Mohd Yazid Siti Hajar, Mohd Daud Hassan, Azmai Mohammad Noor Amal, Mohamad Nurliyana, Mohd Nor Norhariani
Department of Veterinary Preclinical Sciences, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang, Malaysia.
Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang, Malaysia.
Front Vet Sci. 2021 Oct 8;8:644009. doi: 10.3389/fvets.2021.644009. eCollection 2021.
This study aims to estimate the economic loss due to vibriosis in the production of Asian seabass in floating net-cages on the east coast of Peninsular Malaysia. Asian seabass has contributed significantly to Malaysia's economic activities and food security. However, its production can be hindered by the occurrence of diseases, such as vibriosis, causing severe economic losses to farmers. A questionnaire-based survey was conducted on 14 small-scale monoculture Asian seabass net-cage farms. Using a stochastic bioeconomic model and inputs from the survey, existing literature, and expert opinion, the economic losses were determined. Moreover, this model considered the prevalence of spp. at a farm on the east coast and the risk posed by its infection from hatcheries. The results showed that 71.09% of Asian seabass simulated in the stochastic model survived. The mortality rate due to vibriosis and other causes was at 16.23 and 12.68%, respectively. The risk posed by spp. infection from hatcheries contributed to 2.77% of the increase in Asian seabass mortality. The stochastic model estimated that the total cost of producing a tail of Asian seabass was €2.69 per kilogram. The economic loss of vibriosis was estimated at €0.19 per tail per kilogram, which represents 7.06% of the total production cost of Asian seabass per kilogram. An increase in the prevalence of clinical vibriosis and vibriosis case fatality rate at 42 and 100%, respectively, will lead to an increase in the cost of grow-out Asian seabass by €0.29 per tail from the default value. An increase in pellet price per kilogram by €1.38 and feed conversion ratio pellet by 0.96 will consequently increase the cost of grow-out Asian seabass by €2.29 per tail and €0.82 per tail, respectively. We find that the occurrence of spp. infection at the hatchery level can contribute to an increased risk in the mortality of Asian seabass during the grow-out phase. Hence, we also need to focus on the control and prevention of vibriosis infection from hatcheries.
本研究旨在估算马来西亚半岛东海岸浮式网箱养殖尖吻鲈过程中由弧菌病造成的经济损失。尖吻鲈对马来西亚的经济活动和粮食安全做出了重大贡献。然而，其生产可能会受到疾病（如弧菌病）的影响，给养殖户带来严重的经济损失。对14个小规模单养尖吻鲈的网箱养殖场进行了问卷调查。利用随机生物经济模型以及调查、现有文献和专家意见中的数据，确定了经济损失。此外，该模型考虑了东海岸一个养殖场中弧菌属的流行情况及其从孵化场感染带来的风险。结果显示，随机模型中模拟的尖吻鲈有71.09%存活。由弧菌病和其他原因导致的死亡率分别为16.23%和12.68%。孵化场弧菌属感染带来的风险导致尖吻鲈死亡率增加了2.77%。随机模型估计，生产一尾尖吻鲈的总成本为每千克2.69欧元。弧菌病造成的经济损失估计为每尾每千克0.19欧元，占尖吻鲈每千克总生产成本的7.06%。临床弧菌病患病率和弧菌病病死率分别增加42%和100%，将导致尖吻鲈养成成本比默认值每尾增加0.29欧元。每千克颗粒饲料价格增加1.38欧元以及颗粒饲料转化率增加0.96，将分别导致尖吻鲈养成成本每尾增加2.29欧元和0.82欧元。我们发现，孵化场层面弧菌属感染的发生会导致尖吻鲈养成阶段死亡风险增加。因此，我们还需要关注孵化场弧菌病感染的控制和预防。
