MMS Marine Mammal Survey, PNW 1989-1990

Minerals Management Service

Dataset credit

Minerals Management Service


Primary contact Glenn Ford
Primary contact Janet Casey N/A
Data entry Benjamin Best Duke University



This dataset is from the Oregon and Washington marine mammal and seabird surveys studies: Oregon/Washington aerial [mammal observations] study code: OM, 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.


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.

Supplemental information

[2015-03-24] A few records had a wrong animal count of zero. The value is replaced with an blank representing species presence only.


Green, G. A., J. J. Breuggeman, C. E. Bowlby, R. A. Grotefendt, M. L. Bonnell, and K. T. Balcomb, III. 1991. Cetacean distribution and abundance off Oregon and Washington, 1989-1990. Final Report prepared by Ebasco Environmental, Bellevue, WA, and Ecological Consulting, Inc. , Portland, OR, for the Minerals Management Service, Pacific OCS Region. OCS Study MMS. 91-0093. 100 pp.
Briggs, K. T., D. H. Varoujean, W. W. Williams, R. Glenn Ford, M. L. Bonnell, and J. L. Casey. 1991. Seabirds of the Oregon and Washington OCS, 1989-1990. Final Report prepared by Ebasco Environmental, Bellevue, WA, and Ecological Consulting, Inc. , Portland, OR, for the Minerals Management Service, Pacific OCS Region. OCS Study MMS. 91-0093. 164 pp.



This section explains attributes included in the original dataset. OBIS-SEAMAP restricts the attributes available to the public to date/time, lat/lon and species names/counts only. Should you need other attributes described here, you are encouraged to contact the data provider.

Attributes described below represent those in the original dataset provided by the provider.
Only minimum required attributes are visible and downloadable online. Other attributes may be obtained upon provider's permission.

Attributes in dataset

Attribute (table column)Description
studyStudy code
platformPlatform code
on_On (Y) or off (N) effort
effdateeffort date
date_0Date in original format
dateDate of the observation
time_0Time in original format
timeTime of the observation
speciesSpecies name
species_codeSpecies code
numberGroup size
latLatitude in decimal degrees
lonLongitude in decimal degrees
widthWidth of the transect
newbornsNumber of calves
malesNumber of males
femalesNumber of females
group_Group size
behaviorBehavior code
altitudeAltitude in feet
perpdistdefinition not provided
reldirdefinition not provided
distcodedefinition not provided
weatherWeather code
cloudsCloud code
seastatusSea status
glaredirGlare direction
seatempSea temperature (-99: not available)
recordRecord No.
geomGeometry field added by OBIS-SEAMAP
oidUnique ID number (generated by OBIS-SEAMAP)
Marine mammals1,840
Sea turtles16
Rays and sharks0
Other species49
Non spatial0
Non species0
Date, Begin1989-04-23
Date, End1990-10-03
Temporal prec.111111
Latitude42.03 - 48.40
Longitude-126.89 - -123.92
Coord. prec.5 decimal digits
Data typeAnimal sighting
Traveled (km)0
Contr. through
Sharing policy CC-BY-NC (Minimum)
Shared with OBIS
GBIF (via DOI)
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See metadata in FGDC XML
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