Price volatility, an indicative measure of price uncertainty, is an important factor influencing fisheries cost, income, food security, and pressure on fish stocks. An increase in price volatility means that prices are varying more, making it more difficult to adjust the activities accordingly. This paper explores price volatility changes for the small pelagic fish—a key group for food security—related to the potential outcomes of climate change, such as tropical widening. With the tropicalization of temperate and polar marine ecosystems due to species composition changes, one would expect that overall price volatility for the small pelagics may be reduced over time because volatility in the tropical region is on average the lowest. However, we find an empirical evidence that price volatility for small pelagic species has increased relatively in the tropical and sub-polar regions beyond what can be explained by changes in landing levels and the variation in the landings.

中文翻译：

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气候变化和中上层小鱼价格波动

价格波动是价格不确定性的指标，是影响渔业成本、收入、粮食安全和鱼类种群压力的重要因素。价格波动的增加意味着价格变化更大，因此更难以相应地调整活动。本文探讨了小型远洋鱼类（粮食安全的一个关键群体）的价格波动变化与气候变化的潜在结果（例如热带扩大）有关。随着温带和极地海洋生态系统因物种组成变化而热带化，人们预计小型中上层鱼类的整体价格波动可能会随着时间的推移而减少，因为热带地区的波动率平均最低。然而，