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MMS Aerial Survey, PNW 1989-1990

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Availability: Creative Commons License This dataset is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

Description
Dataset from the Oregon and Washington marine mammal and seabird surveys studies conducted from April 1989 through October 1990. more

This dataset is from the Oregon and Washington marine mammal and seabird surveys studies: Oregon/Washington aerial [birds and mammals] study code: OP, contract number: 14-12-0001-30426, Principal investigators: G. A. Green, Ebasco Environmental, Bellevue, Washington, M. L. Bonnell and K. T. Briggs, Ecological Consulting, Inc., Portland, Oregon. Time period: April 1989 through October 1990 Study area: Pacific Ocean waters of Oregon and Washington from the coast to approximately 60 nautical miles offshore. Methodology: Aerial surveys were conducted along 32 pre-established transects designed to systematically sample marine mammal and seabird abundance in all waters of the study area. Coastal surveys and one shelf break survey were also conducted. Standard transects provided systematic coverage of shelf, slope, and offshore waters in the study area. Sightings of seabirds, pinnipeds, cetaceans, and turtles were recorded. Seabird sightings were recorded only on the shaded side of the aircraft within a strip transect of 50 m width. Marine mammal and turtle sightings were recorded within an unbounded corridor. Declination angle was measured and noted for each marine mammal/turtle sightings and later used to calculate a probability density function of frequency with right-angle sighting distance. Navigation was by Loran and VLF-Omega. One ship survey was also conducted from aboard the NOAA ship Miller Freeman during August 1989. Databases produced: 1) sightings of seabirds and marine mammals on 12 aerial surveys and one ship cruise, and 2) sightings of cetaceans on 12 aerial surveys and one ship cruise. Purpose Objectives of the study were to review and analyze all available literature and databases concerning marine mammal and seabird diversity, distribution, and abundance in the Oregon-Washington coastal and offshore areas; to conduct field surveys over a 18-month period and to prepare reports summarizing the findings.

Scope
Themes:
Biology > Birds, Biology > Fish, Biology > Mammals, Biology > Reptiles
Keywords:
Marine, I, North Pacific, Aves, Mammalia, Pisces, Testudines

Geographical coverage
I, North Pacific [Marine Regions]

Temporal coverage
23 April 1989 - 3 October 1990

Taxonomic coverage
Aves [WoRMS]
Mammalia [WoRMS]
Pisces [WoRMS]
Testudines [WoRMS]

Related datasets
Published in:
OBIS-SEAMAP: Spatial Ecological Analysis of Megavertebrate Populations, more

URLs

Dataset information:

Dataset status: Completed
Data type: Data
Data origin: Research
Metadatarecord created: 2012-11-22
Information last updated: 2012-11-22
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