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Effective parturition hastening method for hybrid snakehead

A technology of hybrid snakehead and induction of labor, applied in fish farming, application, climate change adaptation, etc., can solve problems such as low fertilization rate

Active Publication Date: 2017-05-10
PEARL RIVER FISHERY RES INST CHINESE ACAD OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the male snakehead can be in estrus for many times, and each male broodstock can be induced 3-4 times in a row, but the fertilization rate of the first induced labor is generally low, only about 30%, and the fertilization rate can only increase to 70% in the 2nd or 3rd time. above

Method used

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  • Effective parturition hastening method for hybrid snakehead
  • Effective parturition hastening method for hybrid snakehead
  • Effective parturition hastening method for hybrid snakehead

Examples

Experimental program
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Effect test

Embodiment 1

[0021] In April 2016, this method was used in a hybrid snakehead breeding farm in Xingtan Town, Shunde District, Foshan City, Guangdong Province to conduct a hybrid snakehead production test. On the 18th, 230 parent fishes (average body weight 0.5 kg) were selected from the same batch of mature broodfishes, and the first injection was given at 20:00, with an average injection of 2 μg LRH-A2 (Ovitropin 2 for aquatic products) to each broodstock. No., the prescribed dosage is to use when calculating the total amount of medicine according to the total weight of the parents, and to increase or decrease as appropriate according to the body weight and maturity of the fish during injection, the same below). At 8 o'clock on the 19th, the second injection was started, with an average dose of 400IU HCG and 6μg LRH-A2 per fish. After the injection, the broodstock was placed in the ovary, and the first and second injections were injected intramuscularly at the base of the dorsal fin.

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Embodiment 2

[0028] In May 2016, this method was used in a hybrid snakehead breeding farm in Sanjiao Town, Zhongshan City, Guangdong Province to conduct a hybrid snakehead production test. On the 12th, select 120 parent fishes (average body weight 0.5kg) of Channa nana in the broodstock pond, inject the first needle and the second needle respectively at 20 o'clock in the evening and at 8 o'clock the next day, and the injection dose is the same as in Example 1. After the injection, the broodstock of the channa was placed in the ovaries, and then 120 parent fishes of the channa (average body weight 1.5kg) were selected, and the injection was started at 14:00, with an average dose of 180IU HCG and 2.4μg LRH-A2 per fish. After the injection, the male parent of the snakehead was put into the producing ovary and paired with the female parent of the spotted snakehead. After covering it, the ovary-producing attachment was removed and kept quiet. After 9:00 am on the 14th, check and count the spawn...

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Abstract

The invention discloses an effective parturition hastening method for a hybrid snakehead. The method comprises the first step of selecting a parent fish; the second step of conducting female parent parturition hastening; the third step of conducting male parent parturition hastening. By adopting the parturition hastening method, a male parent snakeheaded fish can conduct continuous parturition hastening for 4-5 times, the average spawning rate is 85% or above, the fertility rate is 75% or above, and the female parent disability rate is reduced to 10% or less.

Description

technical field [0001] The invention belongs to the technical field of fish reproduction, and in particular relates to a high-efficiency induced spawning method in the breeding of hybrid snakeheads. Background technique [0002] Channa is an important freshwater high-quality economic fish in my country. It has the characteristics of less bone spurs, fresh and tender meat, and rich nutrition. , the national annual output exceeds 510,000 tons, and it is the eighth largest freshwater aquaculture species in my country. [0003] The main species of snakeheads in my country are black snakeheads and spotted snakeheads, but the breeding is mainly based on black snakeheads and hybrid snakeheads. At present, hybrid snakeheads are mainly cultivated in the Jiangnan and South China regions of my country. The hybrid snakehead, which takes snakehead as the female parent and black snakehead as the male parent, is a species with a large amount of breeding at present. There is a big differe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/10
CPCA01K61/00Y02A40/81
Inventor 赵建陈昆慈朱新平罗青
Owner PEARL RIVER FISHERY RES INST CHINESE ACAD OF FISHERY SCI
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