NEFSC Survey 1998 1
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 Benjamin Best Duke University



The survey was performed on the R/V Abel-J from 6 July to 4 August 1998 (Leg I), and from 8 August to 6 September 1998 (Leg II) starting and ending in Woods Hole, Massachusetts. The study areas in Leg I and Leg II, respectively, were from Cape Cod. Massachusetts to Virginia, and from Cape Cod, Massachusetts to Halifax, Nova Scotia, Canada. Both study areas extended from the 100 m depth contour to the Gulf Stream.


Primary objectives of the survey were:
1) Estimate the abundance of strategic species of pelagic dolphins and whales, such as common, spotted, and bottlenose dolphins, and sperm, pilot, and beaked whales, and
2) Estimate the abundance of all other dolphins and whales detected in these waters.

Secondary objectives included:
1) Collect bongo, CTD, water depth and temperature data to correlate with the spatial distribution of the marine mammals,
2) Conduct marine mammal photographic and video identification studies, and
3) Collect biopsy samples.

Supplemental information

In addition to the sighting data, effort data were recorded every half hour or whenever conditions changed. This dataset, therefore, should be used with the effort data.




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

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 in dataset provided

Attribute (table column)Description
cruiseCruise ID
yearYear of observation
monthMonth of observation
dayDay of observation
timeTime of the observation (local time)
latLatitude of observation
longLongitude of observation
speciesSpecies observed
sizebNumber of animals
transectTransect No
legLeg No
blankBlank field
geomGeometry field added by OBIS-SEAMAP
oidUnique ID number (generated by OBIS-SEAMAP)
Marine mammals492
Sea turtles13
Rays and sharks0
Other species0
Non spatial0
Non species0
Date, Begin1998-07-08
Date, End1998-08-03
Temporal prec.111111
Latitude37.14 - 40.30
Longitude-73.77 - -68.88
Coord. prec.3 decimal digits
Data typeAnimal sighting
EffortYES (ID: 61)
Traveled (km)2,814
Effort hours169
Sharing policy CC-BY-NC (Minimum)
Also availalbe from iOBIS
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See metadata in FGDC XML
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