Liu Yajie, Bjelland Hans Vanhauwaer
SINTEF Fisheries and Aquaculture (Fiskeri og havbruk), Postboks 4762, Sluppen, 7465 Trondheim, Norway.
Prev Vet Med. 2014 Dec 1;117(3-4):469-77. doi: 10.1016/j.prevetmed.2014.08.018. Epub 2014 Oct 14.
This paper explores the costs of sea lice control strategies associated with salmon aquaculture at a farm level in Norway. Diseases can cause reduction in growth, low feed efficiency and market prices, increasing mortality rates, and expenditures on prevention and treatment measures. Aquaculture farms suffer the most direct and immediate economic losses from diseases. The goal of a control strategy is to minimize the total disease costs, including biological losses, and treatment costs while to maximize overall profit. Prevention and control strategies are required to eliminate or minimize the disease, while cost-effective disease control strategies at the fish farm level are designed to reduce the losses, and to enhance productivity and profitability. Thus, the goal can be achieved by integrating models of fish growth, sea lice dynamics and economic factors. A production function is first constructed to incorporate the effects of sea lice on production at a farm level, followed by a detailed cost analysis of several prevention and treatment strategies associated with sea lice in Norway. The results reveal that treatments are costly and treatment costs are very sensitive to treatment types used and timing of the treatment conducted. Applying treatment at an early growth stage is more economical than at a later stage.
本文探讨了挪威养殖场层面与三文鱼养殖相关的海虱控制策略成本。疾病会导致生长减缓、饲料效率低下和市场价格降低，死亡率上升，以及预防和治疗措施的支出增加。水产养殖场遭受疾病带来的最直接和即时的经济损失。控制策略的目标是在使包括生物损失和治疗成本在内的总疾病成本最小化的同时，使总体利润最大化。需要预防和控制策略来消除疾病或使其最小化，而养殖场层面具有成本效益的疾病控制策略旨在减少损失，提高生产力和盈利能力。因此，通过整合鱼类生长模型、海虱动态模型和经济因素可以实现这一目标。首先构建一个生产函数，以纳入海虱对养殖场层面生产的影响，随后对挪威几种与海虱相关的预防和治疗策略进行详细的成本分析。结果表明，治疗成本高昂，且治疗成本对所使用的治疗类型和治疗时间非常敏感。在生长早期进行治疗比在后期更经济。
