Device and operation method for over-summer relay preservation of sepiella maindroni germplasm

Abstract

The invention relates to the technical field of squid breeding, and particularly relates to a device and operation method for over-summer relay preservation of sepiella maindroni germplasm. The devicefor over-summer relay preservation of sepiella maindroni germplasm comprises a breeding box; a thermal-insulation water-insulation wall is arranged in the breeding box; the thermal-insulation water-insulation wall divides the inner part of the breeding box to a squid parent spawning pond and a fertilized egg hatching pond; the box wall of the breeding box is provided with a water circulation device; the water circulation device comprises a water inlet pipe and a water outlet pipe; the water inlet pipe is connected with the water outlet pipe through a water return pipe; the water return pipe is provided with a water stop valve, a filter, a high-pressure pump, a water temperature regulator and a salinity regulating device; a floating object is arranged on the pond water surface of the squidparent oviposition pond; the floating object is penetrated by a feeding hopper; the bottom of the feeding hopper is provided with a material through tube; two sides of the material through pipe are provided with discharge pipes; and the material through pipe is provided with egg-picking attaching strips. According to the invention, the survival rate of squid breeding is ensured, so that squid fertilized eggs and larvae can smoothly live through summer.

Description

technical field [0001] The invention relates to the technical field of squid breeding, in particular to a device and an operation method for summer relay preservation of the germplasm of the squid without needles. Background technique [0002] Man's Needleless Squid ( Sepiella japonica ), commonly known as cuttlefish and order fish, belongs to the mollusca (Mollusca), cephalopod (Cephalopoda), decapoda (Decapoda), squid (Sepiidae), needleless squid ( Sepiella ). Mansoni squid was once one of the traditional "four seafood" in the East my country Sea fishing grounds in China. The highest annual output in Zhejiang Province's history once reached more than 60,000 tons, accounting for 9.3% of the province's total marine fishing output. Since the end of the 1970s, due to overfishing and destruction of spawning grounds, the output of squid in the coastal fishing grounds of Zhejiang has dropped sharply, and the fishing season has not been formed, and it is on the verge of extinct...

AI Technical Summary

Problems solved by technology

The traditional method is to purchase wild brood squid that enter Hong Kong around April every year, and after a period of breeding, use the fertilized eggs produced by the broodstock to carry out multiplication and release. This mode is extremely affected by the number of broodstock, survival rate and egg production. It is easy to cause few and unstable fertilized eggs. In addition, the acquisition of wild cuttlefish from Hong Kong is also a great damage to resources. This method of destroying first and then multiplying is extremely undesirable.

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