OXYTETRACYCLINE RESIDUES IN THAI PANGAS PANGASIANODON HYPOPHTHALMUS SAMPLED FROM SYLHET SADAR UPAZILA,BANGLADESH

摘要

Intensive culture of Thai Pangas (Pangasianodon hypophthalmus; Sauvage, 1878) in freshwater ponds is much more popular in the aquaculture sector of Bangladesh (Ali et al. 2016). Like other cultivated catfishes, pangas is popular among fish farmers andwell-known for its faster growth, easy culture system, possessing hardy characteristics, good survival rates, ability to survive at high stocking densities, high disease resistance and tolerance of a wide range of environmental parameters (Begum et al.2012). As a result in existing aquaculture practices of Bangladesh recent extension of commercial pellet-fed culture of pangas and tilapia together now account for near to 29% of total aquaculture production (Belton et al. 2011).In modern culture system antibiotics are being employed prophylactically and therapeutically to protect fish from bacterial diseases and as well as for growth promotion (Avsever et al. 2010). Where, oxytetracycline (OTC), a group of tetracyclines is theprimary used antibacterial in most aquaculture production (Erdogdu 2012). Farm cultured pangas are mainly affected by red spot disease or rectal/anal protrusion problems (Ali et al, 2016). In recent years it is richly used in intensive pangas farms to treat fish disease in freshwater aquaculture of Bangladesh (Ali et al. 2016). But oxytetracycline and other antibiotics have not always been used in a control manner in aquaculture (FAO/WHO 2003).