THE TECHNICAL FEASIBILITY OF MASS‐CULTURING Artemia salina IN THE ST. CROIX “ARTIFICIAL UPWELLING” MARICULTURE SYSTEM¹

Abstract

Of the various algae grown in the St. Croix Mariculture System, the diatom Chaetoceros curvisetus (clone STX‐167) proved to be an excellent diet for culturing Artemia nauplii and adults. The minimum cell concentration at which Artemia can efficiently remove cells has been determined and appears to be constant throughout the brine shrimp' life cycle. The cell stripping efficiency, growth rate, and survival of the different larval instar stages have been studied in function of increased stocking densities and flow rates. The results obtained in 230‐liter raceway tanks, subsequent to the initial 190‐liter tank studies, and extrapolated to a one m3 system indicate that 15 g of cysts (4/ml animal stocking density) can be converted into 8.7 kg of fresh weight adult Artemia in 14 days.

Different Ratio C/N with Sugar Beet Raffinate and Algae-Limit in Artemia franciscana (Kellogg, 1906) Diets on Growth and Reproductive Performance, Biomass Production, Proximate Compositions and Digestive Enzymes

“…In this study, the treatment of 10% algae+1.25% ra nate resulted in an FCR of 0.16 at 4 weeks with a production of 2518 g of adult Artemia per tank (1000 liters), while the control treatment showed an FCR of 0.24 with 1690 g Artemia biomass production per tank. The mixed diet of algae, rice bran, probiotic bacteria, and ra nate (with C/N around 10) contributed to a much higher yield of Artemia biomass (1.7 and 2.5/kg/m3 in the system without water exchange (Tobias et al 1979;Dobbelier et al 1980;Dhont and Lavens 1996;Dhont and Van Stappen 2003). The bacterial population that grew in the tanks may also be a source of additional nutrients (Gorospe and Nakamura 1996; Milligan et al 1980) and probiotic bacteria (Vahdat et al 2022) for the Artemia.…”