4. In those part of the river where the depth is more than 4m, low coast cages can be erected by the local fishermen for fish culture. Species such as giant prawn, milk fish, pearl spot, etc can be reared in high density. This will provide employment avocation to the fisherwomen of the area.
Setting up of fish and shell fish sanctuaries, freshwater reserves cum recreational centers, etc; in the river proper
Suitable regions of the river stretch can be identified for establishing fish sanctuaries. The areas so selected can provide with tripods or other structures favouring spawning environment. The fishing of such regions can be stopped by erecting either fences or coconut stumps so that the spawing stocks will not be exploited. The centers so developed will serve as regular source of recruits of various fin and shell fishes to the river which can take care of the sustainability since there will be regular recharging of seedlings to the open water body. Such regions can also be utilized as recreational centers as part of ecotourism by introducing species such as freshwater sharks, Sea bass, etc;
Follow up studies:
Regular monitoring of Habitat quality scoring Index, biotic integrity scoring and diversity indices shall be done at monthly intervals in order to assess the status of aquatic ecosystem and the biotic integrity. The results so compiled should publish in the medias at par with the daily temperature and rainfalls. While doing so, the public will able to understand the status of river from time to time.
Impact assessment studies on aquatic biodiversity and fisheries
Effects of freshwater reserves and sanctuaries on regeneration of fishery wealth
Socio economic status of fishermen population subsisting on Periyar lake
Quality assessment of food fishes and other aquatic organisms harvested from the study area for human consumption.
Periyar – An Action Plan. By Dr. N. Chandramohanakumar (School of Marine Fisheries CUSAT)
There shall be seven broad program areas in the Plan. These are sediment management, water quality assessment, agricultural non point sources, biological assessment, hydrology and hydrodynamic modeling, interagency coordination and public awareness, and environmental education. Within each of these program areas, there shall be a number of projects which are intended to provide recourse managers with the understanding necessary to develop or implement workable restoration and protection strategies.
This includes a basin-wide assessment of sediments and, within priority sub basins, intensive sediment surveys. Sediment samples are collected and analyzed for priority pollutants that may exist at levels which are known to be harmful to organisms. Once identified, areas of contaminated sediments are mapped and contaminants quantified area are described and their project managers identified.
Included in this work area is an assessment of submersed aquatic vegetation (SAV). SAV is the most important component of the river’s natural systems,