Abstract

Khlong Saen Saep in Bangkok is a polluted canal whose water quality fails to meet standard criteria in many areas. We hence assessed the effects of pollution on the striped catfish Pangasianodon hypophthalmus (Sauvage, 1878) commonly found in polluted areas of the canal. Fish were sampled from two stations in Khlong Saen Saep: Masjid Kamalulislam and Wat Bumpennue. Dissolved oxygen (DO) and biochemical oxygen demand (BOD) indicated that the water quality of the former was better compared to the latter. Accordingly, total length, total weight, and condition factor were all higher in fish caught from Masjid Kamalulislam than in those from Wat Bumpennue. The hematologic profiling showed no significant difference between fish from the two stations, but the presence of some leucocytes suggested the existence of inflammation in fish from both stations. Importantly, fish from Wat Bumpennue showed higher prevalence of histopathological alterations, such as aneurysm, edema, hyperplasia, and fusion of filaments in gills; blood congestion and granuloma formation in the liver; renal degeneration and karyolysis in the renal tubule; and melanomacrophage centers (MMCS) in the liver and kidney. The use of integrated biomarkers thus illustrated the ongoing detrimental effects of pollution on the striped catfish, emphasizing the importance of conserving water resources.

摘要

曼谷的空盛塞普（Khlong Saen Saep）是一条受污染的运河，其水质在许多地区均未达到标准标准。因此，我们评估了污染对条纹cat鱼Pangasianodon hypophthalmus的影响（Sauvage，1878）通常在运河的污染地区发现。从空塞圣塞普（Khlong Saen Saep）的两个站点取样鱼：Masjid Kamalulislam和Wat Bumpennue。溶解氧（DO）和生化需氧量（BOD）表明，前者的水质优于后者。因此，从Masjid Kamalulislam捕捞的鱼的总长度，总重量和条件因子都比从Wat Bumpennue捕捞的鱼高。血液学分析显示两个站位的鱼之间没有显着差异，但是一些白细胞的存在表明两个站位的鱼中都存在炎症。重要的是，Wat Bumpennue的鱼表现出较高的组织病理学改变，例如动脉瘤，水肿，增生和g丝融合。肝脏中的血液充血和肉芽肿形成；肾小管中的肾脏变性和核溶解；肝脏和肾脏中的黑色素巨噬细胞中心（MMCS）。因此，综合生物标记物的使用说明了污染对条纹cat鱼的持续有害影响，强调了节约水资源的重要性。