Method for regulating natural spawning of parent fish of seriola aureovittata

Abstract

The invention provides a method for regulating natural spawning of parent fish of seriola aureovittata and belongs to the field of aquaculture. The method comprises the steps of parent fish selection,parent fish rearing, and reproductive regulation for natural spawning, wherein the step of reproductive regulation for natural spawning is regulating gonadal maturation of the parent fish and carrying out natural spawning through regulating the conditions including water temperature, a photoperiod, water flow and nutrition for parent fish rearing. According to the method provided by the invention, natural spawning of the parent fish in a culture pond can be achieved in a regulation period of 60-77 days and high-quality fertilized eggs are obtained; the spawning period can be advanced by 1-2 months in comparison with that in the natural world, and the spawning period can last up to 45-60 days; the fertilization rate reaches 90% or above; and the hatching rate reaches 70% or above.

Description

technical field [0001] The invention belongs to the field of marine fish reproduction biology, and in particular relates to a method for regulating the natural spawning of yellowtail broodstock. Background technique [0002] Mariculture is an important way to develop and utilize marine biological resources. In 2018, my country's mariculture output reached 20.31 million tons, accounting for 2 / 5 of the total aquaculture, making outstanding contributions to ensuring the supply of high-quality protein in my country. In recent years, with the steady advancement of my country's national strategies such as the construction of a strong marine country and the construction of ecological civilization, the development space of offshore mariculture has been strictly controlled, and the active development and utilization of new space in deep and deep seas has become a strategic choice for the construction of my country's marine fishery power. [0003] In terms of deep-sea aquaculture expl...

AI Technical Summary

Problems solved by technology

However, the large-scale breeding technology of yellowtail amberjack seedlings has not yet been broken in the world. The main reason is that it is difficult to obtain fertilized eggs and the quality is unstable, which has become a bottleneck restricting the sustainable development of yellowtail yellowtail breeding industry.

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