Experimental challenges of Atlantic salmon Salmo salar with incremental levels of copepodids of sea louse Caligus rogercresseyi: effects on infestation and early development.

摘要

Over the last decade, the native parasite which has worst affected salmonids reared in Chile (Atlantic salmon and Rainbow trout) is Caligus rogercresseyi (Gonza′lez & Carvajal 1994; Gonza′lez, Carvajal & Medina 1995; Boxshall & Bravo 2000; Rozas & Asencio 2007). The ?nancial costs associated with treating Caligus have been estimated at US$0.30 kg 1 or US$160 million annually, principally from intensive use of antiparasitic drugs (Carvajal, Gonzalez & Nascimento 1998; Costello 2009). Consequently with the economic impact caused by this parasite to the Chilean salmon aquaculture, several studies have described signi?- cant biological aspects of Caligus species along with their interaction with wild and cultured hosts (Gonza′lez, Carvajal & George-Nascimento 2000; Gonza′lez & Carvajal 2003; Pino-Marambio, Mordue, Birkett, Carvajal, Asencio, Mellado & Quiroz 2007).