SEFSC GoMex Oceanic 1993 (S)

NOAA Southeast Fisheries Science Center (SEFSC)

Dataset credit

Southeast Fisheries Science Center, NOAA


Primary contact Lance Garrison NOAA Southeast Fisheries Science Center
Data entry Benjamin Best Duke University
Data entry Ei Fujioka Duke University



A spring marine mammals survey in Gulf of Mexico was conducted in 1993 by NOAA Southeast Fisheries Science Center to examine the diversity, distribution and estimate abundance of marine mammals in U.S. waters. The survey was aimed at meeting the responsibilities under the provisions of the Marine Mammal Protection Act. The survey followed a winter survey in 1993.

This dataset contains sightings of not only cetaceans but also other species including sea turtles, fish and shark observed during the ship survey. During the 39 survey days, 18 species were sighted, including:

Atlantic spotted dolphin

Bowhead whale

Clymene dolphin

Cuvier’s beaked whale

Dwarf sperm whale

Dwarf/pygmy sperm whale

False killer whale

Killer whale

Melon-headed whale

Pantropical spotted dolphin

Pygmy killer whale

Pygmy sperm whale

Risso's dolphin

Rough-toothed dolphin

Short/Long-finned pilot whale

Sperm whale

Spinner dolphin

Standard bottlenose dolphin

Striped dolphin


The purpose of this survey is to examine the distribution and estimate abundance of cetaceans in U.S. waters. Specific objectives of this survey are:

1. Complete a line transect survey of the study area for marine mammals during daylight hours,

2. Collect ichthyoplankton with bongo and double neuston trawl gear for estimates of abundance of eggs, larvae and small juveniles, particularly those of bluefin tuna,

3. Obtain associated environmental and oceanographic data,

4. Record data on marine life, seabirds and debris encountered during line transects,

5. Obtain marine mammal biopsy samples for analysis, and

6. Collect tar samples encountered during neuston sampling SEAMAP stations for analysis.

Supplemental information

[2020-09-30] The following invalid species names were corrected according to the Integrated Taxonomic Information System (ITIS).
Bridled Tern: Sterna anaethetus (176897) => Onychoprion anaethetus (824104)
Laughing Gull: Larus atricilla (176837) => Leucophaeus atricilla (824079)
Red Phalarope: Phalaropus fulicaria (554376) => Phalaropus fulicarius (176734)
Royal Tern: Sterna maxima (176922) => Thalasseus maximus (824142)
Sandwich Tern: Sterna sandvicensis (176927) => Thalasseus sandvicensis (176932)
Sooty Tern: Sterna fuscata (176894) => Onychoprion fuscatus (824105)

The dataset is accompanied by transect data which is provided as a separate file.


NOAA Southeast Fisheries Science Center (SEFSC). 1993. Cruise results: Marine Mammal Survey and Southeast Area Monitoring and Assessment Program (SEAMAP) Ichthyoplankton Survey; NOAA Ship Oregon II Cruise 93-02 (204).



The dataset contains information necessary to locate the species sightings observed in the survey. The structure of the dataset was defined by NOAA Southeast Fisheries Science Center. Note that the dataset is a subset of the larger, complete dataset collected in the survey which includes environmental information. The columns before LineNo are applied to the shapefile only. The following information is not included in the dataset but will be found in the master data. For details, please contact NOAA Southeast Fisheries Science Center. Track; Speed; GPS Status; Observers; Wind direction; Weather; Sea state; Swell; Visibility; Turbidity; Sunlight; Water depth; Water color; Water temperature; Sighting angle; Effort status.

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
linenoLine number
cruisenoCruise No.
dateDate of the observation
timeTime of the observation (local time)
latitudeLatitude in decimal degrees
longitudeLongitude in decimal degrees
trackTrack No
gpswarningGPS Warning
leftobsLeft observer
rightobsRight observer
datarcdrdefinition not provided
weatherWeather code
seastateSea state
versunposVertical sun position
radsunposRadial sun position
watercolorWater color
sightingnoSighting No.
shipidShip ID
oneffortIndicator of on or off effort
watertempWater temperature in degree Celsius
waterdepthWater depth
spcodeSpecies code defined by provider
species_tsnITIS Taxonomic Serial Number added by OBIS-SEAMAP
speciesSpecies name
scientificSpecies scientific name.
herdsizeHerd size
calvesNumber of calves
ontransectIndicator of on or off transect
cookiecttrCookie cutter
gpclassGP class
behaviorBehavior code
cuetimeCue time
cuelatCue latitude
cuelonCue longitude
obsposObserver position
obscodeObservation code
wdepthmWater depth in meters
geomGeometry field added by OBIS-SEAMAP
oidUnique ID number (generated by OBIS-SEAMAP)
Marine mammals271
Sea turtles6
Rays and sharks5
Other species1,390
Non spatial0
Non species74
Date, Begin1993-05-04
Date, End1993-06-15
Temporal prec.111111
Latitude24.49 - 29.53
Longitude-96.31 - -83.99
Coord. prec.4 decimal digits
Data typeAnimal sighting
EffortYES (ID: 18)
Traveled (km)6,102
Effort hours333
Contr. through
Sharing policy CC0 no rights reserved
Shared with OBIS
GBIF (via DOI)
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