Updated abundance estimates for cetacean Management Units in UK waters 2021
In 2015, the Inter-Agency Marine Mammal Working Group (IAMMWG) defined Management Units (MUs) for the seven most common cetacean species found in UK waters (IAMMWG 2015): harbour porpoise (Phocoena phocoena), bottlenose dolphin (Tursiops truncatus), short-beaked common dolphin (Delphinus delphis), white-beaked dolphin (Lagenorhynchus albirostris), Atlantic white-sided dolphin (Lagenorhynchus acutus), Risso’s dolphin (Grampus griseus), and minke whale (Balaenoptera acutorostrata). Abundance estimates were calculated for each species within their respective MUs using the most recent data available at the time, notably estimates from the Small Cetacean Abundance in the European Atlantic and North Sea project (SCANS-II; Hammond et al. 2013).
This report details updated abundance estimates for these species and their MUs using the most up-to-date data available as of February 2021, notably SCANS-III (Hammond et al. 2017) and the ObSERVE Programme (Rogan et al. 2018). The cetacean MUs defined in this report are geographical areas in which animals of a particular species are found and management of human activities is applied. These updated estimates supersede those in the previous report (2015) and should be used in preference. MUs are used to inform statutory nature conservation body (SNCB) advice in several ways, including the assessment of environmental impacts in marine casework (e.g. through HRA, EIA).
Resource type Publication
Topic category Environment
Reference date 2021·05·01
IAMMWG. 2021. Updated abundance estimates for cetacean Management Units in UK waters. JNCC Report No. 680, JNCC Peterborough, ISSN 0963-8091.
This report details updated abundance estimates for the seven most common cetacean species found in UK waters and their Management Units (MUs), using the most up-to-date available.
Communications, JNCC publisher
Limitations on public access No limitations
Use constraints Available under the Open Government Licence 3.0
Metadata date 2021·05·21
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