The prevalence and median intensity of infection of Pacific sierra (Scomberomorus sierra) by parasitic copepods (Caligus fajerae, Caligus omissus, and Cybicola buccatus), and monogeneans (Thoracocotylidae) were examined over a six-year period (2015 to 2021) in the southeastern Gulf of California. This period included sea surface temperatures that were warmer and colder than average (SST anomalies). A regression model indicated that the prevalence of parasitic species was higher when conditions were warmer than average, although some of the relationships were non-significant. Prolonged periods of high temperature and heat pulses >2 °C above the average temperature negatively affected the prevalence of parasites. A moderate or high prevalence of parasites was observed during colder than average conditions. These results are in accordance with those of previous studies showing that fish ectoparasites are able to develop under a wide range of thermal conditions.

寄生桡足类（Caligus fajerae , Caligus omissus和Cybicola buccatus）对太平洋山脉（Scomberomorus sierra）的感染率和中值强度）和单殖吸虫科（Thoracocotylidae）在加利福尼亚湾东南部的六年期间（2015 年至 2021 年）进行了检查。这一时期包括比平均温度更高和更低的海面温度（SST 异常）。回归模型表明，当条件比平均温度高时，寄生物种的流行率更高，尽管其中一些关系不显着。长时间高温和高于平均温度 2 °C 的热脉冲会对寄生虫的流行产生负面影响。在比平均条件更冷的情况下，观察到寄生虫的中度或高度流行。这些结果与之前的研究结果一致，表明鱼类体外寄生虫能够在广泛的热条件下发育。