Fishing vessels execution of acoustic surveys for deep-sea species: main issues and way forward
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This Food and Agriculture Organization Fisheries and Aquaculture Circular is based on the Workshop on Fishing-vessel Execution of Acoustic Surveys for Deep-sea Species: Main Issues and Way Forward, held in Rome, Italy, from 9 to 11 December 2009. The report synthesizes current knowledge and practice for engaging the fishing industry in the management of the resources they target, highlights the main challenges that arise, and discusses how analysts and decision-makers can use this experienc e in undertaking aggregation-based fishing-vessel executed acoustic surveys. The topics considered by this workshop included the conditions required at sea for successful fishing-vessel deep-water acoustics surveys, the equipment to be used and its maintenance, processing of data, the problems arising from uncertainty in the backscattering cross section–biomass relation, survey methods, the estimation of biomass abundance and the associated uncertainties, the nature of supplementary biologi cal data that are required for interpretation of acoustic information, use of the results, funding of survey programmes and recommendations for considerations in implementation of fishing-vessel executed deep-water acoustic surveys.