The study at EWOS Innovation in Dirdal was conducted as collaboration between EWOS Innovation and Rogaland Research. Tests of the effects of dissolved oxygen (DO) deficit on salmon post-smolt are a vital part of the on-going R&D project involving EWOS Innovation – OxSeaVision (OSV) – RF. The reported study was carried out at high summer temperature (mainly ca. 15 °C) – unlike the formerly reported study conducted at 8 – 9 °C.EWO