This manual presents the guidelines for Stage 1 and Stage 2 surveys of fresh water pearl mussels in Ireland. Those licensed to carry out Margaritifera survey work in Ireland are expected to use this methodology.
This is part of our Good Practice Guidance for Invertebrates, produced by Paul Lee.
Reference: Anon (2004) Margaritifera margaritifera. Stage 1 and Stage 2 survey guidelines. Irish Wildlife Manuals, No. 12. National Parks and Wildlife Service, Department of Environment, Heritage and Local Government, Dublin, Ireland