http://www.panoramaacuicola.com/noticias/2012/10/01/hydroacoustic_techniques_analysed_to_calculate_aquaculture_operation_biomass.html The Business Association of Marine Aquaculture Producers of Spain (Apromar), Aquaculture Technology Centre of Andalusia (Ctaqua) and the Research Institute for Integrated Coastal Zone Management (UPV) are working on a project to design technology for calculating the total biomass of fish in offshore installations. es Waakun 2.5 http://www.rssboard.org/rss-specification