Irish Spatial Data Exchange
Abundance estimate and acoustic monitoring of Harbour porpoise Phocoena phocoena in the Blasket Islands cSAC
A survey of harbour porpoises (Phocoena phocoena) was carried out within the Blasket Islands candidate Special Area of Conservation (cSAC) to derive density and abundance estimates and carry out static acoustic monitoring. Single platform line-transect surveys were carried out on six days between 16 July and 1 October 2007. Distance sampling was used to derive g(0), which is the density of harbour porpoises on the track of the vessel. Passive acoustic monitoring was carried out through the deployment of self-contained click detectors called T-PODs, which identify and log the echolocation clicks of harbour porpoises.
A total of 74 tracks were surveyed of a total distance of 460 km. A total of 44 sightings of 102 individual harbour porpoise were recorded. Sightings of 25 common dolphins (Delphinus delphis), five minke whales (Balaenoptera acutoratrata) and two basking sharks (Cetorhinus maximus) were also recorded.
Simple
- Alternate title
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2007 Harbour porpoise survey Blasket Islands cSAC
- Date (Publication)
- 2022-05-31
- Citation identifier
- https://data.gov.ie/dataset/ / Abundance estimate and acoustic monitoring of Harbour porpoise Phocoena phocoena in the Blasket Islands cSAC
- Purpose
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A survey of harbour porpoises (Phocoena phocoena) was carried out within the Blasket Islands candidate Special Area of Conservation (cSAC) to derive density and abundance estimates and carry out static acoustic monitoring.
- Status
- Completed
- Point of contact
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Organisation name Individual name Electronic mail address Role Department of Housing, Local Government and Heritage
National Parks and Wildlife Service
Point of contact
- Maintenance and update frequency
- As needed
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GEMET - INSPIRE themes, version 1.0
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Species distribution
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GEMET - Concepts, version 4.2.3
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biota, biodiversity, marine fauna, cetacean
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National Parks and Wildlife Service
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National Parks and Wildlife Service, NPWS, marine, mammal, biodiversity
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ISO 3166
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Ireland
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- Use limitation
- Use limitation
- Access constraints
- Other restrictions
- Other constraints
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Copyright Government of Ireland. This dataset was created by National Parks and Wildlife Service, Department of Housing, Local Government and Heritage. This copyright material is licensed for re-use under the Creative Commons Attribution 4.0 International licence. http://creativecommons.org/licenses/by/4.0/
- Spatial representation type
- Vector
- Denominator
- 50000
- Language
- English
- Character set
- UTF8
- Topic category
-
- Environment
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- Begin date
- 2007-07-01
- End date
- 2007-11-30
Vertical extent
- Minimum value
- 0
- Maximum value
- 1014
Vertical CS
Vertical datum
- Reference system identifier
-
https://www.opengis.net/def/crs/EPSG/0/4326
/
4326
EPSG Geodetic Parameter Dataset EPSG 2009-11-25
- Distribution format
-
Name Version Esri shapefile
v10+
- Distributor contact
-
Organisation name Individual name Electronic mail address Role Department of Housing, Local Government and Heritage
National Parks and Wildlife Service
Point of contact
- OnLine resource
-
Protocol Linkage Name zip
https://www.npws.ie/sites/default/files/general/HPBI07_0.zip Dataset
- Hierarchy level
- Dataset
Conformance result
- Title
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INSPIRE Data Specification on Provide Spatial Data Theme keyword
- Alternate title
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INSPIRE Data Specifications v3.0
- Date (Publication)
- 2011-06-15
- Explanation
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The INSPIRE Directive or INSPIRE lays down a general framework for a Spatial Data Infrastructure (SDI) for the purposes of European Community environmental policies and policies or activities which may have an impact on the environment.
- Pass
- No
Conformance result
- Title
-
COMMISSION REGULATION (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
- Alternate title
-
INSPIRE Interoperability Regulation
- Date (Publication)
- 2010-12-08
- Explanation
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Level of conformance with the COMMISSION REGULATION (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services
- Pass
- No
- Statement
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During each transect the position of the survey vessel was tracked continuously through a GPS receiver fed directly into a laptop while survey effort, including environmental conditions (sea-state, wind strength and direction, glare etc.), were recorded directly onto LOGGER software (IFAW) every 15 minutes. When a sighting was made the position of the vessel was recorded immediately and the angle of the sighting from the track of the vessel and the angular distance of the sighting from the vessel recorded. These data were communicated to the recorder in the wheelhouse via a VHF radio. The angle was recorded to the nearest degree via an angle board attached to the vessel immediately in front of each observer. Accurate distance estimation is essential for distance sampling. To assist in estimating distance, tests were carried out prior to the start of each survey by estimating distances to objects which could be verified using a Leica Rangemaster 1200.
Some data was amended to comply with GDPR legislation/ open data publication guidelines. The data was collected during the Harbour porpoise survey of 16th July 2007.
Metadata
- File identifier
- 6c277b5d-ae72-42f1-bad3-80883f5f6c9e XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2023-11-20T14:08:08
- Metadata standard name
-
ISDI Metadata Profile
- Metadata standard version
-
1.2
- Metadata author
-
Organisation name Individual name Electronic mail address Role Department of Housing, Local Government and Heritage
National Parks and Wildlife Service
Author
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