GenoMar Genetics Group, 105N, Al. das Aroeiras, Lote 4, Ap.1402, Palmas, TO, Brazil.
GenoMar Genetics Group, Oluf Thesens vei 6, 1433, Ås, Norway.
Sci Rep. 2022 May 24;12(1):8754. doi: 10.1038/s41598-022-12649-9.
Disease outbreaks have been seen as the major threat to sustainable aquaculture worldwide. Injectable vaccines have been one of the few strategies available to control the diseases, however, the adoption of this technology globally is limited. Genetic selection for disease resistance has been proposed as the alternative strategy in livestock and aquaculture. Economic analysis for such strategies is lacking and this study assesses the economic worth of using tilapia fingerlings resistant to Streptococcosis in both cage and pond production systems. The paper also assesses the profitability of paying the higher price for such fingerlings. Partial-budgeting was used to develop a stochastic simulation model that considers the benefits and costs associated with the adoption of tilapia fingerlings resistant to Streptococcosis at the farm level, in one production cycle. In both ponds and cage production systems, the use of genetically selected Streptococcus resistant tilapia fingerlings was found to be profitable where Streptococcus infection is prevalent. In the cages and ponds where Streptococcus related mortality was ≥ 10%, the Nile tilapia aquaculture was found to be profitable even if the amount paid for genetically selected Streptococcus resistant tilapia fingerlings was 100% higher than the amount paid for standard fingerlings.
疾病爆发被视为全球可持续水产养殖的主要威胁。注射疫苗是控制疾病的少数策略之一，但这项技术在全球的应用受到限制。遗传选择抗病性已被提议作为家畜和水产养殖的替代策略。这种策略的经济分析尚缺乏，本研究评估了在网箱和池塘生产系统中使用对链球菌病具有抗性的罗非鱼鱼苗的经济价值。本文还评估了支付更高价格购买此类鱼苗的盈利能力。部分预算法被用于开发一个随机模拟模型，该模型考虑了在一个生产周期内，在农场层面上采用对链球菌病具有抗性的罗非鱼鱼苗的相关收益和成本。在池塘和网箱生产系统中，在链球菌感染普遍存在的情况下，使用遗传选择的具有链球菌抗性的罗非鱼鱼苗是有利可图的。在链球菌相关死亡率≥10%的网箱和池塘中，即使支付给遗传选择的具有链球菌抗性的罗非鱼鱼苗的金额比支付给标准鱼苗的金额高出 100%，尼罗罗非鱼养殖也是有利可图的。
