Pathological evaluation of liver, kidney, and gills of butterfly peacock bass (Cichla ocellaris) captured from Tasik Prima, Puchong

Chong, Jessie Tze Mei (2023) Pathological evaluation of liver, kidney, and gills of butterfly peacock bass (Cichla ocellaris) captured from Tasik Prima, Puchong. [Project Paper] (Submitted)

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Abstract

Butterfly peacock bass (Cichla ocellaris); BPB, are regarded as hardy as they are capable of surviving and proliferating in polluted environments such as ex-mining pools. They accumulate environmental pollutants through ingestion and filtration which may induce pathological changes to their organs and can be harmful to humans if consumed. The purpose of this study was to evaluate pathological changes in the liver, kidney and gills of BPB and compare the severity between adult (n=5) and juvenile groups (n=5) in relation to pollutant exposure. They were caught at Tasik Prima, Puchong using fishing rods and live bait. They were weighed, euthanised, and necropsied. Organs of interest were collected, weighed, measured and the gross morphology was appraised and recorded. Organs were fixed, processed and stained with Hematoxylin and Eosin (H&E). Histopathological changes of inflammatory cell infiltration (ICI) and melanomacrophage centres (MMC) were scored. Qualitative analysis of heavy metals present in soil and muscle tissue samples were also performed using energy dispersive x-ray (EDX). Gross findings showed normal morphology of organs. Histopathological findings showed the presence of ICI in both liver and kidney and MMC in the liver. The ICI score in liver and kidney, and the MMC score in liver were significantly different (P<0.05) between the juvenile and adult groups. EDX analysis of soil showed the presence of iron (Fe), titanium (Ti), aluminium (Al), and magnesium (Mg) while niobium (Nb), platinum (Pt), lead (Pb), rubidium (Rb) and Mg were detected in the muscle tissue. In conclusion, prolonged exposure to harmful environmental pollutants may lead to effects on the liver and kidney of BPB as indicated by histopathological alterations in the adult group. The findings obtained could serve as a histopathology inventory and be used in future studies on the potential risks of consumption of the species that live in the same environment.

Item Type:	Project Paper
Faculty:	Faculty of Veterinary Medicine
Depositing User:	Ms. Nordeena Abdul Aziz
Date Deposited:	30 Oct 2024 07:45
Last Modified:	30 Oct 2024 07:45
URI:	http://psaspb.upm.edu.my/id/eprint/2098

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