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some conclusions

some conclusions. LARS2 and Fisheries in the LMB three parts to this talk. Importance of fisheries Flood pulse concept River fisheries = food security. Fish Yield Estimates - Mekong. Total  2 million tonnes

kimberley-patrick
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some conclusions

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  1. some conclusions

  2. LARS2 and Fisheries in the LMBthree parts to this talk • Importance of fisheries • Flood pulse concept • River fisheries = food security

  3. Fish Yield Estimates - Mekong • Total  2 million tonnes • Capture Fisheries  1.75 million tonnes(1991 estimate 360,000 tonnes) • Aquaculture  0.25 million tonnes Estimation methods 1. Consumption studies(above figures) 2. Wetland productivity( 150 kg/ha/yr) 3. Landing surveys(difficult)

  4. Fish Consumption Data

  5. How big is the Fishery in the LMB ? World capture fishery, marine and freshwater = 92.3 M tonne(FAO 1999 figures) Mekong fishery = 1.75 M tonne Mekong fishery = 1.9% of world capture fishery

  6. What is the value of the Fishery ? value is about $1,400 million

  7. How many people are involved ? 40 million people involved (full- and part-time)

  8. Biodiversity ? 1200 - 2000 fish species – 2rd richest river system in the World

  9. Why such diversity ? • Stream capture in highlands • High diversity in nearby marine environment(91 families in the Mekong) • Habitat diversity along the river

  10. Flood Pulse concept An Overview

  11. Principles of FPC • Lateral exchange of nutrientsbetween flood plains and river channel • Sediment mainly taken to the flood plain (but some the other way) • Primary production is on the flood plain • River is transport system – nutrients, fish dispersal and refuge areas • “Highway” analogy

  12. Important aspect of FPC • Rivers and Flood Plains are one unit

  13. Types of flood pulse rivers • One flood » many floods per year • Predictable » highly unpredictable flood regime • Mekong = unimodal, highly predictable

  14. A predictable, annual flood favours….. • adaptation of organisms (hence contributing to the biodiversity in the Mekong) • primary production on the flood plain • nutrient use efficiency • Which together make possible……..

  15. The huge fisheries in the Mekong Basin

  16. River Fisheries and food security • River fisheries very important as food • Usually exploited by rural poor, who have few alternative food sources • Important non-commercial trade • Many fisheries have been degraded through river modification works • Now being rehabilitated…Indian example

  17. Three things to remember • Mekong fishery is very important • The annual flood is the primary driver of fisheries productivity in flood plain rivers • Value what we have.....maintain the fisheries for future generations

  18. Thank you

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