Sargasso cruise 2005 - cetacean sightingsEntry ID: seamap332
Abstract: The Sargasso Sea cruise surveyed marine mammals in the Northeast Atlantic Ocean, during the spring and summer of 2005. This survey onboard the Valiant 40 ocean-going research vessel Balaena, consisted of two survey legs: a sail from the Caribbean to offshore waters north of the Bahamas (April 19 - June 2), and a sail north to Halifax, Nova Scotia. Sperm whales were surveyed using acoustics and visual techniques during both cruise legs by members of the Hal Whitehead laboratory.
Purpose: The purpose of this cruise was to study the behaviour (principally social organization), ecology, and population biology of sperm whales. This is the second study year, after a similar cruise in the summer of 2004.
SUPPLEMENTAL INFORMATION: This dataset includes cetacean observations and survey effort. The survey track was recorded by logging a position every 10 minutes using the vessel's GPS. ... The cetacean observations includes sightings during surveys (on effort) and during focal follows of sperm whale schools (off effort). There are two types records for sperm whale, census and encoutner. Encouters, which are defined as events where researchers observe whales by sight or acoustic techniques, are denoted "S" (survey), "E" (encounter), or "AE" (acoustic encounter) in the "Enctr_type" field. These records do not have associated animal counts, and are thus represented by zero in the dataset. In addition to encounters, this dataset includes sightings during "census" surveys, which include group size data, as well as information on the radial distance and angle to each sighting. These survey meta-data are available from the data providers. Census records have non-zero animal counts as for other species. They are denoted C in \\\"Enctr_type\\\" field. Note that \\\"Enctr_type\\\" field is not downloadable by default. To get the field, ask for permission from the data provider.
CURRENTNESS REFERENCE: ground condition
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
Data Set Citation
Dataset Originator/Creator: Dalhousie University
Dataset Title: Sargasso cruise 2005 - cetacean sightings
Dataset Series Name: OBIS-SEAMAP
Dataset Release Date: 2006-03-31 16:42:00.092312-05
Dataset Release Place: http://seamap.env.duke.edu/
Dataset Publisher: OBIS-SEAMAP
Data Presentation Form: vector digital dataOnline Resource: http://whitelab.biology.dal.ca
This data set description is a member of a collection. The collection is described in
Start Date: 2005-04-16Stop Date: 2005-06-23
Latitude Resolution: 0.000167 Decimal degrees
Longitude Resolution: 0.000167 Decimal degrees
Horizontal Resolution Range: 1 meter - < 30 meters
Access Constraints ACCESS CONSTRAINTS: All limits on data accessibility pertaining to the OBIS-SEAMAP system apply to this database.
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 Format: Shapefile
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: hwhitehe at dal.ca
Department of Biology Dalhousie University 1355 Oxford St.
Province or State: Nova Scotia
Postal Code: B3H 4J1
Creation and Review Dates
DIF Creation Date: 2008-01-11
Last DIF Revision Date: 2008-01-13