questions: asking about integrated duck cum fish farming 
 answers: told him that fish fingerlings (rohu, catla, mrigal) and silver carp, grass carp, common carp should be stocked @ 800-1000 no/bigha. the stocking of 20-30 ducks/bigha gives 100 - 150kg of droppings per year.  the important breeds of indian ducks are sylhet mete and nageswari, good layers such as exotic khaki campbell can also be used. a mixture of any standard balanced poultry feed and rice bran in the ratio of 1:2 by weight can be fed to the ducks as supplementary feed at the rate of 100 gm/ bird/day. fish yield ranging from 350 - 400 kg/bigha/yr and 200- 300 kg/bigha/yr are generally obtained with 6 - species and 3 - species stocking respectively.