Irish Spatial Data Exchange
Harbour Porpoise Surveys 2008
A survey of harbour porpoises (Phocoena phocoena) was carried out at five sites (North County Dublin, Dublin bay, Cork coast, Roaringwater bay cSAC and Galway bay) to derive density and abundance estimates. Single platform line-transect surveys were carried out on six days at each site between July and September 2008. Distance sampling was used to derive g(0), which is the density of harbour porpoises on the track of the vessel. Abundance estimates were calculated using the track-line as the sample and the sighting as the observation.
During 28 survey days a total of 354 track-lines were surveyed for a total distance of nearly 20,000 km in seastate ≤2. From the 269 sightings of a total of 496 individual harbour porpoise were recorded. There were 13 sightings with a total of 171 common dolphins (Delphinus delphis), eight sightings of single minke whales (Balaenoptera acutoratrata) and one sighting of 20 bottlenose dolphins (Tursiops truncatus). Five sightings with a total of 18 dolphins were not identified to species level.
Simple
- Alternate title
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Harbour porpoise surveys 2008
- Date (Publication)
- 2022-07-06
- Citation identifier
- https://data.gov.ie/dataset/ / Harbour Porpoise Surveys 2008
- Purpose
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A survey of harbour porpoises (Phocoena phocoena) was carried out at five sites (North County Dublin, Dublin bay, Cork coast, Roaringwater bay cSAC and Galway bay) to derive density and abundance estimates.
- 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
- 2008-07-01
- End date
- 2008-09-30
Vertical extent
- Minimum value
- 0
- Maximum value
- 1014
Vertical CS
Vertical datum
- Reference system identifier
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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
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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
- OnLine resource
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Protocol Linkage Name zip
https://www.npws.ie/sites/default/files/general/HPSI08.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
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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
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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 perpendicular distance of the sighting from the vessel recorded. These data were communicated to the recorder in the wheelhouse via 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. At some sites during each survey an orange buoy225mm in diameter was towed 200m astern of the observers’ position on the survey vessel. This provided reference point against which to estimate distances.
The location data in this shapefile was collected in Roaringwater Bay candidate SAC between July and September 2008.
Metadata
- File identifier
- fa911402-aa0c-49a8-88e4-aaf4bd18d225 XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2023-11-20T17:03:41
- Metadata standard name
-
ISDI Metadata Profile
- Metadata standard version
-
1.2
- Metadata author
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Organisation name Individual name Electronic mail address Role Department of Housing, Local Government and Heritage
National Parks and Wildlife Service
Author
)))
