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Received 10 Jun 2018 Revised 06 Oct 2018 Accepted 29 Mar 2019 The ability to produce single cell detritus (SCD) from different seaweed species, red seaweed, Gracillaria tenuistipitata and green seaweed, Enteromorpha sp. was determined, and the effects of selected SCD diet on survival rate, growth performance and reproductive characteristics of Artemia franciscana were assessed under laboratory conditions. Experiment 1 included 8 treatments with red and green seaweeds, combined with yeast fermentation at different densities (0, 104, 105, 106 cells/mL). The results showed that the density of SCD reached highest at day 7 in the treatments added 106 yeast cells/mL (88.480±2.769×106 and 100.752±2.687×106 cells/mL of red and green seaweeds, respectively). Although the density of SCD was highest at 106 yeast cells/mL, the yeast density and NH4 concentration in green seaweed fermentation were high (5-10 mg/L). Thus, the treatment of red seaweed and 105 yeast cells/mL obtained the suitable ability to harvest at day 7 and preserve SCD for feeding Artemia. In experiment 2, Artemia were fed with 5 different diets, and each diet has three replications. Commercial feed No. 0 (for shrimp postlarvae) was the control, and 4 diets in which the shrimp feed was replaced by SCD with proportion of 100, 75, 50 and 25%. Results showed that diet with 50% shrimp feed and 50% SCD showed the high survival rate and good growth performance, as well as positive effects on the reproductive characteristics of Artemia franciscana. Keywords

can tho university journal of science

Evaluating the effects of single cell detritus from red seaweed (Gracillaria tenuistipitata) and gutweed (Enteromorpha sp.) on growth of Artemia franciscana