https://doi.org/10.82144/80c82ab0 https://seamap.env.duke.edu/dataset/1165 https://www.gbif.org/dataset/86214182-a35a-42a4-b810-6e8a45d3e2a0 https://obis.org/dataset/830cd2fc-25dd-44f2-9a53-272404dac551 Kristen Ampela HDR Environmental, Operations and Construction, Inc. Primary contact Kristen.Ampela@hdrinc.com Grant Miller-Francisco HDR Environmental, Operations and Construction, Inc. Secondary contact Grant.Francisco@hdrinc.com 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

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seamap-contact@duke.edu https://seamap.env.duke.edu distributor Kristen Ampela HDR Environmental, Operations and Construction, Inc. Primary contact Kristen.Ampela@hdrinc.com owner Grant Miller-Francisco HDR Environmental, Operations and Construction, Inc. Secondary contact Grant.Francisco@hdrinc.com originator 2025-07-31 eng Original provider: HDR Environmental, Operations and Construction, Inc. Dataset credits: The U.S. Navy Marine Species Monitoring Program Abstract: Features in this feature class represent animal sightings that occurred during a line-transect vessel survey ("GOALSII") for marine mammals. Real-time acoustic monitoring and recording effort was also conducted using a towed-hydrophone array and sonobuoys around-the-clock to detect and localize vocally active cetaceans. The survey was conducted from 23 June to 18 July 2013 in the U.S. Navy's Temporary Maritime Activities Area in the central GoA, east of Kodiak Island. Work was performed under HDR task order TO 22 (IDIQ contract award N62470-10-D-3011, NAVFAC LANT). There are some discrepancies between the sighting totals in the GOALS II project report and this GIS dataset. For example, the report lists 91 humpback whale sightings (295 count) on-effort, and 15 sightings (36 count) off-effort, while this dataset contains 92 sightings (296 count) on-effort, and 19 sightings (250 count) off-effort. The reason for this discrepancy is that a large non-cohesive group of humpbacks was encountered and individual perpendicular distances could not be estimated for each of the subgroups. The first approach was to stay on effort and complete a “total count” estimate for whales in a specific quadrant until the ship had gone through the majority of the animals. Once completed, it was agreed that perpendicular estimation was needed for every subgroup of whales and the ship altered course and reran the trackline in the opposite direction for observers to get position fixes on as many of the animals/subgroups as possible. On the second pass, the density of whales was not as high and thus the numbers may have differed when compared to the first pass that was ultimately adjusted to be an “off-effort” sighting. Minor discrepancies also exist in sighting counts for other species, in most cases this is the result of how resightings were recorded (instances where the same animal group was observed more than once). 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 Gulf of Alaska Temporary Maritime Activities Area Marine Animal Survey Marine mammals Visual Sighting Aircraft N/A This work is licensed under a Creative Commons Attribution (CC-BY) 4.0 License. https://seamap.env.duke.edu/dataset/1165 Oceans,Pacific -152.612928 -135.55058 59.525852 55.674588 2013-06-23 2013-07-18 Scientific names are based on the Integrated Taxonomic Information System (ITIS). genus Balaenoptera Baleen whales species Balaenoptera acutorostrata Common minke whale species Balaenoptera musculus Blue whale species Balaenoptera physalus Fin whale species Berardius bairdii Baird's beaked whale species Callorhinus ursinus Northern fur seal suborder Caniformia Pinnipeds order Cetacea Cetaceans family Delphinidae Dolphins species Eschrichtius robustus Gray whale species Megaptera novaeangliae Humpback whale species Mirounga angustirostris Northern elephant seal suborder Odontoceti Toothed whales species Orcinus orca Killer whale species Phocoena phocoena Harbor porpoise family Phocoenidae Porpoises species Phocoenoides dalli Dall's porpoise species Phoebastria albatrus Short-tailed albatross species Phoebastria immutabilis Laysan albatross species Physeter macrocephalus Sperm whale species Ziphius cavirostris Cuvier's beaked whale notPlanned Kristen Ampela HDR Environmental, Operations and Construction, Inc. Primary contact Kristen.Ampela@hdrinc.com NA NA NA Kristen Ampela owner Grant Miller-Francisco originator The U.S. Navy Marine Species Monitoring Program zd_1165 2025-07-31T16:31:23-04:00 dataset Ampela, K. and G. Miller-Francisco. 2017. GOALS Vessel Surveys June - July 2013. Version 1.0.0. Dataset published in OBIS-SEAMAP. https://doi.org/10.82144/80c82ab0. OBIS-SEAMAP Dataset Page UTF-8 Interactive map https://seamap.env.duke.edu/dataset/1165 FGDC Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/1165/fgdc EML Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/1165/eml OBIS-SEAMAP zd_1165 zd_1165