The advancementof aquaculture has often been bottlenecked because of the lack of seed, butonce that bottleneck was overcome there was rapid growth. Recent examples ofadvances in hatchery technology leading to increased production are sea breamand Pangasius. Three areas contributing to the advancement of hatchery managementare: brood stock management, induced spawning and larval feeding. Formulateddiets have been developed for marine brood fish that are equal or better thanthe traditional raw fish diets. The importance of lipids and their compositionin brood fish diets, particularly n-3 HUFAs has received much attention. Thelipid composition of the brood diet is reflected in egg composition and eggquality. Protein quantity and quality in brood diets also impacts reproductivesuccess and egg quality. The use of Gonadotropin-releasing hormone agonists(GnRHa) given as an injection or a slow release implant for induced spawningis becoming more widely used. The addition of dopamine antagonists with GnRHamay not be necessary to successfully induce spawn some species of fish. Theuse of GnRHa can advance the maturation of oocytes allowing such fish to besuccessfully induced spawned. Significant advances have been made in the developmentof formulated microdiets for larval fish. Such microdiets have been used successfullywith young larvae reducing the need for live foods such as artemia. The qualityof both live foods and formulated diets has been enriched with the use of fattyacids. Not only the quantity of n-3 HUFAs added to a diet impacts larval growthand survival but the ratios of specific n-3 HUFAs has an impact. Enrichmentof live foods with amino acids can also improve larval fish growth and survival.
