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Stereo Baited Remote Underwater Video systems (BRUVs) provide a quantitative sampling method for assessing mobile fauna in a range of habitat types and environments. This non-destructive and cost-effective technique is increasingly used for assessing estuarine, coastal and marine fauna. Although single camera systems have been used to assess the relative abundance (Nmax) of marine fish and invertebrates in low visibility North Atlantic near shore and coastal waters, stereo systems remain in their infancy within such environments and their use requires validation. Stereo systems that measure fish and invertebrate size enable size-frequency analysis of populations, providing critical information about life history and population status. We investigated the performance and efficacy of stereo BRUV systems within Welsh shallow coastal waters to test the effectiveness of this method. Data are presented on the capacity of the system to measure fish and invertebrate size under the constraints of low visibility ( |
