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Proposed Hidrovia: Maintenance Requires 14 dredges per day for 365 days

The proposed Hidrovia entails maintenance requiring 14 dredges daily for 365 days, costing $127,750,000 annually. It could lead to reduced flooded areas and habitats by up to 50%, salinization of soils, and impacting 40% of fish species, including commercially important ones. The region's fisheries, with 9 key species, could face significant consequences affecting a total annual value of $685,000,000. Various conclusions highlight the importance of maintaining flooded areas for biodiversity and sustainable fisheries, emphasizing the need for integrated use planning and economic valuation.

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Proposed Hidrovia: Maintenance Requires 14 dredges per day for 365 days

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  1. Proposed Hidrovia: Maintenance Requires 14 dredges per day for 365 days Estimated Cost: $127,750,000 per year 101

  2. Potential Effects of Hidrovia in Pantanal • A Channel of only 2.5 m would • Reduction of Flooded Areas & Habitats • up to 50% • Salinization of Soils • Source: Hamilton (1999) 102

  3. Commercial and Sports Fisheries • 9 Species represent 80% of catch, e.g. • Dourado: Salminus maxillosus • Curimbata: Prochilodus lineatus • Pacu: Piaractus mesopotamicus • Pintado: Pseudoplatystoma corruscans • Cachara: P. fasciatum • Jau: Paulicia luetkeni 103

  4. Commercial and Sport Fisheries • Each of the 9 nine species undergoes dramatic seasonal migrations up the Rio Paraguay and into the Flooded Areas • Reproductive success depends upon the natural cycle of flooding 104

  5. Potential Effects of Hidrovia in Pantanal • A Channel of only 2.5 m would • Reduction of Flooded Areas & Habitats • up to 50% • Reduction of up 40% of Fish Species, including the commercially important species and sports fishery 105

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  7. Potential Sustainable Fisheries Value Commercial Fisheries $660,000,000 Sports Fishery $ 25,000,000 Total Annual Value $685,000,000 107

  8. Estimated Annual Costs of Hidrovia: Dredging: $127,750,000 Fisheries: $340,000,000 Total: $467,000,000 108

  9. Proposed Hidrovia 2250 km 1444 mi 109

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  11. 111

  12. 1867 & 1903 1938 1884 112

  13. Proposed Hidrovia 2250 km 1444 mi 113

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  16. Conclusions • Aquatic Flora and Fauna are neither homogeneously nor randomly distributed • Subregions • Macrohabitats • Flooded vegetation and unmodified riparian forest increase the abundance and species richness of fishes 116

  17. Conclusions • Maintenance of flooded areas and natural flood cycle is critical • A. Biodiversity • B. Areas of Reproduction • C. Nursery Areas 117

  18. Conclusions • 4. Maintenance of Main Channel is critical for many commercially important species • Develop a plan for integrated use such that set aside: • A. Headwaters • B. Flooded areas 118

  19. Conclusions • Economic value of sustainable fisheries is considerable and must be factored in economic models • Protection of hydrologic system is beneficial for biodiversity, agriculture and cattle ranching! 119

  20. “There already is a Hidrovia, modify the boats not the river!” Dr. Mario Dantas Director, EMBRAPA 120

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