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Original provider:
Dalhousie University
Dataset credits:
Hal Whitehead, Department of Biology, Dalhousie University
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 behavior (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 encounter. Encounters, 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 animal counts recorded, and count field for these records is null 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 metadata are available from the primary data providers.
Census records have non-zero animal counts as for other species. They are denoted C in [Enctr_type] field.
Note that the [Enctr_type] field is not downloadable by the public, but may be available by request. Please request this data after obtaining permission from the primary data providers.
Link GBIF portal : https://www.gbif.org/dataset/90aebd4e-9353-48de-b009-fd76bce2926d
Project :
Title : Sargasso 2005 - cetacean sightings
Abstract :
Funding : NA
Contact : ()
Key words
No information
Field
continental
marine
Protocole
No information
Geographic extent
Contacts
Type
Organization
Name
Fournisseur
Duke University Marine Laboratory
HYRENBACH David
Fournisseur
Dalhousie University
WHITEHEAD Hal
Producteur
Duke University Marine Laboratory
HYRENBACH
Producteur
Dalhousie University
WHITEHEAD
Fournisseur
PATRINAT (OFB-MNHN-CNRS-IRD)
Publication dates :
First diffusion : 14/03/2023
Last update : 30/11/2023
Species list found :
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Scientific name
CD_NOM
Kingdom
Class
Order
Family
Date of first observation
Date of last observation
Sheet
Chiffres clés :
2 données
2 espèces
2 taxons
Répartition des données par groupes taxonomiques :