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
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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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