Harbour porpoise surveys in Rockabill to Dalkey Island SAC, 2021

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Provided by Department of Housing, Local Government, and Heritage

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Dataset information

Catalog

Department of Housing, Local Government, and Heritage catalog

Country of origin

Ireland

Updated

2026.04.07 15:05

Created

2022.12.01

Available languages

English

Keywords

environment, marine, biodiversity, ireland, biota, species distribution, national parks and wildlife service, mammal, cetacean, npws, marine fauna

Datasource

Official portal for European data link

Quality scoring

Dataset description

In order to contribute to the Department Housing, Local Government & Heritage (DHLGH) site management and surveillance, visual monitoring of harbour porpoises was carried out in Rockabill to Dalkey Island SAC during the summer of 2021. This was the third dedicated line transect survey of harbour porpoises within this SAC which enabled ongoing trends in summer density estimates to be explored. The objectives of the survey in 2021 were to: i) derive updated summer density and population estimates for harbour porpoises within the Rockabill to Dalkey Island SAC using robust sampling methods for small cetacean density/population estimation; ii) estimate associated Coefficients of Variation and 95% Confidence Intervals

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