SWFSC Marine Mammal Survey, CADDIS 1995, Cruise 1601

NOAA Southwest Fisheries Science Center (SWFSC)

Dataset credit

Marine Mammal and Turtle Division, Southwest Fisheries Science Center, NMFS, NOAA


Primary contact Jay Barlow NOAA Southwest Fisheries Science Center
Data entry Benjamin Best Duke University



The Cetacean Acoustic Detection and Dive Interval Studies (CADDIS) survey was conducted by the NOAA Southwest Fisheries Science Center primarily in the southern Gulf of California aboard NOAA research ship McArthur from early September to early November 1995 for a total of approximately 6,000 kilometers surveyed. The project focused on two potential approaches to improve abundance estimates of long-diving whales: (1) acoustic detection of diving animals, and (2) collecting dive interval data on those species to serve as a basis for a model-based abundance correction factor. 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.


The primary purpose of this research was to learn how to better estimate the abundance of long-diving whales during ship line-transect surveys. These whale species, including beaked whales and dwarf and pygmy sperm whales, dive for such long periods of time that there is a high probability that they will never surface within the visual range of observers searching from a moving survey vessel with 25X binoculars.

Supplemental information





Attributes described below represent those in the original dataset provided by the provider.
All attributes are included in the downloadable file (CSV or ESRI File Geodatabase) for "Complete Set of Dataset".

Attributes in dataset

Attribute (table column)Description
datasetdefinition not provided
linenoLine No.
dateDate of the sighting
timeTime of the sighting at local time zone
sightnoSighting number
spcodeSpecies code by contributor
scientificScientific name
commonCommon name
tsnTaxonomic Serial Number added by OBIS-SEAMAP
latitudeLatitude in decimal degrees
longitudeLongitude in decimal degrees
schooldefinition not provided
excludeddefinition not provided
geomGeometry field added by OBIS-SEAMAP
oidUnique ID number (generated by SEAMAP)
Marine mammals543
Sea turtles59
Rays and sharks0
Other species0
Non spatial0
Non species47
Date, Begin1995-09-06
Date, End1995-11-07
Temporal prec.111111
Latitude20.50 - 32.24
Longitude-117.39 - -105.30
Coord. prec.2 decimal digits
Data typeAnimal sighting
EffortYES (ID: 218)
Traveled (km)13,053
Effort hours1,488
Contr. through
Sharing policy CC0 no rights reserved
Shared with OBIS
GBIF (via DOI)
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