Harbor Porpoise Survey 1991 (AJ91-02)Entry ID: seamap288
Abstract: The ship survey was performed from 22 July 1991 to 30 August 1991 to estimate the abundance and spatial distribution of harbor porpoises. The study area, covering approximately 13,300 nm , was from Port Clyde, ME to 2 St. John, New Brunswick over to the Nova Scotian coast, up to Liverpool, Nova Scotia.
Purpose: PRIMARY OBJECTIVES 1) Estimate the abundance of harbor porpoises in the Gulf of Maine - Bay of Fundy - Nova Scotia area. 2) Investigate if there are any spatial distribution patterns of the harbor porpoises, and if those patterns are correlated with water depth or harbor porpoise group size. SECONDARY OBJECTIVES 1) Estimate the abundance and spatial distribution of other cetaceans. 2) Determine if ... harbor porpoise avoid this ship, and if so, at what distance. 3) Determine if there is a spatial distribution pattern of mother-calf pairs of harbor porpoise. 4) Compare the abundance estimate and spatial distribution of harbor porpoise as seen this year with that seen in previous years. 5) Investigate if inland bays can be surveyed using a rigidhull inflatable boat as the observation platform in a line transect survey. 6) Determine if Buckland's sighting procedure (1991), which is a line transect survey using both a primary and marking team, is a feasible procedure to estimate the abundance of harbor porpoise in the Bay of Fundy area.
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: 782
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 126.96.36.1990
Data Set Citation
Dataset Originator/Creator: NOAA Northeast Fisheries Science Center (NEFSC)
Dataset Title: Harbor Porpoise Survey 1991 (AJ91-02)
Dataset Series Name: OBIS-SEAMAP
Dataset Release Date: 2005-08-17 19:48:21.907246-04
Dataset Release Place: http://seamap.env.duke.edu/
Dataset Publisher: OBIS-SEAMAP
Data Presentation Form: vector digital data
This data set description is a member of a collection. The collection is described in
Start Date: 1991-07-24Stop Date: 1991-08-27
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: 0.253
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
David Potter and Debra Palka, National Marine Fisheries Service. CRUISE REPORT OF THE HARBOR PORPOISE SURVEY - 1991 AJ91-02. 1991. Woods Hole, MA.
Creation and Review Dates
DIF Creation Date: 2006-03-14
Last DIF Revision Date: 2008-01-13