Bottlenose Dolphin Survey Lower River Shannon cSAC, 2010

Published by: Department of Housing, Local Government, and Heritage

Licensed under: Creative Commons Attribution 4.0

Category: Environment

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A population assessment of the bottlenose dolphins in the Lower River Shannon candidate SAC was undertaken between July and October 2010. Dolphins were located on each transect. During 12 transects a total of 64 dolphin groups were encountered with 547 individuals recorded. Group sized ranged from 1-50 overall. Lone dolphins were reported on two occasions. Dolphins were located throughout the survey area with concentrations off Kilcredaun Head, Kilbaha, Leck Point in the outer estuary and Carrig buoy in the middle estuary.

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Theme	Environment
Date released	2022-05-31
Date updated	2023-11-20
Dataset conforms to these standards	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.
Rights notes	{http://creativecommons.org/licenses/by/4.0/,"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/",otherRestrictions}
Update frequency	Other
Language	English
Geographic coverage in GeoJSON format	{"type":"Polygon","coordinates":[[[-10.650444030762, 50.807923689449],[-10.650444030762, 55.993470564449], [-5.289115905762, 55.993470564449], [-5.289115905762, 50.807923689449], [-10.650444030762, 50.807923689449]]]}
Spatial Reference Systems (SRS)	WGS 84 (EPSG:4326)
Vertical Extent	{"verticalDomainName": "EPSG Projection 5731 - Malin Head height", "minVerticalExtent": "0", "maxVerticalExtent": "1014"}
Provenance information	The route of the survey vessel and position of dolphin schools encountered was recorded on a hand-held Garmin 72 GPS and tracks and waypoints downloaded using Garmin MapSource® software. All dolphin schools, defined as all dolphins within 100m radius of each other (Irvine et al., 1981), were recorded and a waypoint entered on the GPS at the start and end of a group encounter. This recorded time as well as location. Each group was approached slowly and group size recorded as the total number of individuals present. The number of adults, juveniles (sub-adults) and calves within the group were recorded. The attribute table of shapefile BDLS10_allgoups.shp has the following fields:
Period of time covered (begin)	2010-07-01
Period of time covered (end)	2010-10-31