This document outlines trials using an underwater video camera from a boat to survey deep water sites for freshwater pearl mussels. It also discusses the merits of the new survey methodology and its applicability to Scottish situations.
This is part of our Good Practice Guidance for Invertebrates, produced by Paul Lee.
Reference: Cosgrove P, Hastie L, MacDougall K & Kelly A (2007) Development of a remote deep-water survey method for freshwater pearl mussels. Scottish Natural Heritage Commissioned Report No.263 (ROAME No. F06AC606).