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Efficacy of the treatments used for the control of C aligus rogercresseyi infecting A tlantic salmon, S almo salar L., in a new fish‐farming location in R egion XI , C hile
Author(s) -
Bravo S,
Nuñez M,
Silva M T
Publication year - 2013
Publication title -
journal of fish diseases
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 85
eISSN - 1365-2761
pISSN - 0140-7775
DOI - 10.1111/jfd.12023
Subject(s) - biology , deltamethrin , rainbow trout , fishery , outbreak , toxicology , zoology , agricultural science , fish <actinopterygii> , ecology , pesticide , virology
C aligus rogercresseyi is the most important parasite affecting A tlantic salmon and rainbow trout farming in sea water in C hile. After the outbreaks of the i nfectious s almon a naemia recorded in R egion X from 2007, the salmon industry has expanded southwards to R egion XI , where 60% of A tlantic salmon in C hile is now produced. In parallel with the relocation of salmon production, sea lice infestation has also spread to R egion XI , and today C . rogercresseyi is the most serious threat to the salmon‐farming industry in this region. The results obtained through a year of monitoring between S eptember 2007 and A ugust 2008 on a farm located in the ‘ L as G uaitecas A rchipelago’ in R egion XI (44°S; 74°W) showed that treatments with emamectin benzoate and deltamethrin did not give the expected control of C aligus . Failures of the treatments were associated with the loss of sensitivity recorded for C . rogercresseyi to emamectin benzoate in R egion X . In addition, a major influence was the lack of delousing coordination measures with the neighbouring farms sharing the same area in that period.