Using UWTV surveys to assess and advise on Nephrops stocks

This report describes the use of UWTV surveys in the assessment and provision of management advice for Nephrops stocks. This includes (i) the history of underwater photography and the development of Nephrops-specific surveys; (ii) the equipment used and the utilization of various survey designs; (iii) Nephrops burrow identification and quality control; (iv) caveats and uncertainties associated with the methodologies; (v) the statistical analyses used and the incorporation of survey results into the assessment process; and (vi) the further utilization of the survey data beyond the primary task.