Method for breeding allogynogenetic crucian carp fry at low temperature

Abstract

The invention discloses a method for breeding allogynogenetic crucian carp fry at a low temperature. The method comprises the following steps of preparing a male and female parent fish dedicated culture pond, selecting and breeding male and female parent fishes, carrying out hasten parturition on the male and female parent fishes, enabling the male and female parent fishes to lay eggs and be fertilized, enabling fertilized eggs to unstick, hatching the fertilized eggs, demolding and breeding the fertilized eggs into small fry, and breeding the small fry into large-size allogynogenetic crucian carp summer flower fry by sending the small fry into the culture pond. According to the method disclosed by the invention, high-quality allogynogenetic crucian carp fry can be bred when the temperature is low in Spring, and the emergence rate and the survival rate of the allogynogenetic crucian carp fry are very high; the production demands of the allogynogenetic crucian carp fry can be ensured, and the economic benefit of an allogynogenetic crucian carp breeding user can be greatly increased; the sustainable development of an allogynogenetic crucian carp breeding industry and the whole ecological benefit, the economic benefit and the social benefit of a fish farming industry can be greatly increased.

Description

technical field [0001] The invention relates to a method for breeding heterogeneous gibel carp fry, in particular to a method for breeding heterogeneous gibel carp fry at low temperature. Background technique: [0002] The method of conventional seedling raising of heterogeneous gibel carp is: (1), artificial seedling raising is usually carried out in the circular automatic hatching ring road nursery pond at the beginning of April. In this season, the weather is changeable and the water temperature is unstable, which can easily cause a large number of fish fry to die. The causes of death are as follows: 1. The daytime temperature is 17°C-18°C, and the water temperature drops to 16-17°C at night. When the fry just emerge from the membrane, the drop in water temperature will cause the fry to die young. 2. When the water flow in the hatching ring is too fast, the fry will die young. 3. The density of fertilized eggs in the hatching tank is high, and the fry will die due to e...

AI Technical Summary

Problems solved by technology

2. When the water flow in the hatching ring is too fast, the fry will die

3. The density of fertilized eggs in the hatching tank is high, and the fry will die due to enzyme poisoning when they are removed from the membrane.

4. The lack of oxygen in the hatching tank when the fry start to swim horizontally will cause the fry to die

The extremely low fry emergence rate will seriously affect the production plan of heterogeneous gibel carp fry, resulting in a serious shortage of cultured heterogeneous gibel carp fry, which directly affects the breeding plans of the majority of farmers.