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Management Units for cetaceans in UK waters (January 2015) 2015


This paper sets out the final agreed Management Units (MUs) for the seven most common cetacean species in UK waters. Details of each MU are provided, including boundaries and estimated abundance figures. The MUs provide an indication of the spatial scales at which impacts of plans and projects alone, cumulatively and in-combination, need to be assessed for the key cetacean species in UK waters, with consistency across the UK.

Following a review of the Management Unit boundaries for cetaceans in UK waters in 2023, the Management Units have been updated, and the management unit shapefiles accompanying this report have been superseded (see JNCC Report 734 for the updated versions). The shapefiles accompanying this report remain available via The National Archives version of our website, or on request (please contact

Resource type Publication

Topic category Environment

Reference date 2015·03·01

IAMMWG. 2015. Management Units for cetaceans in UK waters (January 2015). JNCC Report 547, JNCC, Peterborough, ISSN 0963-8091.

This report was produced by the Inter-Agency Marine Mammal Working Group (IAMMWG), which comprises representatives of the UK Statutory Nature Conservation Bodies (SNCBs).

Responsible organisation
Communications, JNCC publisher

Limitations on public access No limitations

Use constraints Available under the Open Government Licence 3.0

Metadata date 2023·03·30

Metadata point of contact
Communications, JNCC

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