NEFSC 1995 pe9501

NOAA Northeast Fisheries Science Center (NEFSC)

Dataset credit

National Marine Fisheries Service


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



The survey was performed from 09 July 1995 to 03 August 1995, starting in Norfolk, VA and ending in Woods Hole, MA. The study area, covering approximately 39,200 nmi2, was in the slope waters from Chesapeake Bay, VA to Cape Cod, MA. Most of the survey was between 10 nautical miles (nmi) inshore of the 50 fathom contour and 10nmi offshore of the 1000 fathom contour.
This survey was part of a large scale marine mammal sighting survey which consisted of two legs (each approximately a month long) where two ships were used during each leg, with an addition leg in which a plane was used to survey for six weeks. The entire study area was from Chesapeake Bay, VA, USA to
the Gulf of St. Lawrence, Canada.


The objectives of this leg of the survey were to:
1) Determine the spatial distribution and estimate the abundance of marine mammals found in the above study area.
2) Determine if spatial distribution patterns of marine mammals are correlated with hydrographic features, such as, water depth, temperature or salinity, or with biological features, such as zooplankton distribution.

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.


David Potter, National Marine Fisheries Service. 1995. Marine Mammal Abundance Survey - Leg1. Cruise report. PE 95-01.



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 name
linenoLine number
cruiseCruise number designated by NEFSC
dateDate when the record was recorded
timeTime of the observation (local time)
latitudeLatitude in decimal degrees
longitudeLongitude in decimal degrees
speciesCode of species sighted
commonSpecies common name.
tsnITIS Taxonomic Serial Number added by OBIS-SEAMAP
scientificSpecies scientific name
group_Group name the species belongs to
rankRank such as species, genus and family
herdsizeAn estimate of the number of individuals.
transectTransect no.
legLeg no.
excludedFor internal use
geomGeometry field added by OBIS-SEAMAP
oidUnique ID number (generated by OBIS-SEAMAP)
Marine mammals433
Sea turtles7
Rays and sharks0
Other species0
Non spatial0
Non species0
Date, Begin1995-07-10
Date, End1995-08-02
Temporal prec.111111
Latitude36.81 - 40.40
Longitude-74.70 - -69.72
Coord. prec.3 decimal digits
Data typeAnimal sighting
EffortYES (ID: 297)
Traveled (km)3,049
Effort hours186
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