Dataset Details - Purse Search Shark and Ray Eggcase Sightings Scheme Data, 2007-2018
Distribution of shark and ray eggcases around Ireland's coasts, including citizen scientist observations of discarded eggcases washed up on beaches, as well as some sightings of live eggs underwater. Includes 2 species of shark and 10 species of skate or egglaying ray.
14/03/2022
22/02/2024
To use public participation as a tool for investigating egglaying elasmobranch nursery areas in Ireland.
Observations by citizen scientists were gathered through an online sightings form, with provision of either a photograph or eggcase sample required for species verification. Identification of species was carried out by marine biologists in Marine Dimensions with expertise and experience in the identification of elasmobranch eggcases. Sighting location coordinates were determined according to the information provided by observers in sighting reports and through follow up with our team. In cases where precise coordinates were not provided by the observer, Google Earth was used to determine lat longs for location names. The degree of confidence in the location accuracy was also assessed through the Confidence in Location attribute.
Republic of Ireland
2007-2018
We have a high level of confidence in the dataset due to the strict verifiation process outlined above. The dataset has also been groomed in order to ensure high accurarcy and reliability.
Complete
N/A
Marine Dimensions
Restricted (Data can be viewed on the mapping system but is not available for download)
Marine Dimensions, Purse Search Shark and Ray Eggcase Sightings Scheme Data, 2007-2018, National Biodiversity Data Centre, Ireland, accessed 25 July 2024, <https://maps.biodiversityireland.ie/Dataset/337>
Dataset species distribution

Terrestrial Map - 10km

Distribution of the number of species recorded within each 10km grid square (ITM).
Live Map

Marine Map - 50Km

Distribution of the number of species recorded within each 50km grid square (WGS84).
Live Map
Dataset record distribution

Terrestrial Map - 10km

Distribution of the number of records within each 10km grid square (ITM).
Live Map

Marine Map - 50Km

Distribution of the number of records within each 50km grid square (WGS84).
Live Map
Dataset Contacts
Marine Dimensions
Bríd O'Connor
N/A
01 2828876
Records per year
Species per year
Date Statistics
Resolution No. records
Day 1031
Month 1
Unknown 1
Year Range 1
1
2018
Record Statistics

1034

381

12

0

Resolution No. records
100m 974
1km 0
2km 0
10km 60
50km 0
Dataset Attributes
Attribute Description
Confidence in Location Rated as high, medium or low, depending on accuracy and scale of information provided by the observer.
County Name of administrative county within which the record was made
Number of Purses Abundance of purses recorded
Recorded Species
TaxonId PrefnameTaxonId Name Authority Group Rank Records
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