Data · collection
NMML Small Cetacean (coastal) Aerial Survey 1999, Gulf of Alaska
Listed in NASA Earthdata CMR
The National Marine Mammal Laboratory (NMML) conducted an aerial survey for small cetaceans from 5 June to 4 July 1999 in Bristol Bay and along southwestern Alaska Peninsula (out to the 1829 m (1000 fm) depth contour).
Description
A total of 8,522 km were surveyed in a Dehavilland Twin Otter at 152.5 m (500 ft) altitude and 185 km/hr (100 kts). Two overlapping sawtooth lines were designed along the coastline of Bristol Bay.
Both sides of each sawtooth were approximately 37 km with a 46 km base. Large bays were also included in the survey. Primary observers searched through bubble windows on the left and right sides of the aircraft and reported sightings to a computer operator.
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To estimate a perception bias correction factor for this study, an independent observer was added at a belly window position to determine the number of animals in the immediate vicinity of the trackline that were missed by the primary observers. There were 215 sightings of harbor porpoise (260 individuals), 12 Dall's porpoise (24 individuals), and 16 Pacific whitesided dolphins (170 individuals) while surveying tracklines.
Additional cetacean sightings included 12 gray whales (13 individuals), 18 humpback whales (29 individuals), 8 minke whales (13 individuals), and 3 killer whales (11 individuals).
Links
Get the data
- seamap.env.duke.edu /datasets/detail/117 ↗
Access data from the OBIS and OBIS-SEAMAP websites.
download · from NASA CMR
- iobis.org /mapper/?dataset=2054 ↗
Access data from the OBIS and OBIS-SEAMAP websites.
download · from NASA CMR
Documentation and papers
- ArcGIS metadata format desktop.arcgis.com/en/arcmap/10.3/manage-data/metadata/the-arcgis-metadata-format… ↗
documentation · from NASA CMR
- Ocean Biogeographic Information System (OBIS) iobis.org ↗
documentation · from NASA CMR
- Biological Data Profile usgs.gov/core_science_systems/csas/metadata/standards.html ↗
documentation · from NASA CMR
- OBIS-SEAMAP Map Service seamap.env.duke.edu/search ↗
documentation · from NASA CMR
- VIEW RELATED INFORMATION seamap.env.duke.edu/prod/services/datasets/show_xml_metadata.php?datasetid=117 ↗
documentation · from NASA CMR
- seamap.env.duke.edu ↗
Ocean Biogeographic Information System - Spatial Ecological Analysis of Megavertebrate Populations (OBIS-SEAMAP)
documentation · from NASA CMR
Catalogue records · 2
- CMR record cmr.earthdata.nasa.gov/search/concepts/C1214586435-SCIOPS.html ↗
catalogue entry · from NASA CMR
- CMR UMM-JSON cmr.earthdata.nasa.gov/search/concepts/C1214586435-SCIOPS.umm_json ↗
metadata API · from NASA CMR
Topics
- Stated by source
- Animals Vertebrates · DeHavilland Twin Otter · Fish
Provenance · 1 source records, 10 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| NASA Earthdata CMR | C1214586435-SCIOPS | 13 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/biological-classification/animals-vertebrates | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[measured_variable].gcmd:earth-science/biological-classification/animals-vertebrates/fish | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| concepts[platform].gcmd_platform:dhc-6 | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| description | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/Abstract |
| license_text | source · NASA CMR | connector:nasa_cmr@1.0.0 | |
| spatial | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/SpatialExtent |
| temporal | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/TemporalExtents |
| title | source · NASA CMR | connector:nasa_cmr@1.0.0 | /umm/EntryTitle |
| version_label | source · NASA CMR | connector:nasa_cmr@1.0.0 |