Objective To study the intake of limnetic products among residents in Shanghai and provide basis for risk assessment of food stuff.
Methods According to the distribution of residing districts and sub-districts in Shanghai, 2 630 general subjects and 399 specific subjects (pregnant women) were chosen via stratified random sampling method. Questionnaires were designed by kinds of food for three consecutive days through bookkeeping method to collect the dietary consumption of limnetic products, including annual consumption rate, daily intake and frequency of intake.
Results Annual consumption rates of freshwater fish, fr eshwater shrimp, freshwater crab and margarya were 84.94%, 83.80%, 59.51% and 41.90%, respectively. Daily intakes per capita of freshwater fish, freshwater shrimp, freshwater crab and margarya were 21.78 g, 14.46 g, 4.51 g and 2.63 g, correspondingly, which was significantly different from each other (P < 0.05). Daily intake per capita was varied significantly when stratified by age (P < 0.05), but insignificantly by gender (P > 0.05). The amount of daily intake of freshwater fish, freshwater shrimp, freshwater crab and margarya of pregnant women were 30.18 g, 24.55 g, 6.00 g and 0.79 g per capita, respectively, which was significantly different from each other (P < 0.05).
Conclusion Daily intake of various kinds of limnetic products varies significantly among Shanghai residents, and daily intake per capita of different age group for the same kind of limnetic products is also significantly different. The pregnant women consume much more limnetic products than other people on average. Risk assessment of limnetic products, therefore, should be conducted specifically by the age of subjects and the kind of food.
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