This paper explores how changes in sea surface temperature (SST) affect tuna catch in countries in the Eastern Pacific Ocean (EPO). We apply a production function approach to establish the relationship between SST and the catch of yellowfin (Thunnus albacares) and skipjack tuna (Katsuwonus pelamis) that use purse seines. We use data for 1° latitude/longitude grids within the exclusive economic zones of countries in the EPO. Catch of yellowfin and skipjack tuna increases with SST in all countries, with high values of catch recorded in the eastern coastal borders. The biggest increase in revenue from yellowfin and skipjack tuna as result on 1 °C increase in SST is for Mexico, while Kiribati had the smallest increase. However, if we adjust the increase in revenue by coastal population, the highest values are for Kiribati and French Polynesia. The higher tuna catch translates to higher government revenue from tuna fishing licenses, and more jobs for tuna fishers and those in the tuna processing industry in the state. However, the reduction on catch of other species may offset the positive effects on tuna catch, and may even result in a negative impact overall. We highlight the importance of conducting research on SST that is specific to species, gear, and location to fully account for the impact of ocean warming.

本文探讨了东太平洋国家（EPO）中海表温度（SST）的变化如何影响金枪鱼的捕获。我们采用生产函数方法建立SST与黄鳍金枪鱼（Thunnus albacares）和skip鱼（Katsuwonus pelamis）的捕获量之间的关系。），使用塞纳河围网。我们将数据用于EPO国家/地区专属经济区内的1°纬度/经度网格。在所有国家中，黄鳍金枪鱼和skip金枪鱼的捕捞量随海面温度的增加而增加，东部沿海边界记录的捕捞量很高。黄海和skip鱼的收入增加幅度最大的是墨西哥海温提高1°C，而基里巴斯的增长幅度最小。但是，如果我们按沿海人口调整收入增长，则基里巴斯和法属波利尼西亚的价值最高。金枪鱼捕捞量的增加转化为政府从金枪鱼捕捞许可证中获得的收入增加，金枪鱼捕捞者和该州金枪鱼加工业的工作机会增加。但是，其他物种捕捞量的减少可能抵消了对金枪鱼捕捞量的积极影响，甚至可能对整体造成负面影响。我们强调针对物种，渔具和位置进行SST研究的重要性，以充分考虑到海洋变暖的影响。