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Title: Emamectin Benzoate Treatment of Hybrid Grouper Infected With Sea Lice in Hong Kong
Authors: St-Hilaire, Sophie
Cheng, Tzu Hsuan
Chan, Stephen Chi Ho
Leung, Chi Fai
Chan, Ka Man
Lim, Kwok Zu
Furtado, William
?Giana Bastos Gomes
Keywords: Caligus
copepodid parasites
emamectin benzoate
grouper aquaculture
parasite control
Issue Date: 12-Feb-2021
Publisher: Frontiers Media S.A.
Citation: St-Hilaire, Sophie, Cheng, Tzu Hsuan, Chan, Stephen Chi Ho, Leung, Chi Fai, Chan, Ka Man, Lim, Kwok Zu, Furtado, William, ?Giana Bastos Gomes (2021-02-12). Emamectin Benzoate Treatment of Hybrid Grouper Infected With Sea Lice in Hong Kong. Frontiers in Veterinary Science 8 : 646652. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: Sea lice (Copepoda: Caligidae) are ectoparasites which negatively impact marine aquaculture species around the world. There are a limited number of treatments licensed for use against sea lice in tropical and semi-tropical farmed fish species. Emamectin benzoate (EB) was an effective pharmaceutical drug against sea lice infestations in several salmon industries before resistance to the product developed. This drug has not been extensively tested in marine fish within Asia. The objective of this study was to determine whether this drug could be used to treat oral infections with sea lice in hybrid grouper (Mycteroperca tigris × Epinephelus lanceolatus) cultured in saltwater net-pen sites in Hong Kong. We observed an overall reduction in sea lice infections over time, starting on the last day of the treatment up to the end of our study (i.e., 14 days after the last EB treatment). We also observed a large variation in concentrations of EB in fish on the last day of the treatment, which provides an explanation for the variation in response to the treatment. It also suggests that distribution of the medication to fish in saltwater net-pens is difficult, especially when medication is hand-mixed in the feed and possibly unevenly distributed in the daily rations. Overall, this study provides preliminary evidence that EB could be used to treat sea lice found in Hong Kong and potentially in other regions of SE Asia. © Copyright © 2021 St-Hilaire, Cheng, Chan, Leung, Chan, Lim, Furtado and Bastos Gomes.
Source Title: Frontiers in Veterinary Science
ISSN: 2297-1769
DOI: 10.3389/fvets.2021.646652
Rights: Attribution 4.0 International
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