Please use this identifier to cite or link to this item: http://dspace.cvasu.ac.bd/jspui/handle/123456789/834
Title: ASSESMENT OF HEAVY METAL ACCUMULATION IN DIFFERENT ORGANS OF CULTURED PANGUS (THAI) AND TILAPIA ALONG WITH OBSERVATION OF THE ENZYMATIC ACTIVITIES IN THOSE ORGANS
Authors: Maria Al Mazed
Keywords: Heavy metals; Cultured Thai pangus & Tilapia; Investigated Organs, Alkaline phosphatase (ALP Activity) and ATPase
Issue Date: Dec-2019
Publisher: Chattogram Veterinary & Animal Sciences University
Abstract: Heavy metal pollution in aquatic environment has emerged as a worldwide concern in recent times. The aquaculture commodities in Bangladesh are serving exclusively to supplement the country’s animal protein demand. Therefore, to evaluate the safety issues in terms of heavy metal accumulation, two important aquaculture species of the country (Tilapia and Thai Pangus) were examined in this study. The concentration of heavy metals were determined by traditional tissue processing through dissection, drying and acid digestion followed by Atomic Absorption Spectrometry (AAS) analysis. In terms of organs of the investigated fishes, the heavy metals were mostly concentrated in the kidney tissues but the concentration in muscles were found to be the lowest which is indeed a positive finding as humans consume the muscles widely even though the concentration of Arsenic in muscles were recorded higher than the safety values recommended by FAO/WHO for both the cases. It has been revealed that the values recorded for Arsenic exceeded the limits in every case because the water itself used for culture may contain Arsenic particularly as the study site was a coastal basin like Chattogram along with indiscriminate use of Arsenic pesticides, large-scale industrial activities, mining operations and so-on. Fortunately, the values of other two investigated heavy metals- Lead and Chromium remained within the safety levels. The study was also intended to observe the enzymatic activities of different organs of these two fishes by following the standard procedures described in previous literatures. The ATPase activity was recorded the highest in the kidney tissues followed by the livers and gills while the lowest was observed in muscle tissues for both fishes. In case of ALP, the highest value was recorded in the livers for Pangus and in kidneys for Tilapia respectively. Likewise the ATPase activity, the lowest values for ALP activity were recorded for muscle tissues in both investigated fishes. This was mainly because the mitochondria of kidney and liver tissues are better catalyzer of enzymes than the mitochondria of muscle tissues. In conclusion, the study suggests that the source of water used for culturing these highly growing aquaculture species should be free from heavy metal pollution for ensuring public safety even though the enzymatic activities recorded in different organs are considerably aligned with the normal range.
URI: http://dspace.cvasu.ac.bd/jspui/handle/123456789/834
Appears in Collections:Thesis-MS

Files in This Item:
File Description SizeFormat 
1.pdf473.68 kBAdobe PDFView/Open
final corrected.pdf1.28 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.