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Indoor high-density breeding method of current-year fingerlings of scatophagus argus

A breeding method and technology of money fish, applied in fish farming, application, climate change adaptation, etc., can solve the problem of low proportion of pulling nets into the net, uneven specifications and quality of sea-caught fry, and unpredictable pool storage To achieve the effects of strong adaptability to environmental stress, reduction of indirect cost of breeding, and easy acceptance and promotion

Active Publication Date: 2018-07-27
SHANGHAI FISHERIES RES INST
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0003] However, the seedlings of the golden fish are almost completely dependent on sea-catch at present, and the size of the sea-catch is uneven (0.5-2.0cm). Due to the environmental pollution of the fishery and the influence of sea-fishing for years, the supply of sea-catch seedlings is unstable, and farmers cannot obtain batches of fish of the year. The current solution is to transfer sea-caught seedlings of different specifications to ponds for temporary breeding and standardization. After they grow to a certain size, they will be screened by pulling nets, and fish species with uniform specifications will be selected for breeding.
This method has some disadvantages: 1) The specifications and quality of sea-caught seedlings are uneven, and the amount of storage in the pond cannot be estimated during the temporary cultivation process, and the guarantee of normal aquaculture production is poor; During the operation of net screening, it is easy to cause mechanical damage to seedlings, the survival rate is discounted layer by layer, and the loss is large; 3) the money fish clusters and has strong mobility, and the proportion of pulling the net into the net is low, requiring multiple operations of pulling the net, which is not only time-consuming and manpower, and low production efficiency
[0004] In 2017, the Shanghai Fisheries Research Institute achieved a breakthrough in the indoor artificial breeding technology of golden fish, and it has been able to obtain seedlings of golden fish in batches. There is a gap in fish fingerling farming technology in the current year, solving the technical bottlenecks and short supply problems of the current year's fish fingerlings, and providing farmers with consistent and stable specifications and good vitality of the year's money fish fingerlings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The indoor high-density breeding method for fish fingerlings of the present invention, the technical scheme is composed of breeding preparation, counting of seedlings, transporting and putting in seedlings, bait management, water quality management, and catching by pulling nets, and specifically includes the following steps :

[0033]Breeding preparation: Before the breeding starts, prepare indoor rectangular cement ponds as the fish breeding ponds and cage storage ponds of the year, with an area of ​​16-20m 2 , before use, use 25-30ppm of bleaching essence to soak in the pool full of water for 1-2 days. After cleaning, soak in the pool full of clean water and aerate to remove residual chlorine. After cleaning again, dry it for more than 2 days for later use. Prepare 20-mesh sieve tulle. The completed net cage is used for counting and temporarily raising juvenile fish. The size of the net cage is 90cm×60cm×40cm. The water for breeding is estuary water. The water tempera...

Embodiment 2

[0040] Using the method of Example 1, the Fengxian Scientific Research Base of the Shanghai Fisheries Research Institute carried out indoor high-density breeding of the fish fingerlings of the year in No. 4 shed 407 pool in 2017. The initial specifications: body length 1.68±0.23cm, weight 0.34±0.13 g, the initial stocking density was 375 fish / m 2 , the breeding cycle is 181 days, and the species specifications at the time of catch: body length 6.67±0.54cm, weight 15.49±3.69g, breeding survival rate 85.8%, bait coefficient 1.52.

Embodiment 3

[0042] Using the method of Example 1, the Fengxian Scientific Research Base of the Shanghai Fisheries Research Institute carried out indoor high-density breeding of the fish fingerlings of the year in No. 4 shed 408 pool in 2017. The initial specifications: body length 1.68±0.23cm, weight 0.34±0.13 g, the initial stocking density was 312 fish / m 2 , the breeding cycle is 181 days, the fish species specifications at the time of catch: body length 6.40±0.99cm, weight 13.60±6.45g, breeding survival rate 80.5%, bait coefficient 1.76.

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Abstract

The invention relates to the field of aquaculture, in particular to an indoor high-density breeding method of current-year fingerlings of scatophagus argus. The indoor high-density breeding method consists of breeding preparation, fingerling pulling net counting, fingerling transportation and delivery, bait management, water quality management and pulling net capture and adopts an indoor cement pool for high-density breeding of the current-year fingerlings of the scatophagus argus; aquaculture water is estuary brackish water, artificially-bred fingerlings that are converted to eel feed are transported to the indoor cement pool, the specification body length is 1.3-1.5 cm, and the breeding density is 300-400 / m<2>; the eel feed is fed to the fingerlings with a respective body length of lessthan 3 cm, and floating pellet feed is fed to the fingerlings with a respective body length of 3 cm; during breeding, sewage suction and bottom cleaning are performed on time, and water change and pool turnover are performed timely; as for the current-year fingerlings with a respective specification body length of more than 4-5 cm, the pulling net capture can be performed to transfer to the pool for breeding. The indoor high-density breeding method provided by the invention has the beneficial effects that the survival rate after indoor high-density breeding for 181 days is 80-85 percent, and the technical blank of indoor intensive and large-scale production of the current-year fingerlings is filled up.

Description

technical field [0001] The invention relates to the field of aquaculture, in particular to an indoor high-density culture method for fish species of money fish in the current year. Background technique [0002] Money fish (Scatophagus argus), also known as golden drum fish. It belongs to the class of ray-finned fishes, the order of perciformes, the suborder of spiny fishes, the family of money fishes, and the genus of money fishes. my country is distributed from the southern part of the East China Sea to the South China Sea and the Beibu Gulf. The money fish is delicious and has ornamental value because of the money spots on the body surface. It is a kind of rare edible and ornamental fish. Due to its strong environmental adaptability and disease resistance, money fish can not only grow and develop in seawater and brackish water, but also suitable for freshwater farming. In recent years, it has become an important breeding species in the southern coast of my country. [0...

Claims

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Application Information

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IPC IPC(8): A01K61/10
CPCA01K61/10Y02A40/81
Inventor 徐嘉波刘永士施永海邓平平张海明谢永德蒋飞
Owner SHANGHAI FISHERIES RES INST
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