Distribution and Relative Abundance of Common Dolphin in Irish EEZ 2005-2011

Common dolphins are Irelands most widespread and abundant dolphin species.They have an average body length: of 1.7 – 2.6 m.The beak, and back are dark brown to black, and the underbelly is white. The front flank patches are yellow and the rear flanks and the sides of the tailstock are streaked light grey.

These features give a distinctive hourglass pattern on the sides, below the dorsal fin.The eye is surrounded by black, and a narrow stripe runs forward to the melon.Another dark stripe runs from beak to flipper and several beak-to-anus stripes may also be visible. A falcate dorsal fin is located mid-way along the back.The general body shape is sleek with the head having a prominent black beak. Common dolphins often approach vessels to bow ride and frequently breach clear of the water. Melanism is sometimes seen in this species, with elanistic animals lacking yellow pigmentation, which is replaced with black.

The data collected includes observations, relative abundance, search for and range of Common Dolphin (Delphinus delphis) recorded from marine mammals observations on board ships of opportunity between 2005 and 2011.

 
Citation proposal
(2013) . Distribution and Relative Abundance of Common Dolphin in Irish EEZ 2005-2011. https://services.mspdata.eu:/geonetwork/srv/api/records/d1346b5c-06bb-4546-96ee-e83e8fc425e1

Simple

Alternate title

IWDG Marine Mammals Atlas Common Dolphin Distribution

Date ( Creation )
2005-01-01T00:00:00
Date ( Publication )
2013-12-31T00:00:00
Date ( Revision )
2015-11-20T00:00:00
Identifier

INSPIRE UUID

/

SD.IE.IWDG.AtlasMarineMammals.CommonDolphin

/

1.0

Purpose

Ireland has an obligation to report to the European Union on the favourable conservation status (FCS) of certain protected species and habitats every six years and this requires comprehensive species and habitat monitoring networks at a national level.

Status
Completed

  Point of contact

  +44-77-71762355 
Maintenance and update frequency
Unknown
GemetInspireTheme ( Theme )

  • Species distribution

GEMET - Concepts, version 3.1 ( Theme )

  • cetacean, mammal, vertebrate

Irish Whale and Dolphin Group ( Theme )

  • dolphin, Common Dolphin, Delphinus delphis, marine mammals, distribution, Irish Whale and Dolphin Group

ISO 3166 ( Place )

  • Ireland

Use limitation

Creative Commons licence conditions apply

Use limitation

Creative Commons CC-BY 4.0

Access constraints
License
Use constraints
License
Other constraints

https://creativecommons.org/licenses/by/4.0/

Spatial representation type
Grid
Denominator
50000
Metadata language
English
Character set
UTF8
Topic category
  • Oceans
  • Geoscientific information
  • Biota
N
S
E
W


Vertical extent

Minimum value
-5000
Maximum value
-1

Vertical CS

Vertical datum

Supplemental Information

Vector dataset.

Reference system identifier

EPSG

/

http://www.opengis.net/def/crs/EPSG/0/4326

 

Alternate title

EPSG

Date ( Publication )
2009-11-25

Distribution format

  • CSV, KML, Esri shapefile, WMS, WFS, REST, GeoJSON

    (

    RFC 1480, 7.0, V10.x, 1.3.0, 2.0, Esri, 4.0

    )

  Point of contact

  +44-77-71762355 
OnLine resource
REST service  
OnLine resource
GeoJSON  
OnLine resource
WMS GetCapabilities  
OnLine resource
WFS GetCapabilities  
Hierarchy level
Dataset

Conformance result

Alternate title

INSPIRE Data Specifications v3.1

Date ( Publication )
2014-04-17
Explanation

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
false

Conformance result

Alternate title

INSPIRE Interoperability Regulation

Date ( Publication )
2010-12-08
Explanation

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
false
Statement

This Atlas presents data collected during the IWDG ISCOPE I and II projects, the IWDG/GMIT Marine Mammals and Megafauna in Irish waters project, the IWDG Ferry Surveys Programme and the IWDG casual and effort-based sightings scheme between January 2005 and January 2011. A single marine mammal observer (or up to three observers, in the case of IWDG ferry surveys) conducted visual survey effort from research vessels, naval service vessels and commercial ro-ro ferries between 2005 and 2011. Survey effort was conducted either from the ships’ bridge, the monkey island (the roof of the bridge) or from the ‘crow’s nest’ (R.V. Celtic Explorer). Using an angle board and distances were estimated with the aid of a range finding stick (Heinemann 1981). Environment data were recorded every 15 – 20 minutes using Logger 2000 software (IFAW 2000). Sightings were also recorded using Logger 2000. Automated position data were obtained through a laptop computer linked to a USB GPS receiver. Survey effort was conducted up to Beaufort sea-state six and in moderate to good visibility.As these were surveys on board vessels of opportunity, the surveys were conducted in ‘passing mode’ and cetaceans sighted were not approached.

Sightings were identified to species level where possible, with species identifications being graded as definite, probable or possible.Where species identification could not be confirmed, sightings were downgraded (e.g. unidentified dolphin / unidentified whale / unidentified beaked whale etc.) according to criteria established for the IWDG’s cetacean sightings database (IWDG 2013). Observer effort focused on a 90 degree arc ahead of the ship; however sightings located up to 90 degrees to port and starboard were included. Surveyors scanned the area by eye and using binoculars (typically 10X40 or 8X50). Bearings to sightings were measured.

Metadata

File identifier
d1346b5c-06bb-4546-96ee-e83e8fc425e1   XML
Metadata language
English
Character set
UTF8
Hierarchy level
Dataset
Date stamp
2018-01-25T15:25:13
Metadata standard name

ISDI Metadata Profile

Metadata standard version

1.2

  Point of contact

  +353-91-387201 
 
 

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