GOALS Vessel Surveys June - July 2013

Kristen Ampela; Grant Miller-Francisco; Grant Miller-Francisco

doi:10.15468/vh5hxv

GOALS Vessel Surveys June - July 2013

Citation

Ampela K, Miller-Francisco G, OBIS-SEAMAP (2021). GOALS Vessel Surveys June - July 2013. OBIS-SEAMAP. Occurrence dataset https://doi.org/10.15468/vh5hxv accessed via GBIF.org on 2023-09-24.

Description

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).

Purpose

Not available

Sampling Description

Study Extent

NA

Sampling

NA

Method steps

NA

Additional info

marine, harvested by iOBIS

Taxonomic Coverages

Scientific names are based on the Integrated Taxonomic Information System (ITIS).

Berardius bairdii
common name: Baird's Beaked Whale rank: species
Balaenoptera musculus
common name: Blue Whale rank: species
Ziphius cavirostris
common name: Cuvier's Beaked Whale rank: species
Phocoenoides dalli
common name: Dall's Porpoise rank: species
Mirounga angustirostris
common name: Northern Elephant Seal rank: species
Balaenoptera
common name: baleen whales rank: genus
Balaenoptera physalus
common name: Fin Whale rank: species
Eschrichtius robustus
common name: Gray Whale rank: species
Phocoena phocoena
common name: Harbor Porpoise rank: species
Megaptera novaeangliae
common name: Humpback Whale rank: species
Orcinus orca
common name: Killer Whale rank: species
Phoebastria immutabilis
common name: Laysan Albatross rank: species
Balaenoptera acutorostrata
common name: Minke Whale rank: species
Callorhinus ursinus
common name: Northern Fur Seal rank: species
Phoebastria albatrus
common name: Short-tailed Albatross rank: species
Physeter macrocephalus
common name: Sperm Whale rank: species
Odontoceti
common name: toothed whales rank: suborder
Delphinidae
common name: dolphins rank: family
Cetacea
common name: cetaceans rank: order
Caniformia
common name: pinnipeds rank: suborder
Phocoenidae
common name: porpoises rank: family
Cetacea
common name: cetaceans rank: order

Geographic Coverages

Pacific

Bibliographic Citations

Contacts

Kristen Ampela
originator
position: Primary contact
HDR Environmental, Operations and Construction, Inc.
email: Kristen.Ampela@hdrinc.com

Grant Miller-Francisco
originator
position: Secondary contact
HDR Environmental, Operations and Construction, Inc.
email: Grant.Francisco@hdrinc.com

OBIS-SEAMAP
metadata author
Marine Geospatial Ecology Lab, Duke University
A328 LSRC building
Durham
27708
NC
US
email: seamap-contact@duke.edu
homepage: http://seamap.env.duke.edu

OBIS-SEAMAP
distributor
Marine Geospatial Ecology Lab, Duke University
A328 LSRC building
Durham
27708
NC
US
email: seamap-contact@duke.edu
homepage: http://seamap.env.duke.edu

Kristen Ampela
owner
position: Primary contact
HDR Environmental, Operations and Construction, Inc.
email: Kristen.Ampela@hdrinc.com

Grant Miller-Francisco
originator
position: Secondary contact
HDR Environmental, Operations and Construction, Inc.
email: Grant.Francisco@hdrinc.com

Kristen Ampela
administrative point of contact
position: Primary contact
HDR Environmental, Operations and Construction, Inc.
email: Kristen.Ampela@hdrinc.com