Ecology and Cost-limited Restoration of Daha River for Fish Productivity

Abstract

The Sona river, a threatened seasonal river of eutrophicated nature in the Siwan district of Bihar was studied for its degradation and possible restoration Practices. The study revealed high rate of sedimentation and agricultural activities, changes in water quality and biotic community were observed. The agricultural activities have led to high input of N and P fertilizers along with pesticides being used by the farmers. The positives response of restoration practices was observed with partial improvement in fish-productivity due to hindrance factors acting upon severe fish species.