Primera evidencia de Cichlidogyrus Paperna, 1960 (Monogenea: Ancyrocephalidae) en cultivos de Oreochromis spp. de Ecuador

First evidence of Cichlidogyrus Paperna, 1960 (Monogenea: Ancyrocephalidae) in Oreochromis spp. cultures from Ecuador

Objetivo. Evidenciar la presencia de dos especies de monogeneos del género Cichlidogyrus que causan daño al tejido de las branquias, en tilapias (Oreochromis spp.) cultivadas en Ecuador. Materiales y métodos. Las branquias se colocaron en una caja Petri, se le adicionó agua a punto de ebullición para que los parásitos se relajen, y posteriormente se fijaron en formalina al 4%. Las muestras fueron revisadas en un microscopio estereoscopio. Los parásitos fueron contados y preservados en etanol al 70% para su identificación taxonómica según sus características morfológicas. Los parámetros de infección (prevalencia, abundancia e intensidad medias) fueron calculados para cada especie de parásito. Para la descripción de daños histológicos, fragmentos de branquias parasitadas fueron fijados en formalina neutra al 10% y procesado mediante la técnica histológica de inclusión en parafina. Resultados. Cichlidogyrus sclerosus mostró los parámetros de infección más altos, prevalencia de 65%, abundancia media de 24.24 ± 68.62 e intensidad media de 37.62 ± 82.93. Cychlidogyrus dossoui fue observada en una prevalencia de 4.5%, abundancia media de 0.13 ± 0.66 e intensidad media de 3 ± 1.41. Las dos especies causaron hiperplasia en las lamelas. Conclusiones. Este estudio constituye el primer reporte de infestación por Cichlidogyrus sclerosus y C. dossoui en sistemas de cultivos de tilapias del Ecuador.

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