Fry rearing method of large yellow croakers in earth ponds and net cages

A method for cultivating large yellow croaker and a technology for large yellow croaker, which are applied to the field of cage cultivation in soil ponds for large yellow croaker fry, can solve the problems of germplasm degradation of cultured species, decline in breeding economic benefits, decline in breeding output, etc., and achieve reduction of water quality deterioration, good application prospects, The effect of improving the survival rate

Inactive Publication Date: 2016-02-24
INST OF OCEANOLOGY & MARINE FISHERIES JIANGSU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] At present, due to the phenomenon of grouping of fishing rafts in cage culture and the low management level, the pollution of aquaculture water is relatively heavy, which constitutes serious pollution to the entire open water environment. The total nitrogen, total phosphorus, and inorganic phosphorus in the sediment are also relatively high. Habitat damage is serious, resulting in the degradation of the germplasm of cultured species, the occurrence of diseases from time to time, the decline in aquaculture production, the decline in the economic benefits of aquaculture, and the growth of large yellow croaker fry in semi-open water is not as bright as earthen pond fry
[0010] However, in earthen pond fry, there are also characteristics that the amount of bait in the water body is unstable during the early cultivation process, it is easily affected by the weather, the specifications of the cultivated fry are not uniform, and it is difficult to catch them.

Method used

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  • Fry rearing method of large yellow croakers in earth ponds and net cages
  • Fry rearing method of large yellow croakers in earth ponds and net cages
  • Fry rearing method of large yellow croakers in earth ponds and net cages

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Pond cleaning of silt, water injection (15 days in advance) and transformation:

[0033] ① Pond dredging and disinfection: an important measure to prevent diseases and reduce epidemic outbreaks. After dredging, sterilize with 100 kilograms of quicklime per mu, and after five days, set a 40-mesh filter at the water inlet of the pond to enter the water;

[0034] ②Pond reconstruction: In order to facilitate the placement of the cages later, it must reach an appropriate depth, and the water depth at the place where the cages are placed must reach 4.0m;

[0035] ③Auxiliary facilities setting: use bamboo poles with a diameter of 100mm and (specification) aluminum tubes for erecting cages and oxygenation pipelines and supporting microporous oxygenation plates with a diameter of 80cm;

[0036] (2) Place cages (one week in advance):

[0037] Placement of net cages: When setting up net cages, insert four moso bamboos into the mud at the four corners, fix the four corners of...

Embodiment 2

[0048] (1) Pond cleaning of silt, water injection (18 days in advance) and transformation:

[0049] ① Pond dredging and disinfection: an important measure to prevent diseases and reduce epidemic outbreaks. Disinfect with 20 kilograms of bleaching powder (containing more than 25% of available chlorine) per mu after dredging, and after five days, set a 40-purpose filter screen at the water inlet of the pond to feed water;

[0050] ②Pond reconstruction: In order to facilitate the placement of the cages later, it must reach an appropriate depth, and the water depth at the place where the cages are placed must reach 4.0m;

[0051]③Auxiliary facilities setting: use bamboo poles with a diameter of 100mm and (specification) aluminum tubes for erecting cages and oxygenation pipelines and supporting microporous oxygenation plates with a diameter of 80cm;

[0052] (2) Place cages (one week in advance):

[0053] Placement of net cages: When setting up net cages, insert four moso bamboos...

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Abstract

The invention relates to a fry rearing method of large yellow croakers in earth ponds and net cages. The fry rearing method comprises following steps: mud clearing in ponds, water filling and reconstruction; placing net cages; putting fries; water quality management and control measurements; and rearing management. The fry rearing method of large yellow croakers in earth ponds and net cages has following beneficial effects: waste of formula feed is greatly decreased; water quality deterioration and diseases are reduced; fish is fed in a centralized mode and conveniently observed so that abnormity is promptly observed; reared fish is in the same specification so that survival rate is greatly increased; fish is easily caught and fries are not damaged; fish looks more colorful than ones reared in a bay and shows higher vitality; and a good application prospect is obtained.

Description

technical field [0001] The invention belongs to the field of large yellow croaker cultivation, and in particular relates to a method for cultivating large yellow croaker fry in an earthen pond cage. Background technique [0002] Large yellow croaker is one of the main economic fish in my country's oceans, and it is also an important economic breeding species in my country. [0003] At present, the breeding methods for seed cultivation mainly include indoor cement pond seedling cultivation and transfer to cage culture in the bay (large-sized seedlings are more than 5 cm), and earthen pond seedling cultivation. [0004] Indoor cement pond farming: [0005] Cultivation of larvae and juveniles indoors, cultivation density: 24,000 fish / m at the larvae stage 3 ~0.8 million tails / m 3 ; 6,000 fish / m in the juvenile stage 3 , 20,000 to 1,000 juvenile fish over 45 days old / m 3 . Daily management: continuous inflation of dissolved oxygen above 5mg / L. [0006] Cage seedling culti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00A01K63/04
CPCA01K61/00A01K63/042Y02A40/81
Inventor 吴国均祝斐张曹进刘海林张志勇
Owner INST OF OCEANOLOGY & MARINE FISHERIES JIANGSU
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