鱼类工厂化循环水人工繁育设施装备应用研究进展

    Review of progress on fish breeding and seed production using Recirculating Aquaculture System

    • 摘要: 水产种业的高质量发展是推动养殖业发展的基础,现阶段中国鱼类人工繁育生产方式设施装备化程度低,产业大而不强,转型升级的需求迫在眉睫。该研究在文献调研整理的基础上,首先就循环水人工繁育设施装备在亲鱼产卵、鱼卵孵化、鱼苗培育等方面的研究和应用情况展开论述。相对于常规培育方式,循环水系统能够最大程度上构建出符合亲鱼交配和产卵的环境条件,养殖密度0.01~4.5 kg/m3,系统循环率9~76%/h,换水率0.7~3%/d;针对不同性质的鱼卵,介绍了国内外目前常用的孵化器主要有瓶式孵化罐、平列式孵化槽、漏斗式孵化器等,阐明了其适用对象、工作原理和主要性能表现;针对育苗和养殖系统构建需求的差异,综述了目前在循环水育苗设施装备应用研究中关注的重点和难点。其次,概述了中国鱼类人工繁育发展现状和问题,分析了循环水人工繁育技术的优势和面临的挑战。最后提出,鱼类工厂化循环水人工繁育具有较高的可行性和引领性,但是要实现产业化应用仍需要进一步开展基于品种对象的人工繁育环境构建及循环水处理、繁育过程鱼类对环境应激源的生物学响应、智能繁育装备等方面技术攻关和装备研发。

       

      Abstract: Fish seed is one of the primary input materials for the large-scale production in aquaculture industry. In this review, a systematic summary was firstly made on the artificial fish breeding, hatchery, and larval rearing using Recirculating Aquaculture System (RAS). It is much easier to keep the environment much more convenient for the parent fish to mate and spawn in the RAS, compared with traditional. Specifically, the flounder, grouper, and butterfish can successfully lay spawn in the RAS. Among them, the previous studies reported the culture density of 0.01-4.5 kg/m3, system recirculation rate of 9-76%/h, and water discharged 0.7-3%/day. In terms of the fish eggs hatching, three kinds of incubator were mainly used for the different kind of eggs. Mcdonald-type hatching jar was used for the trout, sturgeon, and seabass, all of which eggs were suspended in water. California-type incubation troughs and vertical incubators were mainly used for the salmon and catfish, of which eggs were be stationary. Similar to the Mcdonald-type hatching jar, the funnel type incubators were used for the fresh water fish, such as the big head, grass, and koi carp. Furthermore, the different requirements of the system to grow out have been summarized to evaluate the influence of the live feed, microorganism, tank size, and light condition on the fish larval rearing. Secondly, the overview has been provided for the fish breeding and seed production in China. The current large-scale artificial fish breeding and seed production were practiced either in the outdoor ponds, net cages or the flow through various systems. Most of the seed production facilities were outdated, where the control of water quality was depended only on the climate and water resources. More importantly, the production efficiency and quality of fish seed were much lower and unstable at present, leading to the less development of aquaculture. Therefore, it is very necessary to upgrade the fish breeding and seed production technology. Recirculating aquaculture can be a promising kind of land-based industrialized aquaculture, due mainly to the high production, high efficiency, strong reproducibility, and environment friendly. Because of the high controllable water quality, recirculating aquaculture can fully meet the harsh requirements for the fish breeding and seed production. Hence, a plenty of practices on the fish breeding and seed production using RAS have been carried out with the different species all over the world. Thirdly, three research fields can be developed to promote the practice of RAS in the fish breeding and seed production in the future. 1) It is essential for the biological response of parent fish, eggs, and larval to the RAS environment stressors in the system design and seed production. 2) The control technology of environment and water quality can be developed in the scientific system configuration for different fish species. 3) The corresponding intelligent equipment can also developed during this time, such as, the screening for the parent fish using the computer vision, automatic counting for the eggs and larval, as well as the smart feeder for the live food.

       

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