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Effect of light intensity and feed density on feeding behaviour, growth and survival of larval sablefish Anoplopoma fimbria
Author(s) -
Lee Jonathan S F,
Britt Lyle L,
Cook Matthew A,
Wade Thomas H,
Berejikian Barry A,
Goetz Frederick W
Publication year - 2017
Publication title -
aquaculture research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.646
H-Index - 89
eISSN - 1365-2109
pISSN - 1355-557X
DOI - 10.1111/are.13269
Subject(s) - biology , larva , light intensity , aquaculture , biomass (ecology) , zoology , fimbria , fishery , fish <actinopterygii> , ecology , escherichia coli , biochemistry , physics , gene , optics
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.