Artificial propagation method for advanced fry of yellow catfish

A technology for artificial reproduction and yellow catfish, applied in fish farming, application, climate change adaptation and other directions, to achieve the effects of improving survival rate, facilitating debonding, and simple setting method

Active Publication Date: 2008-09-17
沈阳华泰渔业有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the shortcomings of the existing artificial propagation technology of yello

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0006] When the water temperature reaches 22-26°C, select parent fish among the cultivated yellow catfish. The selection criteria are: sexually mature yellow catfish over 3 years old, the female tail weighs more than 60 grams, the appearance is that the abdomen is swollen, and the head is erected upwards. The outline of the ovary is obvious; the tail weight of male fish is more than 125 grams, and the male and female ratio is 3:1.

[0007] Fish nests are set in the spawning pond with a water depth of 0.5-1.2 meters. The setting method is: spread sand on the bottom of the drum with a thickness of 1-5 cm; the drum is a plastic drum or an iron drum with a diameter of 20 ~ 50 cm, height 20 ~ 60 cm, the sand needs to be sieved through a 20 ~ 40 mesh sieve. Then the selected broodstock is injected with oxytocin hormone, put into the spawning pond, and the fish density is 1 to 2 groups of broodstock per square meter, and each group of broodstock is placed with a fish nest. The injec...

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Abstract

The invention relates to an artificial propagation method of yellow catfish fry, which is characterized in that: sexually mature yellow catfish over three years are chosen as the parent fishes; the female and male ratio is 3:1; a plurality of barrels are arranged in a spawning pond as fish nests; parent fish density in the spawning pond is 1 to 2 groups/m2; each group of parent fishes uses a barrel; the sand with a thickness ranging form 1cm to 5cm is arranged at the bottom of the barrel for the debonding of fish eggs; in spawning season, exogenous hormone is injected to the basal behind the dorsal fins of the parent fishes to induce ovulation and spermiation; an inversed conical container with smooth inner wall is used as the hatching barrel; fertilized eggs are arranged in the hatching barrel for hatching in flowing water; the dissolved oxygen in the water of the hatching barrel is larger than 5.5 mg/L; when hatching is over, fry is arranged in a cement pool for temporary rearing for 40 to 70 hours, then the fry is packaged in plastic bags with water and oxygen. The artificial propagation method of yellow catfish fry has the advantages that, well developed yellow catfish fry can be acquired; the operation is simple; the utilization rate of parent fishes is high; scale production of yellow catfish fry can be realized, and the invention has significant meaning for the intensive culture of yellow catfish.

Description

technical field [0001] The invention relates to artificial propagation of freshwater fish, and relates to a method for large-scale artificial propagation of peliotus fry. Background technique [0002] Yellow catfish is widely distributed in my country, and is welcomed by farmers and consumers because of its strong adaptability, fresh and tender meat, and high economic value. Due to the difficulty in supplying wild fry, aquatic workers have done more research on artificial breeding of yellow catfish in recent years. The existing artificial reproduction technology of yellow catfish has been studied in detail in broodstock selection, fish nest setting, hatching method and temporary raising, and a relatively simple large-scale cultivation method of yellow catfish is provided. However, this method has disadvantages such as low utilization efficiency of broodstock, large amount of injected drugs, high cost, more impurities in the hatched fry, low hatching survival rate, etc., and...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 高征崔杰
Owner 沈阳华泰渔业有限公司
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