Abstract
This research focuses on hematological characteristics, erythrocyte morphology and some biochemical parameters of red drum Sciaenops ocellatus (Perciformes: Sciaenidae), cultured in natural water environment in areas near river mouth (L1), estuaries (L2) in Ha Tinh province and coastal areas (L3) in Nha Trang city, Khanh Hoa province of Vietnam. A total of 18 speciments were examined in research, six in each location. Blood was drawn from the tail vein, using a microscope to research morphology and automated gauges to determine blood biochemical parameters. Analysis of blood samples showed that the rate of red drum's erythrocyte morphology disorders in all three locations was quite high. The two main types of disorders were nuclear deformity and nuclear-matter distribution. Changes in erythrocyte size, shape and nuclear were related to salt concentration at culture locations. Blood hemoglobin content was stable in all three regions. Other hematological parameters such as the number of erythrocytes, blood biochemical parameters (glucose, SGOT, SGPT, urea, creatine, plasma iron, albumin, and protein) have differences among the locations, which showed the different reactions of the same species with different environmental conditions.
Highlights
The speed of urbanization and industrialization in the shore areas has always been in direct proportion to the environment pressure
The purpose of this study is to describe the comparison of the hematological parameters of red drum, Sciaenops ocellatus (Linnaeus, 1766) (Perciformes: Sciaenidae), cultured in natural water in areas with high pollution risk: the area near the river mouth with the waste-water generated from daily-life activities, estuarine areas near factories, industrial parks and nearshore areas - where many tourism and wharves take place activities (Nha Trang city, Khanh Hoa, Vietnam)
The number of erythrocytes, the percentage of leukocytes and thrombocytes compared with erythrocytes, hemoglobin, biochemical parameters such as glucose, SGPT
Summary
The speed of urbanization and industrialization in the shore areas has always been in direct proportion to the environment pressure. Waste from factories in industrial parks becomes the main sources of metal pollution to water in nature (Livingstone, 2001). Wastewater from urban area flows to the sea through a system of channels, rivers and streams. Wastewater from processing plants or industrial zones which can be treated or not completely treated, or even untreated, is discharged into the sea. The water system in aquaculture exposes to a number of pollutants mainly discharged from factories, sewage treatment plants, and drainage water from urban areas and agriculture. These pollutants cause serious impacts to aquatic animals (Karbassi et al.,2006; A1Masri et al, 2002)
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