Impact of Caligus treatments on unit costs of heterogeneous salmon farms in Chile
Impact of Caligus treatments on unit costs of heterogeneous salmon farms in Chile
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DOI：
10.1080/13657305.2018.1449271
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发表时间：
2019-01-02
影响因子：
3.9
通讯作者：
Tello, Alfredo
中科院分区：
文献类型：
--
作者：
Dresdner, Jorge;Chavez, Carlos;Tello, Alfredo
我们衡量了控制外寄生虫 Caligus rogercresseyi 丰度的卫生处理对智利 Salmo salar 农场单位生产成本的影响。我们跟踪了 2009 年至 2015 年间农场样本的完整生产周期。我们估计了同步鲑鱼生物量增长和 Caligus 丰度模型。统计分析确定了抗寄生虫治疗、养殖场位置、环境条件和 Caligus 丰度对鲑鱼生长状况的影响。使用外部成本信息，我们模拟单位生产成本如何因处理和农场特征而变化。我们的结果表明，使用 Caligus 和其他处理方法，单位生产成本平均增加 1.4 美元/公斤。处理成本通过更高的收获水平来补偿，并且单位生产成本在不进行处理的情况下是不变的。所有估计的影响都根据农场的环境和空间条件而有所不同，这表明具有成本效益的干预措施的设计需要在异质条件下进行歧视性监管。
We measure the impact that sanitary treatments that control ectoparasite Caligus rogercresseyi abundance have on unit production costs of Salmo salar farms in Chile. We follow complete production cycles for a sample of farms between 2009 and 2015. We estimate a simultaneous salmon biomass growth and Caligus abundance model. The statistical analysis determines the effect of antiparasitic treatments, location of farms, environmental conditions and Caligus abundance on the salmon growth profile. Using outside cost information, we simulate how unit production costs vary by treatment and farm characteristics. Our results suggest that unit production costs increase on average by $1.4 US/kg with Caligus and treatments. Treatment costs are compensated by higher harvesting levels, and unit production costs are invariant to the situation without treatment. All estimated effects differ depending on farm's environmental and spatial conditions, suggesting that the design of cost-effective intervention calls for discriminatory regulation under heterogeneous conditions.