FIELD: pisciculture.
SUBSTANCE: suspension prepared from 250 ml seawater and a feed additive containing dry feed yeast Rhodotorula benthica in the amount of 54 wt.%, sodium chloride in the amount of 6 wt.%, whole protein in the amount of 35 wt.%, and astaxanthin in the amount of 5 wt.% is introduced into the growing container. The additive is taken as calculated for 0.75 to 1.5 g Rhodotorula benthica for 1 specimen at a concentration of 30,000 to 60,000 yeast cells per 1 ml water. The resulting suspension is introduced into the growing container maintaining an average stocking density of 1 specimen/ml water. Before settling of the juvenile specimens, the larvae are fed 3–4 times a day the suspension with a feed additive containing yeast for 1 specimen at the stages of development Pluteus I in the amount of 0.75 g, and at the stages of development Pluteus II and Pluteus III 1 to 1.25 g. The settled young specimens are fed 2–3 times a day the suspension with a feed additive containing yeast in the amount of 1.25 to 1.5 g for 1 specimen, filtered homogenate of attached diatomic algae, and powdered Laminaria. For 1 mil specimens smaller than 0.1 cm, homogenate is taken in the amount of 50 g, and for specimens with a size of 0.1 to 1 cm, homogenate is taken in the amount of 30 g and powdered Laminaria in the amount of 50 g.
EFFECT: high survival rate of larvae and juvenile specimens of Strongylocentrotus Intermedius.
1 cl, 2 tbl
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Authors
Dates
2022-12-28—Published
2021-11-22—Filed