Rainbow trout culture failure in a small lake as a result of massive parasitosis related to careless fish introductions

Efficacy of emamectin benzoate in the control of Argulus coregoni (Crustacea: Branchiura) on rainbow trout Oncorhynchus mykiss

“…Severe infestations by Argulus species have been reported throughout the world (Shimura 1983, Menezes et al 1990, Gault et al 2002, Hakalahti & Valtonen 2003 and control attempts traditionally have been based upon bath immersion treatments using a variety of chemical compounds (e.g. Kabata 1970, ABSTRACT: Efficacy of in-feed treatment with emamectin benzoate (Slice) for the control of ectoparasitic Argulus coregoni on rainbow trout Oncorhynchus mykiss was tested under laboratory and field conditions.…”

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“…Las lesiones observadas en los peces corresponden a lo mencionado por la literatura (Taylor et al, 2005;Noga, 2010) (Menezes et al, 1990). Si bien en la naturaleza tales patógenos pueden no ocasionar efectos deletéreos masivos en las poblaciones silvestres, cuando los peces silvestres portadores son confinados en densidades inusualmente altas y bajo condiciones propicias para el desarrollo de los patógenos, pueden ocasionarse infecciones o infestaciones masivas que incluso pueden derivar en una alta mortalidad de la población.…”

Argulus of Indian Major Carps in Selected Fish Farms of Mymensingh

“…They cause mortalities of fish in aquaria, in lakes and estuaries and occasionally cause problems in sea-caged salmonids (Menezes et al, 1990;Stuart, 1990). Secondary infections by fungi and bacteria reduce the commercial value of parasitized carp and goldfish (Shimura, 1983).…”