METHOD FOR REPRODUCTION IN CRUSTACEAN (KING CRAB)

摘要

FIELD: pisciculture, aquaculture. SUBSTANCE: one should conduct roe females' catching at the final embryonic stage 5-10 d before larvae output, then they should be transported to incubation place for the period not exceeding 15 h at constant air supply, larvae are grown in zoea stage of I, II, III and IV stages, glaucotoe and the first stage of fry stage in one and the same tank with closed cycle of water supply at density of 50 pc/l, not more and water flow velocity of 1-2 l/min, not less. At zoea stage since the first day after birth and during the next 8-10 d water medium is additionally supplemented with suspension of diluted standard fodder for sea shrimps at the quantity of 50 ml/10000 larvae. Density of plankton content is chosen depending upon a stage (zoea IV). For I, II, III zoea stages fodder is given twice daily, and for IV stage - thrice daily. At raising at glaucotoe stage one should put down substrate beforehand, raising is carried out at water flow velocity of 1 l/min and density of 25 pc/l, zooplankton content density in water medium should be decreased up to 5 pc/d - once, at the first fry stage water temperature should be increased within the limits of 10-15 C, water flow velocity is increased up to 5 l/min, as fodder one should use shrimps and mussels' stuffing at the ratio of 3 : 1 at food coefficient of 3. Reproduction process is finished by transportation and release of fry into open sea. The innovation enables to regulate reproduction process in king crab due to obtaining sufficient quantity of viable fry. EFFECT: higher efficiency of reproduction. 5 cl, 2 tbl