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Use of night lights to attract food organisms into tropical marine fish cages

Use of night lights to attract food organisms into tropical marine fish cages

Aquaculture & Fisheries Management 22(2): 183-192

A 91-day cage trial was conducted with juvenile seabass, Lates calcarifer (Block), and grouper, Epinephelus trauvina (Forskal), to ascertain the capacity of kerosene pressure lamps and fluorescent electric lamps as night-lights above the cages to attract pelagic food organisms into the cage and consequently sustain the survival and growth of the cultured fish. The experiment was conducted using 1 x 1 x 1.5 m floating cages with three different net mesh sizes (1 , 13, and 19 mm) and four fish stocking densities (seabass-10, 20, 30 and 40/m3; grouper-10/m3). A positive growth response and survival was observed with seabass and to a lesser extent with grouper with increasing net mesh size and decreasing fish stocking density. At the lowest tested density of 10 fish/m3 seabass survival increased from 5.0 to 95.0% and total cage fish biomass increased from -95.1% to +56.9% with an increase in net mesh size from 1 to 19 mm over the 91-day culture trial, respectively. The results are discussed in relation to the current commercial marine finfish cage farming practices employed in Indonesia.

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Accession: 007987723

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DOI: 10.1111/j.1365-2109.1991.tb00508.x

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