Parasites, Hosts and Diseases

The Korea Society for Parasitology and Tropical Medicine (대한기생충학·열대의학회)
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Correlation of endemicity between monogenean trematode, Microcotyle sebastis, and parasitic copepods in Korean rockfish, Sebastes schlegelii, from a fish farm in Tongyeong-si, Gyeongsangnam-do, Korea

  • Won-Sik Woo (Department of Marine Biology & Aquaculture, College of Marine Science, Gyeongsang National University) ;
  • Gyoungsik Kang (Department of Marine Biology & Aquaculture, College of Marine Science, Gyeongsang National University) ;
  • Kyung-Ho Kim (Department of Marine Biology & Aquaculture, College of Marine Science, Gyeongsang National University) ;
  • Ha-Jeong Son (Department of Marine Biology & Aquaculture, College of Marine Science, Gyeongsang National University) ;
  • Min-Young Sohn (Department of Marine Biology & Aquaculture, College of Marine Science, Gyeongsang National University) ;
  • Chan-Il Park (Department of Marine Biology & Aquaculture, College of Marine Science, Gyeongsang National University)
  • Received : 2023.02.11
  • Accepted : 2023.07.02
  • Published : 2023.08.31
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Abstract

Infestations of parasites, particularly those caused by copepods and monogeneans, are a major hindrance to aquaculture and have a big negative economic impact. Sebastes schlegelii, a farmed Korean rockfish, is particularly prone to copepods and monogeneans. This study comprehended how parasitic copepods and rockfish from a farm in Tongyeong-si, Gyeongsangnam-do, Korea, are related to the monogenean trematode Microcotyle sebastis. Our research revealed that monogeneans predominated, with a rate of 98.4% and an average infection intensity of 7 per infected fish. With an average infection intensity of 4 per sick fish, the infection rate for parasitic copepods was equally considerable, coming in at 91.7%. The high co-infection rate of both parasite families, at 90.8%, is noteworthy. Furthermore, Lepeophtheirus elegans and Peniculus truncatus, 2 parasitic copepod species, were discovered to have M. sebastis eggs attached to their bodies. This demonstrates a connection between parasitic copepod infestations in farmed Korean rockfish and the monogenean trematode M. sebastis. These discoveries highlight the necessity for creating more potent parasite control methods for the aquaculture sector and shed light on the intricate relationships between various parasite species.

Keywords

Acknowledgement

This work was funded by the Ministry of Oceans and Fisheries (grant number NFQS2023002). All experimental protocols were performed following the guidelines of the Institutional Animal Care and Use Committee of Gyeongsang National University (approval numbers: GNU-220519-E0051).

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