The Department of Aquatic Biology and Fisheries (University of Kerala) and Agency for Development of Aqua Culture, Kerala, have identified the use of small mesh encircling nets as one of the biggest threats to the biodiversity of Vellayani lake, the second largest fresh water body in the State.
A participatory fish census conducted by the institutions has found that many perennial streams, which supplied water to the lake, have dried up. Paddy fields and wetlands have been land filled. The research team also noticed an alarming depletion of frogs in the lake. Pesticide contamination of the lake and shrinking of its area were other major issues affecting the water body’s survival.