Here are the links to some reports by ICES task forces looking at sample design, sample methods, and other relevant things:
Survey Design and Data Analysis:
http://www.ices.dk/reports/FTC/2005/WKSAD05.pdf
(summary)
Fisheries Acoustic Science and Technologies:
http://www.ices.dk/reports/FTC/2007/WGFAST07.pdf
Unaccounted Fishing Mortality:
http://www.ices.dk/reports/FTC/2005/SGUFM05.pdf
Survey Trawl Standardization:
http://www.ices.dk/reports/FTC/2007/SGSTS07.pdf
Fisheries Optical Technology:
http://www.ices.dk/reports/FTC/2007/SGFOT07.pdf
Fish Avoidance of Research Vessels:
http://www.ices.dk/reports/FTC/2007/SGFARV07.pdf
Acoustic Data from Fishing Vessels:
http://www.ices.dk/reports/FTC/2006/SGAFV06.pdf