Efficacy of Aqui-S, formalin and praziquantel against the monogeneans, Benedenia seriolae and Zeuxapta seriolae, infecting yellowtail kingfish Seriola lalandi lalandi in New Zealand

摘要: This study assessed the efficacy of bath administrations Aqui-S, formalin and praziquantel against adults eggs Benedenia seriolae Zeuxapta seriolae, two monogenean ectoparasites kingfish (Seriola lalandi lalandi). Our results showed that 2.5 ppm administered for either 24 or 48 h was most effective treatment removing B. (>99%). However, treated with deposited viable eggs. Formalin at 250 400 1 followed by a 5 min freshwater dip less (ca. 80%), but both treatments inhibited production parasites. large proportion exposed to remained viable. Praziquantel (2.5 h) (400 h+5 f/w dip) were Z. from gills (>99%) parasites thus removed continued deposit Exposure anaesthetic Aqui-S did not significantly increase numbers host above those control, it ineffective in preventing parasites, reduce egg viability. Eggs prevented hatching unless air period greater than 3 h, only if periods prior development eyespots. These indicate primary secondary will be required successfully control infections captive kingfish.