NEFSC Mid-Atlantic Marine Mammal Abundance Survey 2004

NOAA Northeast Fisheries Science Center (NEFSC)

Dataset credit

NOAA Northeast Fisheries Science Center (NEFSC)


Primary contact Debi Palka NOAA Northeast Fisheries Science Center
Data entry Ei Fujioka Duke University



This dataset includes data from Cruise No. EN 04-395/396, collected on the ship R/V Endeavor. Leg I was conducted from 23 June to 12 July 2004. Leg II was conducted from 16 July to 4 August 2004. Both legs started and ended in Narragansett, Rhode Island, United States. The study area for both legs was in mid-Atlantic waters from the 100 m depth contour to the Gulf Stream, from Virginia to Cape Cod, Massachusetts, United States.


The primary objectives of the survey were to:
1) Determine the spatial distribution and abundance of cetaceans and turtles in the study region,
2) Determine the spatial distribution and relative abundance of sea birds in the same region, and
3) Use passive acoustics to record vocalizing cetaceans that will hopefully be used to improve the abundance estimates derived from the visual surveys.

A secondary objective was to compare the distribution of these species with each other, physical characteristics, such as water depth and temperature, and biological characteristics, such as relative plankton distribution.

Supplemental information

This shipboard survey was conducted in conjunction with an aerial survey 'NEFSC aerial circle-back abundance survey 2004', also available as a separate datset on OBIS-SEAMAP.


Northeast Fisheries Science Center, Marine Fisheries Service, NOAA. 2004. Cruise results: R/V Endeavor Mid-Atlantic marine mammal shipboard abundance survey. Cruise report. EN 04-395/396.



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.
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
cruiseCruise ID
yearYear of observation
monthMonth of observation
dayDay of observation
timeTime of the observation (local time)
latLatitude in decimal degree
longLongitude in decimal degree
speciesSpecies observed
obs_countNumber of animals observed
transectTransect No
legLeg No
geomGeometry field added by OBIS-SEAMAP
oidUnique ID number (generated by OBIS-SEAMAP)
Marine mammals522
Sea turtles7
Rays and sharks0
Other species0
Non spatial0
Non species0
Date, Begin2004-06-24
Date, End2004-08-03
Temporal prec.111111
Latitude37.27 - 40.97
Longitude-74.03 - -65.63
Coord. prec.3 decimal digits
Data typeAnimal sighting
EffortYES (ID: 397)
Traveled (km)4,379
Effort hours285
Contr. through
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