Moina normal font6/1/2023 The present work aims to use Daphnia longispina as a live food for Marsupenaeus japonicus post larva. All species had relatively high concentrations of ascorbic acid (1–16 mg g−1 dry weight) and riboflavin (20–40 μg g−1).The likely nutritional values of the microalgae, based on their biochemical composition, are discussed. Diatoms, prymnesiophytes, cryptomonads and eustigmatophytes were rich in one or both of the 20:5(n-3) and 22:6(n-3) polyunsaturated fatty acids important for marine fish larvae (5–35% total fatty acids), prasinophytes had low to moderate levels of one of the acids (4–10%) whereas chlorophytes were deficient in both acids (0–3%). Microalgal polysaccharides were variable in sugar composition, but most had high proportions of glucose (21–87%). All species had similar amino acid composition, and were rich in the essential amino acids. We have studied the biochemical composition of about 40 species of microalgae from seven algal classes to define those that may be best adapted to the Australian conditions.Microalgae varied in their proportions of protein (6–52%), carbohydrate (5–23%) and lipid (7–23%). In order to be nutritionally sufficient, microalgae must supply a balanced mixture of nutrients. Microalgae are used in mariculture as live feeds for all growth stages of molluscs, for the larval stages of crustaceans and some fish species, and for Zooplankton used in mariculture food chains.
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