In situ quantification of fish‐cage fouling by underwater photography and image analysis

Close-up underwater photography and image analysis were used to quantify mesh occlusion by biofouling of salmon-cage netting. This technique allows fast, non-destructive sampling of cages in situ for the determination of temporal and spatial changes in fouling. The area of net blockage can be easily determined, allowing rapid evaluation of cleaning or antifouling performance. © 1995, Taylor & Francis Group, LLC. All rights reserved.