Harbor Porpoise Survey 1992 (AJ92-01)Entry ID: seamap302
Abstract: The ship survey was performed from 29 July 1992 to 06 September 1992, starting and ending in Woods Hole, MA. The study area, covering approximately 13,300 nmi2, was from Portland, ME to St. John, New Brunswick over to Port Joli, Nova Scotia on the southeast side of Nova Scotia.
Purpose: PRIMARY OBJECTIVE Estimate the abundance of harbor porpoises in the Gulf of Maine - Bay of Fundy - Scotian shelf area. SECONDARY OBJECTIVES 1) Determine the spatial distribution patterns of harbor porpoises, and investigate if the patterns are correlated with hydrographic or biological features, such as, the depth, temperature or salinity of the water or with targets seen on an acoustic fish ... finder. 2) Estimate the abundance and spatial distribution of other cetaceans. 3) Determine if harbor porpoise avoid this ship, and if so, at what distance. 4) Use a 17 foot Zodiac rigid-hulled inflatable boat (RIB) and the R/V Abel-J to survey the Penobscot Bay - Blue Hill Bay area and other bays and harbors along the Maine and Nova Scotia coast. 5) Determine if there is a spatial distribution pattern of mother-calf pairs of harbor porpoise. 6) Compare the abundance estimate and spatial distribution of harbor porpoise as seen this year with that seen in previous years. 7) Determine dive time patterns of individual and groups of harbor porpoises around the sighting platform. 8) Investigate the utility of 2 new electronic data entry systems. 9) Determine the distribution of marine mammals between the northeastern edge of the study area and Halifax, Nova Scotia, on Brown's Bank, and on the continental shelf break in the area south of Brown's Bank.
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.
CURRENTNESS REFERENCE: ground condition
SPATIAL DATA ORGANIZATION INFORMATION
Direct Spatial Reference: Vector
SDTS Point and Vector Object Type: Entity point
Point and Vector Object Count: 1260
SPATIAL REFERENCE INFORMATION - GEODETIC MODEL
Horizontal Datum Name: D_WGS_1984
Ellipsoid Name: WGS_1984
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257224
NATIVE: Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog 188.8.131.520
Data Set Citation
Dataset Originator/Creator: NOAA Northeast Fisheries Science Center (NEFSC)
Dataset Title: Harbor Porpoise Survey 1992 (AJ92-01)
Dataset Series Name: OBIS-SEAMAP
Dataset Release Date: 2005-08-17 19:26:43.525886-04
Dataset Release Place: http://seamap.env.duke.edu/
Dataset Publisher: OBIS-SEAMAP
Data Presentation Form: vector digital data
This description is a member of a collection. The collection is described in
Start Date: 1992-07-31Stop Date: 1992-09-05
Latitude Resolution: 0.000167 Decimal degrees
Longitude Resolution: 0.000167 Decimal degrees
Horizontal Resolution Range: 1 meter - < 30 meters
Quality HORIZONTAL POSITIONAL ACCURACY REPORT: The latitude and longitude of the sighting was determined subsequently using an algorithm which dead reckonings between positions recorded on the effort data form.
VERTICAL POSITIONAL ACCURACY REPORT: The latitude and longitude of the sighting was determined subsequently using an algorithm which dead reckonings between positions recorded on the effort data form.
Access Constraints ACCESS CONSTRAINTS: Open public unless otherwise noted.
DISTRIBUTION LIABILITY: Not to hold OBIS-SEAMAP liable for errors in the data. While we have made every effort to ensure the quality of the database, we cannot guarantee the accuracy of these datasets. Also please refer to Use Constraints.
Use Constraints 1. Not to use data contained in OBIS-SEAMAP in any publication, product, or commercial application without prior written consent of the original data provider. 2. To cite both the data provider and OBIS-SEAMAP appropriately after approval of use is obtained. 3. Not to hold OBIS-SEAMAP liable for errors in the data. While we have made every effort to ensure the quality of the database, we cannot guarantee the accuracy of these datasets.
Data Set Progress
Distribution Size: 0.387
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Email: efujioka at duke.edu
LSRC A321 Box 90328
Province or State: NC
Postal Code: 27708
Role: TECHNICAL CONTACT
Email: dpalka at whsun1.wh.whoi.edu, Debra.Palka at noaa.gov
NMFS NORTHEAST FISHERIES SCIENCE CENTER 166 Water St.
City: Woods Hole
Province or State: MA
Postal Code: 02543
Debra Palka and David Potter. CRUISE REPORT OF THE HARBOR PORPOISE SURVEY - 1992; AJ92-01. 1992. National Marine Fisheries Service. Woods Hole, MA.
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2005-06-07
Last DIF Revision Date: 2016-11-18