Upflow shellfish larva cultivating device and method

Abstract

The present invention provides high density upflow shellfish larva cultivating device and method. The cultivating device is one barrel with cylindrical upper part and conic lower part, and has bait and sea water canal inserted from the top into the bottom, filtering drum with outside thin silk net in the upper part, draining pipe with one end connected to the filtering drum and the other end stretched outside, and ventilation pipe introduced from the tip of conic part and with airstone connected. The cultivating method features the density of type-D shellfish larva 140-160 / ml, bait adding amount of 5000-15000 cell / ml.day, water flow amount of 7-10 times / day, and ventilation amount of 2-4 L / min. The present invention has raised cultivation density and survival rate.

Description

technical field [0001] The invention belongs to the shellfish seedling raising technology in the aquaculture technology, and relates to a facility and a technique for cultivating shellfish larvae on a production scale, in particular to an upwelling shellfish larvae cultivating device and a cultivation method. Background technique [0002] At present, the technological level and supporting equipment of shellfish seedlings in my country are relatively backward. The facilities for cultivating shellfish seedlings are generally large cement ponds with large water volume and low breeding density. At present, the breeding density of planktonic larvae for shellfish seedling cultivation is generally about 10 / ml. The interval time is long and the labor intensity is high; generally, the bait is directly thrown on the water surface of the pond, and the bait is uneven in the water; the amount of aeration in the water is small and uneven, which directly affects the feeding and normal grow...

AI Technical Summary

Problems solved by technology

The facilities for cultivating shellfish seedlings are generally large cement ponds with large water volume and low breeding density. At present, the breeding density of planktonic larvae for shellfish seedling cultivation is generally about 10 / ml. The interval time is long and the labor intensity is high; the bait is generally thrown directly on the water surface of the pond, and the bait is uneven in the water; the amount of aeration in the water is small and uneven, which directly affects the feeding and normal growth and development of shellfish larvae

In short, the existing shellfish seed culture facilities and technology are backward, occupying a large area, serious waste of energy, low seedling raising efficiency, and poor water cultivation environment, which is not conducive to the growth of planktonic larvae, survival rate and metamorphosis rate of shellfish seedlings. Low

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