https://www.gbif.org/dataset/afdb36af-70e2-4553-bd9b-c129f212cfdc10.82144/f863df46 afdb36af-70e2-4553-bd9b-c129f212cfdc https://seamap.env.duke.edu/dataset/2316 3da67640-16da-4bdd-ae09-63a8b8396014 zd_2316 AndrewGilbertBiodiversity Research InstitutePrimary contact andrew.gilbert@briwildlife.org briwildlife.org 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 AndrewGilbertBiodiversity Research InstitutePrimary contact andrew.gilbert@briwildlife.org briwildlife.orgowner 2026-04-28 eng Original provider: Biodiversity Research Institute Dataset credits: Biodiversity Research Institute HiDef Aerial Surveying Limited Bureau of Ocean Energy Management (BOEM) Abstract: In April 2023, the Biodiversity Research Institute (BRI) commissioned HiDef Aerial Surveying Limited (HiDef) to conduct high-resolution digital video aerial surveys in the Gulf of Maine. The surveys aimed to record marine megafauna, seabirds, and human activity. The designated survey area is approximately 5 km off the coast of Maine A total of four surveys were conducted between May 2023 and January 2024. HiDef designed the survey using 2.5 km- and 5 km-spaced transects across the Gulf of Maine survey area, covering approximately 6,673 km². Surveys were undertaken using an aircraft equipped with four HiDef cameras with a sensor package designed and calibrated to achieve a resolution of 1.5cm Ground Sample Distance (GSD). Each camera sampled a strip of ~ 104m width, separated from the next camera by ~ 17m, to provide a combined sampled width of 416m within a 467m overall strip. All four cameras were analyzed, achieving approximately 10% coverage of the survey area during each flight. Data analysis followed a two-stage process in which video footage was reviewed (with a 20% random sample used for audit) and detected objects were identified to species or species group level (again with 20% selected at random for audit). The audit of both stages requires 90% agreement to be achieved. The surveys recorded a total of 7,248 birds of 33 species and 534 non-avian animals of 12 species, in addition to two dead birds. A further 409 birds and 58 non-avian animals were recorded which were not assigned to a species. An identification rate to species level of 94% was achieved throughout the survey period. 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 SurveySeabirdsMarine mammalsSea turtlesFishDigital SightingAircraft N/A Survey effort (points) is included in the download. This work is licensed under a Creative Commons Attribution (CC-BY) 4.0 License. https://seamap.env.duke.edu/dataset/2316 North Atlantic Ocean -69.821255 43.830891 43.830891 42.930232 2023-05-05 2024-01-04 Scientific names are based on the Integrated Taxonomic Information System (ITIS). speciesAlle alleDovekie speciesBalaenoptera acutorostrataCommon minke whale speciesBalaenoptera physalusFin whale speciesCarcharodon carchariasGreat white shark speciesCetorhinus maximusBasking shark speciesChlidonias nigerBlack tern speciesChroicocephalus philadelphiaBonaparte's gull speciesClangula hyemalisLong-tailed duck speciesDelphinus delphisShort-beaked common dolphin speciesDermochelys coriaceaLeatherback sea turtle speciesFratercula arcticaAtlantic puffin speciesFulmarus glacialisNorthern fulmar speciesGavia immerCommon loon speciesGavia stellataRed-throated loon speciesHalichoerus grypusAtlantic gray seal speciesLagenorhynchus acutusAtlantic white-sided dolphin speciesLarus argentatusHerring gull speciesLarus delawarensisRing-billed gull speciesLarus fuscusLesser black-backed gull speciesLarus glaucoidesIceland gull speciesLeucophaeus atricillaLaughing gull speciesMelanitta nigraBlack scoter speciesMelanitta perspicillataSurf scoter speciesMola molaOcean sunfish speciesMorus bassanusNorthern gannet speciesOceanites oceanicusWilson's storm petrel speciesOceanodroma leucorhoaLeach's storm petrel familyOtariidaeEared seals speciesPandion haliaetusOsprey speciesPhalacrocorax auritusDouble-crested cormorant speciesPhoca vitulinaHarbor seal speciesPhocoena phocoenaHarbor porpoise speciesPrionace glaucaBlue shark speciesPuffinus gravisGreat shearwater speciesPuffinus puffinusManx shearwater speciesRissa tridactylaBlack-legged kittiwake speciesSomateria mollissimaCommon eider speciesSphyrapicus variusYellow-bellied Sapsucker speciesStercorarius parasiticusParasitic jaeger speciesSterna paradisaeaArctic tern speciesTringa melanoleucaGreater yellowlegs In April 2023, the Biodiversity Research Institute (BRI) commissioned HiDef Aerial Surveying Limited (HiDef) to conduct high-resolution digital video aerial surveys in the Gulf of Maine. The surveys aimed to record marine megafauna, seabirds, and human activity. The designated survey area is approximately 5 km off the coast of Maine A total of four surveys were conducted between May 2023 and January 2024. HiDef designed the survey using 2.5 km- and 5 km-spaced transects across the Gulf of Maine survey area, covering approximately 6,673 km². notPlanned AndrewGilbertBiodiversity Research InstitutePrimary contact andrew.gilbert@briwildlife.org briwildlife.org NA NA NA AndrewGilbertowner NA 2026-04-28T11:50:02-04:00 dataset Gilbert, A. 2025. Digital video aerial surveys of seabirds and marine megafauna in the Gulf of Maine from May 2023 to January 2024. Version 1.0.0. Dataset published in OBIS-SEAMAP. https://doi.org/10.82144/f863df46. Stenhouse IJ, Ferguson MC, Gilbert AT, Adams EM, McElroy ME & Williams KA. (in review). 2025. Baseline Wildlife Surveys of the Gulf of Maine, 2023–2024. U.S. Department of the Interior, Bureau of Ocean Energy Management, Sterling, VAOCS Study BOEM 20xx-xxx,78 pp. OBIS-SEAMAP Dataset Page UTF-8 Interactive map https://seamap.env.duke.edu/dataset/2316 FGDC Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/2316/fgdc EML Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/2316/eml OBIS-SEAMAP zd_2316 zd_2316