International Journal of Science and Research (IJSR) ISSN (Online): 2319-7064 Index Copernicus Value (2015): 78.96 | Impact Factor (2015): 6.391 Volume 6 Issue 6, June 2017 www.ijsr.net Licensed Under Creative Commons Attribution CC BY Bioaccumulation of Some Organochlorine Pesticides Residues in Shrimp/Prawn of South-west Bangladesh and Assessment of Its Probable Risk on Human Health M. Ariful Islam 1 , Rakhi Das 2 , Md. Motiur Rahman 3 , H. M. Rakibul Islam 4 , Y. Mahmud 5 , K. K. U. Ahmed 6 1, 2, 3, 4, 6 Bangladesh Fisheries Research Institute, Shrimp Research Station, Bagerhat-9300, Bangladesh 5 Bangladesh Fisheries Research Institute, Mymensingh-2201, Bangladesh Abstract: An attempt was made to know the bioaccumulation of some organochlorine pesticides residues in shrimp (Peneus monodon) and prawn (Macrobrachium rosenbergii) by Electron Capture Detector (ECD) of Gas Chromatography during their culture with rice. A Total of six (06) sites viz. Bagerhat Sadar, Kochua, Chitolmari and Rampal Upazila of Bagerhat District as well as Keshobpur and Noapara Upazila of Jessore District were selected for this study from where the shrimp/prawn samples were collected to know the accumulation of some organochlorine pesticides named Heptachlor, DDT, Dieldrin and Endrin. The accumulation of heptachlor residue concentration was 0.016~0.309 ppm; Endrin residue was 0.073 ppm; Dieldrin residue concentration was 0.008~0.017 ppm and DDT residue concentration was not found in the sample Prawn body. In Shrimp sample, accumulation of Heptachlor residue was 0.014~0.031 ppm; Dieldrin concentration was 0.008~0.017 ppm. DDT concentration was 0.005 and Endrin residue was not detected in Prawn body. From the accumulation level of these four pesticide residues concentration in Shrimp and Prawn body, it was noticeable that Heptachlor concentration was in alarming level according to acceptable limit of EU which may cause serious health risk on human. Endrin, Dieldrin and DDT concentration were not in so harmful level in accordance with EU acceptable level. So, proper initiatives should take to inhibit the uses of all classes of hazardous pesticides and chemicals for avoiding any health hazard situation to ensure food safety. Keywords: Bioaccumulation, Shrimp and Prawn; Organochlorine Pesticides: DDT, Heptachlor, Dieldrin, Endrin; GC-ECD detector etc. 1. Introduction In south-west region of Bangladesh around 80% people are practicing Shrimp/Prawn culture with rice as an integrated way for their living. With the growing demand for food, use of chemicals like fertilizer and pesticides in agricultural land has increased since 1954. Constant use of pesticides in crop fields has led to decreased biodiversity of fauna. Pesticides in aquatic ecosystem have become a matter of concern because of their toxicity and tendency to accumulate in food chain. Fishes live in the aquatic column; they are facing challenge for surviving from pollutants, particularly from various chemical fertilizers and pesticides used in or adjacent paddy fields. Pesticides reach aquatic ecosystems by direct application, spray drift, aerial spraying, erosion and run off from agriculture land. These huge amounts of pesticides may get deposited in open water wetlands and rivers of the country [12], [9]. Availability of very limited data [1] indicates that not much has been done in this regards here in Bangladesh. Moreover, there has been no elaborate study on Organochlorine pesticide (OCPs) residues in fishes from Bangladesh except [10]. Organochlorine pesticides (OCPs) including DDT (1,1,1- trichloro-2,2-bis-4-chlorophenyl ethane), aldrin, dieldrin, endrin, lindane, hexachlorobenzene (HCB), chlordane, methoxychlor, toxaphene, heptachlor, heptachlor epoxide and hexachlorocyclohexanes (HCHs) were used in Bangladesh to increase crop production and to eradicate vector diseases from early fifties [13]. However, due to long persistent in the environment, bioaccumulation, and biomagnifications and accumulation to the fatty tissues of human through food chain, the use and production of OCPs became restricted worldwide from nineties [8]. In Bangladesh at present, all Persistent Organic Pollutants (POPs) like DDT and heptachlor import and production have been banned but at least five POPs pesticides including DDT are still in use under a different name or label [3]. In south- west region of Bangladesh like Khulna, Bagerhat and Shatkhira district most of the farmers’ culture shrimp and prawn with rice. As a result they have to use various groups of pesticides to control pest of their rice field which ultimate accumulate in sediment and from sediment it transmitted to shrimp and prawn body. Organochlorine (OC) pesticides are among the agrochemicals that have been used extensively for long periods. They have been used widely in agriculture, as well as, in mosquito, termite and tsetse fly control programs [5]. Residues and metabolites of many OC pesticides are very stable, with long half lives in the environment [4]. Thus, present study was aimed to investigate the level of residual organ chlorine pesticides in shrimp and prawn as well as its probable risk on human health. 2. Materials and Methods 2.1 Sample Collection To determine the bioaccumulation of pesticides residues in shrimp and prawn; samples were collected from Bagerhat Sadar, Kochua, Chitolmari and Rampal Upazila of Bagerhat District as well as Keshobpur and Noapara Upazila of Paper ID: ART20174491 DOI: 10.21275/ART20174491 1127