'Pasteurised' Tilapia: Drastic Mortality of Gyrodactylus cichlidarum During the Spring 2024 Heat Wave
Por:
Miranda-Aguirre, JC, García-Vásquez, A, Salazar-Ulloa, M, Muñoz-Córdova, G, Rubio-Godoy, M
Publicada:
1 abr 2025
Ahead of Print:
1 dic 2024
Resumen:
During spring 2024, a heat wave induced sustained water temperatures of 34 degrees C during a week in Veracruz, Mexico. Serendipitously, we monitored Gyrodactylus cichlidarum infecting farmed tilapia during this pulse warming event and recorded the drastic decline of parasite populations within a week; established that parasites incubated in vitro at 27 degrees C survived up to 24 hours, while at 30 degrees C and 34 degrees C, all worms had died within 4-8 hours; and registered abnormal haptor structures of parasites developed and born while temperature was 34 degrees C. Under farming conditions, no major/unusual mortality was recorded for fish, suggesting pulse heat treatment may be an effective method to control G. cichlidarum, a recognized tilapia pathogen.
Filiaciones:
Inst Ecol AC, Xalapa, Veracruz, Mexico
Univ Nacl Autonoma Mexico, Fac Med Vet & Zootecnia, Ctr Ensenanza Invest & Extens Ganaderia Trop CEIEG, Tlapacoyan, Veracruz, Mexico
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