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Rohu is the most popular food fish in Bangladesh. It is a first growing fish in rivers and even in ponds and other closed water bodies.Now-a-days, the natural habitats are being destroyed due to anthropological effects such as urbanization, overfishing and other developmental activities. Alongside, the hatchery originated rohu fish are often being hybridized with the catla and mrigal to increase production. The ignorant hatchery operators produce seedlings by uncontrolled breeding through interspecific and intergeneric hybridization that cannot ensure expected growth rather loss their genetic...

Among the frogs the Indian bullfrog Hoplobatrachus tigerinus is an important item. It is an important delicious food items especially its leg to many people especially tribal people in Europe and Asia. Some people of Bangladesh used to catch and export frog legs to abroad. It plays an important role in the ecosystem, i.e. controlling of various agricultural pests. H. tigerinus consumes agricultural pests as they are insectivore. Due to climate change the availability of food of the insects are decreasing and they become attracted to higher plants. Frogs mainly H. tigerinus can play a major...