Research finds pesticides in 13 percent of dried-fish samples

A recent study by the Bangladesh Fish Research Institute (BFRI) has found chemical pesticide contamination in 13% of dried-fish samples collected from major production zones across the country. The findings, disclosed at a seminar hosted by the Bangladesh Food Safety Authority (BFSA), underscore growing concerns over food safety in one of the country’s most consumed protein sources.

Out of 260 dried-fish samples tested, pesticides like endosulfan sulfate, dieldrin, heptachlor epoxide, and beta-endosulfan were found in varying amounts, particularly in samples from Cox’s Bazar, Chattogram, Dublar Char, Sunamganj, and Chalan Beel. However, the remaining 87% of samples were found to be free from harmful pesticide residues.

Researchers noted that the level of pesticide contamination significantly drops after cooking. Still, they cautioned that the use of harmful chemicals in food processing, even at earlier stages, poses serious health risks.

One key factor contributing to contamination is the traditional sun-drying process used by many untrained and uneducated producers, especially during the October-March drying season when natural sunlight is limited. In such conditions, pesticides are often used as a shortcut to preserve fish and prevent spoilage.

Experts at the seminar recommended transitioning to mechanical fish drying methods, which can provide more consistent and hygienic results without relying on harmful substances. BFSA Chairman Zakaria stated that the study, though limited in scope, highlights a pressing issue. He warned that the use of pesticides in dried fish will be treated as a punishable offense moving forward.

Dr Md Nazmul Bari of the Bangladesh Rice Research Institute also urged further studies on polythene use and microplastic contamination, stressing the broader environmental implications tied to food production methods.

The most commonly consumed varieties of dried fish differ by region-Chhuri Shutki (ribbon fish) in Chattogram and Cox’s Bazar, Taki Shutki in Chalan Beel, and Loittya Shutki (Bombay duck) in Dublar Char-reflecting regional preferences and local availability.

This study is one of several under the BFSA‍‍`s 2022-23 research initiative and may lead to expanded investigations depending on stakeholder responses.