Abstract
The concentrations of organochlorine insecticides DDT and heptachlor were investigated to estimate the current status of insecticides used in dry fish. The most popular dry fish– ribbon fish (Chhuri), shrimp (Chingri) and bombay duck (Loittya) were selected for this study and these dry fishes were collected from different markets of Dhaka and Chittagong. The range of DDT used in all the samples was 3.038 ppb to 874.966 ppb. The range of DDT in ribbon fish 131.611 ppb to 149.430 ppb, in shrimp 3.038 ppb to 318.206 ppb and in bombay duck 61.918 ppb to 874.966 ppb was found. The range of heptachlor used in all the samples was 0.682 ppb to 5.464 ppb. The range of heptachlor in ribbon fish 1.710 ppb to 2.306 ppb, in shrimp 0.682 ppb to 3.806 ppb and in bombay duck 1.762 ppb to 5.464 ppb was found. The heptachlor was not found in ribbon fish (CTG-2), shrimp (DHK-2 and CTG-1) and bombay duck (DHK-1). The concentration of heptachlor in dry fish compare to DDT was found too much less.
Highlights
The natural gifts of aquatic resources, fish and other fishery items have played an important role on the culture and life style of the people of Bangladesh
61.9 2.3 and 137.5 ppb respectively; in the samples of shrimp collected from DHK-1, DHK-2, CTG-1 and CTG-2 were 3.04, 69.4, 3.8 and 318.2 ppb respectively and in the samples of bombay duck collected from DHK-1, DHK-2, CTG-1 and CTG-2 were 156.6, 182.3, 875.0 and 61.9 ppb respectively
The concentrations of DDT in the samples of ribbon fish collected from DHK-1, DHK-2, CTG-1 and CTG-2 were 149.4, 131.6, 140.4
Summary
The natural gifts of aquatic resources, fish and other fishery items have played an important role on the culture and life style of the people of Bangladesh. Huge amount of fish catches from fresh and marine water during winter season when the natural depression attain shallow water and even dry up, naturally the fish catch attains peak. During this time the Bay of Bengal, the coastal crisscross channels and other depressions remain calm and quiet and as a result fishing activities are strengthened and huge fishes are harvested during this period than the other seasons. The necessity to cultivate dry fish looms up when huge quantity of fresh fish caught everyday remains unsold because of shortage of customers. The dry fish is properly known as “SHUTKI” (in Bangla)
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