Sit Aquaculture

Potential Applications of Spatial Information Technology in Aquaculture and Inland Fisheries By M.N.Reddy, G.P.Reddy and B.S.Sontakki M.N.Reddy NAARM,Hyderabad

Spatial Information Technology Geographical Information system(GIS) + Global Positioning system(GPS)+ Remote Sensing(RS)

Sustainable management of Natural :Resources

Some Potential applications • Spatial distribution and Resource inventory of water bodies including small water bodies • Site selection for targeted fish species • Trade-offs among alternative uses of natural resources • Environmental impact assessment • Sustainable fish farming development through selection of suitable sites for fish ponds etc.

Inventory of Water Bodies ·

How many water bodies are there?

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Where are they?

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What is their size distribution?

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What amount of water do they maintain during the dry season?

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Are their present uses compatible with fisheries and aquaculture?

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How productive are they biologically?

Objectives: • To estimate area under Aquaculture in mandals(Blocks) of East and West Godavari districts of Andhra Pradesh • To select representative samples for primary data collection

Data • IRS P6 (Resource Sat) data (Sensor: AWiFS, resolution:70m • AP Mandal Map (Block) • AP District Map

Andhra Pradesh District Map

East Godavari West Godavari

Andhra Pradesh Mandal Map

East Godavari and West Godavari Mandals Shape file

IRS-P6 Data product Product Code : STPCD027J

East Godavari West Godavari

East Godavari and West Godavari Districts image

Mandal Subset Yelamanchili Mandal from West Godavari District

Legend Rice Fields Water Body Forest Settlements Fallow land Sandy Area

West Godavari District

Yelamanchili Mandal Water body Map ! . ! .

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Yelamanchili Mandal Landuse Map

Pond Location

Sites Favorable for Tropical Shrimp Farming (CNES – IFREMER, 1987)

LAND SUITABILITY ANALYSIS FOR AQUACULTURE

Themes(maps) to be overlaid in GIS •Water resources (rivers, streams, lakes , dams etc.) •Land use type (agriculture, irrigation, shrimp farming, forestry etc.) •Environmental characteristics (temperature, elevation, soils etc.) •Protected areas (Mangroves, conservation zones etc.) •Pollution sources (location of industries, sugar factories, domestic waste etc.) Urban development (Cities, towns and villages)

Land Suitability Maps (Nath et al.2000)

Suitable lands for Brackish Water aquaculture

Suitable lands for Brackish Water Shrimp culture

Land suitability for development of watershed pond aquaculture

1. Suitability of Soils for Catfish farming development

2. Suitability of Soils for Catfish farming compared with the locations of existing farms

Lake Dynamics Using RS and GIS

Objective:To test the feasibility of using RS data to study shoreline dynamics

Map of the Dynamics of the Lake

Identifying Areas for Fish Pond Development • Ground water depth. • Water quality. • Soil chemical characteristics - as they affect water productivity and quality. • Distance from feed suppliers and fish processing plants - as they affect transport costs. • Spatial development cost variations, e.g. cost penalties for siting within the 100year floodplain area. • A slope map could have been incorporated to eliminate the subjectivity in assessing relative ratings

Environmental Impact Analysis of Shrimp Farming ( Tripati, 2005) Environmental degradation: • Loss of Mangrove forest of fertile Land • Degradation of soil due to sedimentation • Determination of water quality

PRA integrated to GIS : Mangrove Management (Agdalle & Boromthanarat, 2003) PRA Data

Ground truthing

Topographic Map

Accuracy Assessment

Digitized

Mangrove Database

Base Map

Mangrove Forest Themes

Data Analysis/Overlaying

Final Map

Tables

Results and Conclusion • PRA information on species, density and location of mangrove forest is highly accurate • PRA is not accurate tool for area determination of Mangroves Like GPS and RS technologies • PRA and GIS input provided the framework for integrating data on resources, social, legal and institutional structures

GIS model to assess development patterns of small-scale Rural aquaculture in the wider environment(Bush,2003) GPS: To record Latitude and longitude Information on Fish Ponds • Species stocked • Number of fish stocked • Area of Pond • Types of Food used • Age of Ponds • Main uses of harvestd fish

Research questions: • What area in the district have potential for further activities by the government or development agencies? • How and why are fingerlings of different species traded throughout the district? • What influence does the availability of water resources have on farmer’s adoption of aquaculture? • What are the marketing constraints and potentials for farmers in different parts of the districts?

Feature Trends of GIS Applications in Aquaculture: • Need for workshops • Efforts in Education? • GIS a routine analysis • Collaboration with regard to strategic natural resource management

Thank You