Northwest Fisheries Science Center

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Document Type: Journal Article
Center: NWFSC
Document ID: 8782
Title: Effect of Light Intensity and Feed Density on Feeding Behavior, Growth, and Survival of Larval Sablefish Anoplopoma fimbria
Author: J. S.F. Lee, L. Britt, M. A. Cook, Thomas H. Wade, B. A. Berejikian, Frederick W. Goetz
Publication Year: 2017
Journal: Aquaculture Research
Volume: 48
Pages: 4438-4448
DOI: 10.1111/are.13269

We studied the effects of light intensity on larval activity, feeding behavior, growth, and survival of a candidate species for aquaculture¿sablefish (Anoplopoma fimbria). Of six light intensities ranging from 2 to 750 lux at the water surface, the greatest surviving biomass in small tanks was observed at 12 to 42 lux. Survival and dry weight were variable but tended to be highest at intermediate light intensities. In another experiment in larger tanks, behavioral observations showed that larvae fed poorly under bright light but fed better and were more active at low or intermediate light intensities (below 800 lux), depending on tank type. In a separate experiment, where live feed densities were varied between 2.5 to 17.5 rotifers per ml of tank water, surviving biomass and dry weight increased with higher feed densities. These experiments demonstrate how light intensity and feed density affect larval performance, and help refine methods for rearing larval sablefish.       

Theme: Sustainable, safe and secure seafood for healthy populations and vibrant communities
Foci: Develop research and technology to foster innovative and sustainable approaches to aquaculture.