Centro de Investigaciones Biológicas del Noroeste (CIBNOR) S.C., Km. 1, Carretera a San Juan de La Costa "El Comitán", 23097, La Paz, Baja California Sur, Mexico.
Centro de Investigación en Alimentación y Desarrollo, A. C., Unidad Mazatlán en Acuicultura y Manejo Ambiental, Av. Sábalo Cerritos s/n, C.P., 82010, Mazatlán, Sinaloa, Mexico.
Parasitol Res. 2019 Dec;118(12):3267-3277. doi: 10.1007/s00436-019-06460-1. Epub 2019 Oct 31.
Seriola rivoliana cultivated in Mexico are infected by Neobenedenia sp. (Monogenea: Capsalidae), resulting in dermal ulceration and subsequent bacterial invasion that can cause fish death. This study assesses the effects of temperature over hatching success, oncomiracidia longevity, and infection success. The experimental design consisted of culturing the parasite at temperatures ranging between 16 and 32 °C. The oncomiracidia infection success, time to sexual maturity, and size at sexual maturity of Neobenedenia sp. were examined only at three temperatures (20 °C, 24 °C, and 30 °C). Experiments were conducted under controlled conditions in the laboratory. The oncomiracidia development was found to be faster at warmer temperatures (4-5 days between 24 and 30 °C) than in colder treatments (7-11 days between 18 and 20 °C). Hatching success and oncomiracidia longevity were higher at 24 °C and 26 °C. At 20 °C, 24 °C, and 30 °C, infection success was greater than 90%. Additionally, the laid eggs were observed at 9, 12, and 15 days at 30 °C, 24 °C, and 30 °C, respectively. The results of this study will allow for improving the temporal schedule of applications of treatments against Neobenedenia sp. by the function of temperatures. In conclusion, it is recommended to treat fish more frequently if the temperature in cultures is higher than 24 °C, because Neobenedenia sp. development is faster. As an alternative, the fish could be moved to deeper and cooler waters.
墨西哥养殖的红鳍东方鲀感染了 Neobenedenia 属（单殖吸虫目：Capsalidae），导致皮肤溃疡和随后的细菌入侵，从而导致鱼类死亡。本研究评估了温度对孵化成功率、后囊蚴寿命和感染成功率的影响。实验设计包括在 16 至 32°C 的温度下培养寄生虫。仅在三个温度（20°C、24°C 和 30°C）下检查 Neobenedenia 属的后囊蚴感染成功率、性成熟时间和性成熟大小。实验在实验室的控制条件下进行。发现后囊蚴在温暖的温度下（24°C 和 30°C 之间为 4-5 天）比在较冷的温度下（18°C 和 20°C 之间为 7-11 天）发育得更快。在 24°C 和 26°C 时，孵化成功率和后囊蚴寿命更高。在 20°C、24°C 和 30°C 时，感染成功率大于 90%。此外，在 30°C、24°C 和 30°C 下分别在第 9、12 和 15 天观察到产卵。本研究的结果将允许根据温度的功能改进针对 Neobenedenia 属的治疗应用的时间安排。总之，如果培养物中的温度高于 24°C，则建议更频繁地治疗鱼类，因为 Neobenedenia 属的发育速度更快。作为替代方案，可以将鱼类转移到更深和更凉爽的水中。
