https://doi.org/10.82144/1792dae4 https://seamap.env.duke.edu/dataset/2291 https://www.gbif.org/dataset/0a785fa9-67e8-48ae-b3c5-570c1f66ecb6 https://obis.org/dataset/75a57a5e-4788-422f-9f71-7a324b3c2fe8 Laura Dias NOAA Southeast Fisheries Science Center Primary contact laura.dias@noaa.gov Lance Garrison NOAA Southeast Fisheries Science Center Secondary 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 Laura Dias NOAA Southeast Fisheries Science Center Primary contact laura.dias@noaa.gov owner Lance Garrison NOAA Southeast Fisheries Science Center Secondary contact lance.garrison@noaa.gov originator 2025-07-31 eng Original provider: NOAA Southeast Fisheries Science Center (NEFSC) Dataset credits: NOAA Southeast Fisheries Science Center (SEFSC) Abstract: As part of the Atlantic Marine Assessment Program for Protected Species (AMAPPS), the Southeast Fisheries Science Center (SEFSC) conducted a shipboard survey of the U.S. waters of the Western North Atlantic (WNA) from approximately the 200m isobath out to the U.S. Exclusive Economic Zone (EEZ). The survey was conducted between February 4 and April 27, 2023 onboard the NOAA Ship Gordon Gunter, for a total of 44 days at sea split into three survey legs. Multiple days were lost due to mechanical problems with the ship (Jan 23 to Feb 2) and unfavorable weather conditions (April 8 to 10). February 3 and April 28 were departure (start survey) and arrival (end survey) days, respectively. 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 non-marine mammal sightings such as sea turtles. Occurrence GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type.xml Observation GBIF Dataset Subtype Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_subtype.xml Marine Biology Visual sighting Marine Animal Survey Marine mammals Sea turtles Visual Sighting Vessel 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/hhxz-vm91). Non-animal observations (14 records) 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/2291 Oceans,Atlantic Ocean -86.3561 -70.5381 38.411 23.9966 2023-02-04 2023-04-27 Scientific names are based on the Integrated Taxonomic Information System (ITIS). genus Balaenoptera Baleen whales species Balaenoptera musculus Blue whale species Caretta caretta Loggerhead sea turtle order Cetacea Cetaceans species Cetorhinus maximus Basking shark species Chelonia mydas Green sea turtle family Cheloniidae Sea turtles family Delphinidae Dolphins species Delphinus delphis Short-beaked common dolphin subclass Elasmobranchii Cartilaginous fishes genus Globicephala Pilot whales species Grampus griseus Risso's dolphin genus Kogia Pygmy sperm whales species Kogia breviceps Pygmy sperm whale species Kogia sima Dwarf sperm whale species Lagenodelphis hosei Fraser's dolphin species Megaptera novaeangliae Humpback whale genus Mesoplodon Beaked whales species Mesoplodon europaeus Gervais' beaked whale species Mola mola Ocean sunfish suborder Mysticeti Baleen whales suborder Odontoceti Toothed whales species Physeter macrocephalus Sperm whale species Pseudorca crassidens False killer whale species Rhincodon typus Whale shark family Sphyrnidae Bonnethead sharks genus Stenella Spinner dolphins species Stenella attenuata Pantropical spotted dolphin species Stenella clymene Clymene dolphin species Stenella coeruleoalba Striped dolphin species Stenella frontalis Atlantic spotted dolphin species Steno bredanensis Rough-toothed dolphin species Tursiops truncatus Common bottlenose dolphin family Ziphiidae Beaked whales species Ziphius cavirostris Cuvier'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 Atlantic Ocean. notPlanned Laura Dias NOAA Southeast Fisheries Science Center Primary contact laura.dias@noaa.gov NA NA NA Laura Dias owner Lance Garrison originator NA zd_2291 2025-07-31T17:40:51-04:00 dataset Dias, L. and L. Garrison. 2024. NOAA Ship Gordon Gunter Vessel Line-transect Survey 2023 (GU2301). Version 1.0.0. Dataset published in OBIS-SEAMAP. https://doi.org/10.82144/1792dae4. OBIS-SEAMAP Dataset Page UTF-8 Interactive map https://seamap.env.duke.edu/dataset/2291 FGDC Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/2291/fgdc EML Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/2291/eml OBIS-SEAMAP zd_2291 zd_2291 Palka, Debra; Garrison, Lance; Soldevilla, Melissa; Martinez, Anthony; Dias, Laura A.; Rappucci, Gina. 2024. Cetacean visual observations using line-transect survey methods onboard the NOAA Ship Gordon Gunter (GU) during the Atlantic Marine Assessment Program for Protected Species (AMAPPS) in the Western North Atlantic Ocean (survey GU2301) from 2023-02-04 to 2023-04-27 (NCEI Accession 0290563). NOAA National Centers for Environmental Information.