Two experimental assays to produce biomass of Artemia franciscana (Anostraca)

Abstract

Two experimental aSsays were done lo calculate the biomass of Artemia franciscana produced in 15 and 13 day8, respectively. Experimental assay 1) three sets of three aquana had 20 1 of brackish water (20 %) and 6 nauplius/ml each. One had dr Spirulina as food source, the other two sets had fertilizers: chicken manure and "fosforin", and Uve Tetraselmis a foot source. Te pH varied: 7.3-8.0, temperature (T oC) varied: 25.5·33.0, and oxygen (02 mgl) vaned: 4.5 - 6.0 Te obtained furcal length was from 6.0 mm Lo 9.5 mm. Te mortality rate was between 95.7% and 98.9%. Biomass was between 13.0 g and 36.2 g in 20 l. Experimental 8&8y 2) hre sets of three concrete tanks had 1201 of brackish water(20L) and 1 nauplius/ml each. They had the same food source as e8say (1), except that tetraselmis was no used. The pH W88: 7.5 - 9.0, T oC: 25.5 - 35.0, and 02 mgl: 0.5 - 3.4. Furcal length wa8 8.7 m to 10.1 mm. The mortality rate was 89.7% - 96.5%. Biomass was 41.9 g - 86.5 g in 120 l. Values higher than 0.624 mg/l of ammonia were lethal. Spirulina, as a foad item, gave the best results.