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- Title
Pilot Field Trial to Evaluate SLICE (0.2% Emamectin Benzoate)–Medicated Feed to Reduce a Natural Infestation of Salmincola californiensis in Freshwater-Reared Rainbow Trout.
- Authors
Gunn, Carolyn; Carty, Daniel; Walker, Peter G.; Colburn, Patricia A.; Bowker, James D.
- Abstract
Salmincola spp. infestations can adversely affect freshwater-reared salmonids. Control methods tested to date have had limited success; consequently, we conducted a pilot field trial to evaluate SLICE (0.2% emamectin benzoate [EB])–medicated feed to reduce a natural infestation of S. californiensis in freshwater-reared rainbow trout Oncorhynchus mykiss. Before the trial started, 96 of 1,500 rainbow trout broodstock held in a flow-through raceway were impartially captured, sedated, uniquely tagged, and returned to the raceway. Pretreatment S. californiensis infestation prevalence and intensity were 97% and 10.4 ± 7.6 (mean ± SD) adult female parasites per fish, respectively. Treatment was administered at 50 μg EB·kg fish−1·d−1 for 7 d. By the end of the trial (43 d posttreatment), infestation prevalence and intensity had decreased to 32% and 1.6 ± 1.1 adult female parasites per fish, respectively. These results suggest that SLICE-medicated feed can be used to reduce natural infestations of S. californiensis in freshwater-reared rainbow trout. Received November 15, 2011; accepted January 30, 2012
- Subjects
EMAMECTIN benzoate; RAINBOW trout fishing; FRESHWATER fishes; FISH microbiology; BROOD stock assessment; FISH breeding
- Publication
North American Journal of Aquaculture, 2012, Vol 74, Issue 3, p424
- ISSN
1522-2055
- Publication type
Article
- DOI
10.1080/15222055.2012.676015