Department of Fisheries Sciences, Vidyasagar University, Midnapore, 721 102, West Bengal, India.
Smart Aquaculture Research Centre, Chonnam National University, Yeosu, 59626, Republic of Korea.
Sci Rep. 2024 Mar 25;14(1):7001. doi: 10.1038/s41598-024-56432-4.
Organic aquaculture is a new approach in the modern farming system. As the capital investment is higher for setting up the organic aquaculture, it is essential to conduct an economic feasibility study with compare the conventional farming system. In the current study, economic feasibility of culturing Indian major carps (IMC) using conventional culture system and organic culture system (OCS) were evaluated. IMC was cultured for three consecutive years from 2017 to 2019 in experimental ponds of 0.015 hectare (ha) area each. The crude protein content of the organic and conventional feed was maintained at the same iso-nitrogenous level (32% crude protein) but the highest production to the tune of 19 tons per ha was obtained in OCS. Further, in case of OCS, apart from fish production, vermicomposting to the tune of 45,000 kg ha in the first year, and 90,000 kg ha from second year onward is achievable by installing a vermicomposting unit of 200 tons annual capacity. Economic analysis of the culture systems assuming a project period of 10 years showed that the highest net present value (NPV) of 1.06 million USD, a payback period of one year and nine months and an internal rate of return (IRR) of 51% are achievable per ha of fish culture pond for OCS. Sensitivity analysis of various costs performed for OCS revealed that profitability of the organic fish farming investment is most sensitive to the total fish production and sale price of the organic fishes. In terms of production of fish and economics of organic culture system is proved to be the best available technique.
有机水产养殖是现代养殖系统中的一种新方法。由于建立有机水产养殖的资本投资较高，因此有必要进行经济可行性研究，并将其与传统养殖系统进行比较。在本研究中，评估了使用传统养殖系统和有机养殖系统（OCS）养殖印度主要鲤鱼（IMC）的经济可行性。从 2017 年到 2019 年，在每个面积为 0.015 公顷的实验池塘中连续三年养殖 IMC。有机和常规饲料的粗蛋白含量保持在相同的等氮水平（32%粗蛋白），但在 OCS 中获得了最高的产量，达到每公顷 19 吨。此外，在 OCS 中，除了鱼类生产外，通过安装每年 200 吨产能的蚯蚓养殖单元，第一年可实现 45,000 公斤/公顷的蚯蚓养殖，第二年及以后可实现 90,000 公斤/公顷的蚯蚓养殖。假设项目期为 10 年，对养殖系统进行经济分析表明，OCS 每公顷鱼类养殖池塘的最高净现值（NPV）为 106 万美元，投资回收期为一年零九个月，内部收益率（IRR）为 51%。对 OCS 进行的各种成本敏感性分析表明，有机鱼类养殖投资的盈利能力对鱼类总产量和有机鱼类的销售价格最为敏感。就鱼类生产和有机养殖系统的经济性而言，OCS 被证明是最佳可用技术。
