Dublin City Otter Survey
Dublin City Otter Survey An Action of the Dublin City Biodiversity Action Plan 2015-2020 Prepared by Triturus Environmental Ltd. for Dublin City Council August 2019 Please reference as: Macklin, R., Brazier, B. & Sleeman, P. (2019). Dublin City otter survey. Report prepared by Triturus Environmental Ltd. for Dublin City Council as an action of the Dublin City Biodiversity Action Plan 2015- 2020. Dublin City otter survey 2019 1 1. Introduction 3 2. Methodology 9 3. Site descriptions 17 4. Results 42 5. Discussion 71 6. Implications of findings 77 7. Further study 78 8. Acknowledgements 80 9. References 81 Dublin City otter survey 2019 2 1. Introduction 1.1 Project background Triturus Environmental Ltd. consultants were appointed by the Biodiversity Officer (Parks & Landscape Services) of Dublin City Council to undertake a Eurasian otter (Lutra lutra) survey, hereafter otter, of the fourteen major riverine watercourses within their jurisdiction. These watercourses included (listed from north to south) the River Mayne, Santry River, Naniken River, River Tolka, River Liffey, River Camac, River Poddle, River Dodder, Owendoher River, Whitechurch Stream, Little Dargle River, Wyckham Stream, Slang River and Elm Park Stream covering 83.8km. Additionally, the approximate 44.7km of coastal boundary of Dublin City Council was also surveyed. The M50 road network served as a working boundary and no reaches of any watercourses upstream of the motorway were surveyed. The baseline otter surveys, conducted over 2018 and 2019, helped to identify the presence of otters within Dublin City boundaries by identifying the occurrence of otter field signs (i.e. holts, spraints, couches, prints & other signs – see Methodology section below).
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