considered. 718 dams (Assam Tribune, 2010) are
proposed to be constructed. This might be a serious
threat and its further effects cannot be visualized. A
series of threats has been discussed in our reports in
2007 (Goswami et al., 2007). The recent threats from the
construction of hydro electric dams on the Teesta,
Brahmaputra river system, in rivers of Arunachal Pradesh
and in Manipur are some of the on going problems. The
major river system of Arunachal Pradesh is under
consideration for the construction of hydro electric power
dams. Irregular water discharges as well as uncontrolled
flow are creating large scale deaths to the fries and
fingerlings of various species of fish. The present water
sources of north eastern states covering the different
ecosystem have been described in Table 4.