Demersais survey in the Azores between 1996 and 2013

Diana Catarino, University of the Azores Department of Oceanography and Fisheries (UAC-DOP);Gui Menezes, University of the Azores Department of Oceanography and Fisheries (UAC-DOP)

Dataset credit

OBIS and EurOBIS

Contacts

RoleNameOrganization 
Primary contact Diana Catarino University of the Azores Department of Oceanography and Fisheries (UAC-DOP)
Primary contact Gui Menezes University of the Azores Department of Oceanography and Fisheries (UAC-DOP)
Secondary contact Institute of Marine Research (IMAR) N/A
Secondary contact University of the Azores Department of Oceanography and Fisheries (UAC-DOP) N/A

Citation

Menezes, G.; Institute of Marine Research (IMAR - Azores), Portugal; Department of Oceanography and Fisheries, University of the Azores (DOP/UAC), Portugal; (2014): Demersais survey in the Azores between 1996 and 2013. https://doi.org/10.14284/22
Catarino, D and G. Menezes. 2020. Demersais survey in the Azores between 1996 and 2013. Data downloaded from OBIS-SEAMAP (http://seamap.env.duke.edu/dataset/103152484) on yyyy-mm-dd and originated from OBIS (https://obis.org/dataset/873ef09c-82b6-4d92-bc91-252c11f5e97d)

Abstract

Demersal surveys performed with bottom longline during research cruises around Azorean islands and several seamounts. Surveys conducted annually (few exceptions) from 1996 to 2013.
Sampling is performed using a "stone-buoy longline" similar to the one used in the commercial demersal fishery in the Azores. The sampling is stratified and random based on depth and geographic areas from 25 meters to 1200 meters mostly, but few sets down to 2000 meters. In some sets a different longline design was used (see Menezes et al. 2009). Soak time was usually 2 to 3 hours, but deeper sets (below 1000 meters) have longer soaks times. Chopped and salted sardines were used as bait.

Purpose

N/A

Supplemental information

This dataset was downloaded from OBIS (https://obis.org/). The records for only marine mammals, seabirds, sea turtles and rays and sharks were extracted. Records with no longitude/latitude or no date (eventDate) were excluded.
OBIS dataset page:
https://obis.org/dataset/873ef09c-82b6-4d92-bc91-252c11f5e97d
Data Provider's dataset page:
http://ipt.vliz.be/eurobis/resource?r=demersais_survey_azores_1996_2013

References

Menezes, G.; Institute of Marine Research (IMAR - Azores), Portugal; Department of Oceanography and Fisheries, University of the Azores (DOP/UAC), Portugal; (2014): Demersais survey in the Azores between 1996 and 2013. https://doi.org/10.14284/22

Attributes

Overview

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
oidInternal ID
idRecord ID
dataset_idDataset ID
scientificnameScientific name
vernacularnameVernacular name
aphiaidAphia ID
taxonranktaxononic rank
individualcountGroup size / individual count
eventdateEvent date (precision varies)
eventtimeEvent time
decimallatitudeLatitude in decimal degrees
decimallongitudeLongitude in decimal degrees
coordinateprecisionCoordinate precision
catalognumberCatalog number
collectioncodeCollection code
occurrencestatusOccurrence status
basisofrecordBasis of record (HumanObservation / MachineObservation)
modifiedDate/time the record was modified
node_idNode ID
occurrenceidOccurrence ID
occurrenceremarksOccurrence remarks
eventidEvent ID
institutioncodeInstitution code
lifestageLife stage
sexGender of the animal if known
speciesSpecies by provider
datasetidDataset ID by provider
countryCountry
localityLocation of ocean
waterbodyDetails of ocean
droppedFlag indicating the record was dropped (always false)
absenceFlag indicating the record represents the absence of the species (always false)
marineFlag indicating the record is for marine life (always true)
OBIS-SEAMAP ID103152484
Seabirds0
Marine mammals0
Sea turtles0
Rays and sharks203
Other species0
Non spatial0
Non species0
Total203
Date, Begin1996-04-06
Date, End2013-10-31
Temporal prec.111000
Latitude36.91 - 39.72
Longitude-37.45 - -25.01
Coord. prec.6 decimal digits
PlatformVarious
Data typeAnimal sighting
EffortN/A
Traveled (km)0
0
Contr. throughiOBIS
Registered2020-06-29
Updated2021-02-05
StatusPublished
Sharing policy CC-BY (All)
Also available in None
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See metadata in FGDC XML
See download history / statistics