Effect of light intensity and feed density on feeding behaviour,growth and survival of larval sablefish Anoplopoma fimbria |
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| Authors: | Jonathan S F Lee Lyle L Britt Matthew A Cook Thomas H Wade Barry A Berejikian Frederick W Goetz |
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| Institution: | 1. Environmental and Fisheries Sciences Division, Northwest Fisheries Science Center, National Marine Fisheries Service, NOAA, Port Orchard, WA, USA;2. Resource Assessment and Conservation Engineering Division, Alaska Fisheries Science Center, NOAA, Seattle, WA, USA |
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| Abstract: | We studied the effects of light intensity on larval activity, feeding behaviour, 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 12–42 lux. In another experiment in larger tanks, behavioural observations showed that larvae fed poorly under light brighter than 800 lux but fed better at lower light intensities, depending on tank type. In a separate experiment, where live feed densities were varied between 2.5 and 17.5 rotifers per mL of tank water, surviving biomass and dry weight increased with higher feed densities. These experiments help refine methods for rearing larval sablefish by demonstrating effects of light intensity and feed density on larval performance. |
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| Keywords: | light intensity feed density larvae sablefish lux |
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