The invention relates to a bionic freshwater white shrimp parent breeding method, belonging to the technical field of shrimp parent breeding method. The method includes the following steps: parent shrimp laying eggs and hatching in seawater; larval desalination: gradually desalinating the larval aquaculture water body to the end point of salinity < 1.5, and culturing to adult shrimp under conventional production conditions; salting of adult shrimp: gradually salting the aquaculture water body of adult shrimp to the salinity of the water body The reserve parent shrimp culture: the sub-adult shrimp as the reserve parent shrimp continued to be cultured; the reserve parent shrimp selection: the reserve parent shrimp with no limbs and strong vitality was selected as the reserve parent shrimp. Compared with the traditional breeding method of Penaeus vannamei, the selected Penaeus vannamei can better adapt to various breeding environments, so as to ensure that the survival rate of Penaeus vannamei is high, its growth speed is fast and its stress resistance is strong. It can also maintain the reproductive performance of Penaeus vannamei, and the desalinated salted shrimp can be used as parent shrimp, which has good reproductive capacity.
【技术实现步骤摘要】
仿生淡水南美白对虾亲虾选育方法
本专利技术涉及对虾亲虾选育方法,特别是涉及一种仿生淡水南美白对虾亲虾选育方法。
技术介绍
天然野生南美白对虾属于回游动物,生活史中包含淡水环境,其主要育肥环境为盐度变化巨大(0~68‰)的南美泻湖系统,所以野生南美白对虾可适应于0~45‰盐度的各种水体养殖。由于当前所有南美白对虾亲虾选育过程都在盐度大于28‰天然标准海水中进行,如图1所示,没有经过淡水过程,导致选育后的南美白对虾对天然海水具有一定的依赖性,难于适应淡水及咸淡水环境,许多淡水环境养殖前必须在淡水中添加海水才能保证一定的成活率,不仅造成养殖成本高,无法在远离沿海的内陆淡水环境,同时也可能导致养殖环境受海水污染。
技术实现思路
基于此,有必要针对上述问题,提供一种仿生淡水南美白对虾亲虾选育方法,采用该方法选育出的亲虾,既能保持较好的繁殖能力,又可解决选育后的南美白对虾对天然海水具有依赖性的缺陷。一种仿生淡水南美白对虾亲虾选育方法,包括以下步骤:亲虾产卵孵化:在海水中使亲虾产卵,并进行孵化,得到幼体;幼体淡化:逐步淡化幼体养殖水体,至水体盐度终点≤1.5‰,并在水体盐度≤1.5 ...
【技术保护点】
1.一种仿生淡水南美白对虾亲虾选育方法,其特征在于,包括以下步骤:亲虾产卵孵化:在海水中使亲虾产卵,并进行孵化,得到幼体;幼体淡化:逐步淡化幼体养殖水体,至水体盐度终点≤1.5‰,并在水体盐度≤1.5‰的淡水环境中将幼体养殖至长成亚成虾;亚成虾咸化:逐步咸化亚成虾养殖水体,至水体盐度为28~35‰;后备亲虾养殖:将上述经咸化的亚成虾作为后备亲虾继续养殖;预备亲虾选择:选取上述后备亲虾中无断肢、活力强个体作为预备亲虾。
【技术特征摘要】
1.一种仿生淡水南美白对虾亲虾选育方法,其特征在于,包括以下步骤:亲虾产卵孵化:在海水中使亲虾产卵,并进行孵化,得到幼体;幼体淡化:逐步淡化幼体养殖水体,至水体盐度终点≤1.5‰,并在水体盐度≤1.5‰的淡水环境中将幼体养殖至长成亚成虾;亚成虾咸化:逐步咸化亚成虾养殖水体,至水体盐度为28~35‰;后备亲虾养殖:将上述经咸化的亚成虾作为后备亲虾继续养殖;预备亲虾选择:选取上述后备亲虾中无断肢、活力强个体作为预备亲虾。2.根据权利要求1所述的仿生淡水南美白对虾亲虾选育方法,其特征在于,所述亲虾产卵孵化步骤中,控制海水盐度为28~35‰。3.根据权利要求1所述的仿生淡水南美白对虾亲虾选育方法,其特征在于,所述幼体淡化步骤中,按照2~5‰/天的速度添加淡化用水降低水体盐度,且所添加的淡化用水的盐度≤0.5‰。4.根据权利要求1所述的仿生淡水南美白对虾亲虾选育方法,其特征在于,所述淡化步骤中,在淡水环境中幼体养殖时,满足常规南美白对...
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