COPEPOD AND NEMATODE PARASITES OF THE THREE-SPOTTED DAMSELFISH DASCYLLUS TRIMACULATUS FROM BIDONG ISLAND, TERENGGANU
DOI:
https://doi.org/10.46754/umtjur.v3i1.187Keywords:
Three-spotted damsel, nematode parasite, Lernaocera branchialis, prevalence, mean intensityAbstract
This study focuses on the parasites in Dascyllus trimaculatus fish in Bidong Island. Though D. trimaculatus is a common reef fish, there is lack on parasites studies of this fish in Malaysia. The objectives of this study are to identify metazoan parasites and analyse the prevalence and mean intensity the parasites in D. trimaculatus. Sampling was randomly conducted on a coral colony of 100 meters within a 15m depth at Pantai Pasir Cina, Bidong Island. This research resulted in the identification of a copepod Lernaeocera branchialis and a nematode from the family Camallanidae. The copepods collected in this study infected 20 out of 42 D. trimaculatus specimens, whereas the nematode-like parasites collected infected 18 of out of 42 D. trimaculatus. All copepods found in the gills of D. trimaculatus had a prevalence of 4.95 and mean intensity of 47.62%, while the nematode-like parasite, which were found in the brain, had 2.72 prevalence and 42.86% mean intensity. This elucidates that both parasites are categorised as having light level but common frequency of infection, and the current IUCN status of D. trimaculatus has not been reported to be harmed by parasites. Though the mean intensity of both parasites is not harmful, the prevalence are concerning and might increase in the future, with further incorporation and monitoring of climate change factors that may affect the damselfish.
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