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Leiocassis longirostris intensive artificial propagation method

A technology of artificial breeding and long-beaked beetle, applied in the field of freshwater fish farming, can solve the problems of ineffective resource protection measures, difficult to catch the long-beaked beetle, sharp drop in natural output, etc., so as to reduce direct economic losses and avoid serious ecological problems. The effect of destroying and avoiding the destruction of natural ecology

Inactive Publication Date: 2011-04-13
王国平
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AI Technical Summary

Problems solved by technology

It is suitable for aquaculture in most waters, but due to ineffective resource protection measures in recent decades, excessive fishing, environmental pollution and excessive slaughter of male fish, the natural production has dropped sharply
It is very difficult for fishermen to catch long-snouted squid now.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: a kind of method for large-scale artificial propagation of catfish, comprising:

[0025] (1) Broodstock selection: select individuals with a body weight of more than 2.5kg, smooth body surface, no disease, no injury, strong physique, and sexually mature appearance as parents, and the ratio of female fish to male fish is female: male = 1: 1.2. The genital process of a sexually mature female fish is only about 0.5m long, the hole is wide and round, the color is ruddy, and the abdomen is swollen. When the fish is caught by hand, the abdomen is upward and the obvious ovarian outline can be seen. The abdomen is soft and elastic when pressed by hand; The genital process of sexually mature male fish is longer and pointed, about 1cm long;

[0026] (2) induced labor:

[0027] a. Spawning pool construction: In general spawning pools, construct spawning caves imitating ecology, within 100m 2 30-50 spawning caves are set in the spawning pool, and the spawning caves ...

Embodiment 2

[0038] Example 2: The dosage of oxytocic drugs is LRH-A per kilogram of fish body weight 2 30 μg and 1 PG; the rest are the same as in Example 1.

Embodiment 3

[0039] Embodiment 3: The dosage of the drug is to use LRH-A per kilogram of fish body weight 2 40 μg and 1.5 PGs; the rest are the same as in Example 1.

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PUM

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Abstract

A Leiocassis longirostris intensive artificial propagation method, comprises parent fish selection, induced spawning, hatching. According to the present invention, individuals of Leiocassis longirostris whose bodies weigh more than 2.5 kilogram and body surfaces are smooth as parents, and the Leiocassis longirostris parents are disease-free and injurt-free, healthy, and appear sexually mature are selected. The ratio of female fishes and male fishes is 1:1 to 1:1.5. The induced spawning includes the installation of a specific oviposition pool and an oviposition-nest, preparation of oxytocic in different doses, and spawn taking. The hatching includes the determination of a hatching groove and the hatching condition. The method of the present invention saves manpower, material resources and financial resources, and can produce fry by bulk according to a plan in order to satisfy the requirements for fry of different customers, makes production and development be unified; and avoids severe destruction of nature ecology caused by killing the male parents in a large number.

Description

technical field [0001] The invention relates to a method for cultivating freshwater fish, and further refers to a method for large-scale artificial propagation of long-snout catfish. Background technique [0002] Long-snouted catfish, taxonomically belong to Siluriformes, Osmanthidae, and Catfish genus. It is named because its snout is longer than other fishes. It is commonly known as "Jiang Tuan", "Fat Tuo" and "Bai Duan". Long-snout catfish is mainly distributed in the Yangtze River Basin and the lower reaches of major tributaries, and Dongting Lake is one of the main distribution areas. The meat content of long-nosed catfish is as high as 70%, and 13 of the 18 amino acids are higher than grass carp, especially the glutamic acid and aspartic acid contents are as high as 12.05% and 8.51%, respectively. Therefore, the meat of long-snout catfish is tender and delicious, and it is a good nutritional product suitable for all ages. In Sichuan, it is also known as "the first fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 杨述奇徐德平贾建成李文杨术平刘勇万铁海
Owner 王国平
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