Method for hastening parturition of shellfishes by sterilized and neutralized sea water

• Main Authors: CAO CHEN, CAI HENGHUI, LIU GUIQIANG, XING ZUOPING, HUANG JINYONG, LI XIAODONG, WANG YONGBO, HAO YONGFANG
• Format: Patent
• Language: English
• Published: 07.01.2015
• Subjects: AGRICULTURE; ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; CHEMISTRY; FISHING; FORESTRY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HUMAN NECESSITIES; HUNTING; METALLURGY; NEW BREEDS OF ANIMALS; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRAPPING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to parturition hastening methods for shellfish products, in particular to a method for hastening parturition of shellfishes by sterilized and neutralized sea water. According to the method, outdoor sea water is sedimented in a sedimentation tank, sodium hypochlorite or bleaching powder are added for sterilization, sodium thiosulfate is used for neutralizing residual chlorine in the water, water in a nursery pond is firstly drained off during parturition hastening, the neutralized sea water is injected into the nursery pond until the sea water submerges seed shellfishes, air inflation and oxygenation are performed, the seed shellfishes are added immediately once spawning of the seed shellfishes is discovered, and the sea water is injected until the pond is filled with the sea water. The method is simple, and easy to implement. The method has the advantages of short time, high parturition hastening rate and good effect in terms of shellfish parturition hastening. The method belongs to methods for changing growing environmental conditions of the seed shellfishes, but the method is slow and gentle and does not cause intense stimulation and damage to the seed shellfishes. Indexes such as fertilized-egg hatching rate, metamorphosis rate and blood-shellfish repeating utilization factor are increased by 20% as compared with those in the prior art. The problems of shellfish source shortage and difficulty in seed breeding during shellfish product production are solved indirectly.