Mohd Noor Sam, Nur Farhah Sofia (2022) Occurrence of ectoparasites in sea catfish, Hexanematichthys sagor (Hamilton, 1822) in Sabak Bernam, Selangor. [Project Paper] (Submitted)
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Abstract
The sea catfish, Hexanematichthys sagor (Hamilton, 1822) are commonly found in estuaries in Malaysia and occasionally caught for consumption by the locals. The scavenging feeding behavior raises concern as it has the potential to harbor parasites and can lead to public health issues. Therefore, the main purpose of this study was to evaluate the occurrence of ectoparasites, compare the ectoparasite occurrence between juvenile and adult fish and assess the histopathological changes on the skin, gills and fin. A total of five juvenile and five adult fish were collected from local fishermen in Sekendi, Sabak Bernam. Ectoparasite from the skin, gills and fin were identified using direct wet mount technique and the gills were obtained for histopathological evaluation and preserved in chilled 10% buffered formalin for processing. The parasitic prevalence and intensity were analyzed using t-test in GraphPad version 9. The ectoparasite identified by wet mount were Trichodina sp., Dactylogyrus sp., Argulus sp. and Caligus sp. In all 10 fish samples, Trichodina sp. was observed with the prevalence of 100% and Dactylogyrus sp., was observed in all adult fish. Parasite intensity was the highest in gills for both juvenile and adult; 11.0 and 23.2 respectively. For the gill histopathology changes, a scoring of 0-3 was measured based on five criteria which were lamellar hyperplasia, lamellar fusion, cellular anomalies, lamellar oedema and an ancillary criterion, which was the absence or presence of parasite. From this study, lamellar hyperplasia was observed in 90% of the gill samples and 80% had the ancillary criterion. However, this study revealed that there was no significant difference in parasitic burden between juvenile and adult fish. The findings obtained from this study of the Hexanematichthys sagor could serve as a preliminary parasite inventory and for future studies on the potential risks of consumption of the species.
| Item Type: | Project Paper |
|---|---|
| Faculty: | Faculty of Veterinary Medicine |
| Depositing User: | Ms. Nordeena Abdul Aziz |
| Date Deposited: | 13 Mar 2024 04:35 |
| Last Modified: | 13 Mar 2024 04:35 |
| URI: | http://psaspb.upm.edu.my/id/eprint/1660 |
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