SWFSC Marine Mammal Survey, ORCAWALE 2001, Cruise 1617

NOAA Southwest Fisheries Science Center (SWFSC)

Dataset credit

NOAA Southwest Fisheries Science Center (SWFSC)

Contacts

RoleNameOrganization 
Primary contact Jay Barlow NOAA Southwest Fisheries Science Center
Secondary contact Jeffrey Moore Southwest Fisheries Science Center, NOAA
Data entry Ei Fujioka Duke University

Citation

Abstract

The 2001 Oregon, California and Washington Line-Transect Experiment
(ORCAWALE) was designed to estimate the abundance of and to describe the
distribution of dolphins, whales, and porpoises off the west coast of the
United States out to 300 nautical miles. This survey was conducted by the
NOAA Southwest Fisheries Science Center aboard NOAA Ships David Starr
Jordan
and McArthur for a combined total of approximately 10,000
kilometers surveyed from late July to early December 2001. This dataset
provides the time-date and geographical coordinates, by species/stock, of all
cetaceans detected during the survey, as well as the daily and intra-daily start
and end points of the line-transect survey by the NOAA Ship David Starr
Jordan
.

Purpose

The primary purpose of this survey was to estimate the abundance of and to
describe the distribution of dolphins, whales, and porpoises off the west coast of
the United States out to 300 nautical miles.

Supplemental information

[2021-04-13] Updated with additional attributes.

SWFSC MMTD Cruise Number: 1617
Perpendicular distance is not publicly available. Please contact the data
provider if needed.

Attribute descriptions for effort data:
dist: Length of the segment (km)
Mode: Effort mode type (C = closing mode; P = passing mode)

References

Attributes

Overview

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
oidUnique ID number (generated by OBIS-SEAMAP)
eventS = marine mammal sighting; t = sea turtle sighting; p = pinniped sighting
datetimeDate and time of sighting (local time)
latLatitude (decimal degrees) of vessel when sighting was made
lonLongitude (decimal degrees) of vessel when sighting was made
cruiseSWFSC Marine Mammal and Turtle Divison Cruise number
sightnoSighting number (within Cruise)
nspNumber of species observed in the sighting
mixedTRUE for a multi-species sighting (nSp >= 2); FALSE otherwise (nSp = 1)
spcodeSpecies code
sp_tsnTaxonomic Serial Number added by OBIS-SEAMAP
gsspbestThe mean of all observers
gssphighThe mean of all observers
gssplowThe mean of all observers
perpdistkmPerpendicular distance (km) to sighting from trackline
bftBeaufort sea state, as assessed by looking upswell with the naked eye.
swellhghtAverage swell height from trough to crest of typical swells (estimated in feet, by eye)
visA measure of air/atmospheric clarity
groupsize_sightnoRunning count ID of all cetacean groups recorded (should be same as SightNo)
groupsize_countNumber of observers that provided a group size estimate (for calculating GsSpBest) for S events.
groupsize_count_obsNumber of unique observer codes per sighting for S events
geomGeometry field added by OBIS-SEAMAP
OBIS-SEAMAP ID1047
Seabirds0
Marine mammals435
Sea turtles5
Rays and sharks0
Other species0
Non spatial0
Non species1
Total441
Date, Begin2001-07-30
Date, End2001-11-09
Temporal prec.111111
Latitude31.85 - 47.72
Longitude-130.97 - -117.87
Coord. prec.6 decimal digits
PlatformBoat
Data typeAnimal sighting
EffortYES (ID: 1048)
Traveled (km)8,066
Effort hours480
Contr. through
Registered2013-12-03
Updated2021-04-13
StatusPublished
Sharing policy CC-BY-NC (Minimum)
Also available in OBIS
GBIF (via DOI)
See metadata in static HTML
See metadata in FGDC XML
See download history / statistics