The effect of fish stocking density on the growth of California halibut (Paralichthys californicus) juveniles

The ability to raise California halibut (Paralichthys californicus) at a relatively high density, thus maximizing culture area usage, is of particular importance for future commercial operations. The effect of stocking densities between 100 and 300% of coverage area (PCA) on growth of juvenile (11.6 g) fish was tested in experiments that lasted 8 to 10 weeks. The experiments were carried out in a recirculation system in small rectangular tanks and raceways with water depths under 6 cm. It was found that maximum fish growth was achieved for fish stocked initially at 100% PCA. The results showed that California halibut can be grown in shallow tanks and raceways at a relatively high stocking density without significantly compromising growth rate and survivability.