Emamectin Benzoate Treatment of Hybrid Grouper Infected With Sea Lice in Hong Kong

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

3 Scopus Citations
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Author(s)

  • Tzu Hsuan Cheng
  • Stephen Chi Ho Chan
  • Chi Fai Leung
  • Ka Man Chan
  • Kwok Zu Lim

Detail(s)

Original languageEnglish
Article number646652
Journal / PublicationFrontiers in Veterinary Science
Volume8
Online published12 Feb 2021
Publication statusPublished - Feb 2021

Link(s)

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.

Research Area(s)

  • Caligus, copepodid parasites, emamectin benzoate, grouper aquaculture, parasite control

Citation Format(s)

Emamectin Benzoate Treatment of Hybrid Grouper Infected With Sea Lice in Hong Kong. / St-Hilaire, Sophie; Cheng, Tzu Hsuan; Chan, Stephen Chi Ho; Leung, Chi Fai; Chan, Ka Man; Lim, Kwok Zu; Furtado, William; Bastos Gomes, Giana.

In: Frontiers in Veterinary Science, Vol. 8, 646652, 02.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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