NEFSC 1995 AJ9501 (Part II)

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



The ship survey was conducted from 06 August 1995 to 05 September 1995, beginning and ending in Woods Hole, MA. The study area covered approximately 12,600 nmi2 , and included the area bounded by Portland, ME to St. John, New
Brunswick, to the southern tip of Nova Scotia.

This cruise was part of a large scale marine mammal sighting survey which consisted of two legs (each approximately a month long) on each of two ships, and a six week aerial survey which was conducted concurrently with vessel operations. The entire study area was from Chesapeake Bay, VA, USA to the Gulf of St. Lawrence, Canada.


The objectives of this survey were to:
1) Estimate the abundance of harbor porpoises in the Gulf of Maine - Bay of Fundy - Scotian shelf area using two different field collection and analysis methods.
2) Determine the spatial distribution and estimate the abundance of other cetaceans found in the above area.
3) Conduct a comparison between sighting rates and spatial distribution of harbor porpoises as seen by two different types of sighting platforms, a ship (the R/V ABEL-J) and an aircraft.
4) Determine spatial distribution patterns of harbor porpoises, and investigate if the patterns are correlated with hydrographic or biological features, such as, water depth, temperature or salinity.
5) Determine if harbor porpoises avoid this ship, and if so, at what distance.
6) Compare the abundance estimate and spatial distribution of harbor porpoises as seen this year with that seen in previous years.

Supplemental information

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

Part I was conducted during July 9 - August 2, 1995.


David Potter, National Marine Fisheries Service. 1995. CRUISE RESULTS; R/V ABEL-J; Cruise No. AJ-95-01 (Part II); Summer Marine Mammal Survey.



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
datasetDataset ID
linenoLine number
cruiseCruise ID
dateDate of the observation
timeTime of the observation (local time)
latitudeLatitude in decimal degrees
longitudeLongitude in decimal degrees
speciesSpecies name
commonCommon name
tsnITIS Taxonomic Serial Number added by OBIS-SEAMAP
scientificScientific name
group_Group size
rankTaxonomic rank
herdsizeGroup size
transectTransect No
legLeg No
excludedFor internal use
geomGeometry field added by OBIS-SEAMAP
oidUnique ID number (generated by OBIS-SEAMAP)
Marine mammals1,402
Sea turtles0
Rays and sharks18
Other species0
Non spatial0
Non species0
Date, Begin1995-08-07
Date, End1995-09-04
Temporal prec.111111
Latitude42.74 - 44.98
Longitude-70.25 - -65.78
Coord. prec.3 decimal digits
Data typeAnimal sighting
EffortYES (ID: 291)
Traveled (km)2,866
Effort hours168
Contr. through
Sharing policy CC0 no rights reserved
Also available in OBIS
GBIF (via DOI)
See metadata in static HTML
See metadata in FGDC XML
See download history / statistics