08-14 Scientific names are based on the Integrated Taxonomic Information System (ITIS). genusBalaenopteraBaleen whales speciesBalaenoptera riceiRice's whale speciesCaretta carettaLoggerhead sea turtle orderCetaceaCetaceans familyCheloniidaeSea turtles familyDelphinidaeDolphins speciesDermochelys coriaceaLeatherback sea turtle subclassElasmobranchiiCartilaginous fishes genusGlobicephalaPilot whales speciesGrampus griseusRisso's dolphin familyIstiophoridaeBillfishes genusKogiaPygmy sperm whales speciesKogia brevicepsPygmy sperm whale speciesLagenodelphis hoseiFraser's dolphin genusMesoplodonBeaked whales speciesMesoplodon densirostrisBlainville's beaked whale speciesMesoplodon europaeusGervais' beaked whale suborderOdontocetiToothed whales speciesPhyseter macrocephalusSperm whale speciesPseudorca crassidensFalse killer whale genusStenellaSpinner dolphins speciesStenella attenuataPantropical spotted dolphin speciesStenella clymeneClymene dolphin speciesStenella coeruleoalbaStriped dolphin speciesStenella frontalisAtlantic spotted dolphin speciesStenella longirostrisSpinner dolphin speciesSteno bredanensisRough-toothed dolphin speciesTursiops truncatusCommon bottlenose dolphin familyZiphiidaeBeaked whales speciesZiphius cavirostrisCuvier's beaked whale The primary goal was to conduct visual line-transect survey for abundance estimation, and distribution of cetaceans in the U.S. waters of the Gulf of Mexico (GoMx). notPlanned GinaRappucciNOAA Southeast Fisheries Science CenterPrimary contact gina.rappucci@noaa.gov NA NA NA GinaRappucciownerLanceGarrisonoriginator NA 2026-03-26T10:32:18-04:00 dataset Garrison, L. and G. Rappucci. 2026. Vessel Surveys for Abundance and Distribution of Marine Mammals and Seabirds project 2023 (GU2303). Version 1.0.0. Dataset published in OBIS-SEAMAP. Data accessed on yyyy-mm-dd from https://seamap.env.duke.edu/dataset/2387. Martinez, Anthony; Garrison, Lance; Rappucci, Gina; Litz, Jenny; Dias, Laura A.; Wicker, Jesse; Sinclair, Carrie. 2024. Cetacean visual observations using line-transect survey methods onboard the NOAA Ship Gordon Gunter (GU) in the Gulf of America, for the Vessel Surveys for Abundance and Distribution of Marine Mammals and Seabirds project (VSAD survey GU2303) from 2023-06-22 to 2023-08-14. NCEI Accession 0290373NOAA National Centers for Environmental Information. Dataset. OBIS-SEAMAP Dataset Page UTF-8 Interactive map https://seamap.env.duke.edu/dataset/2387 FGDC Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/2387/fgdc EML Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/2387/eml OBIS-SEAMAP zd_2387 zd_2387