Sentences with phrase «volume backscattering»

To quantify krill biomass and distribution we used: an integrated MOCNESS [17] for estimates of krill size and acoustic target strength; dual EK - 60 fisheries echosounders (38 and 120 kHz, Kongsberg - Simrad) calibrated according to [18] and mounted on a zodiac for fine scale (100 km) measurements of acoustic volume backscattering; and the ADCP echo intensity to define the meso - scale (101 km) geographic extent of the krill distributions.