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Lorena Rivas

Factors affecting the distribution of the Darwin’s rhea in the Auca Mahuida Reserve in Argentine Patagonia. Lorena Rivas. STUDY AREA. Darwin´s Rhea. Rhea pennata pennata. Adapted to run Flightless. 1.10 m. Diet: Omnivorous. Social Structure: Gregarious. Reproduction:.

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Lorena Rivas

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  1. Factors affecting the distribution of the Darwin’s rhea in the Auca Mahuida Reserve in Argentine Patagonia Lorena Rivas

  2. STUDY AREA

  3. Darwin´s Rhea Rhea pennata pennata

  4. Adapted to run Flightless 1.10 m

  5. Diet: Omnivorous Social Structure: Gregarious

  6. Reproduction: • Territorial males • Harems of 4-5 females

  7. 10-50 eggs per nest Eggs incubated by the male

  8. Almost simultaneous hatching

  9. Habitat: Darwin's Rhea lives in areas of open shrub in the grasslands of Patagonia

  10. Status:Near threatened (IUCN) • Hunting • More predation due to changes in trophic communities

  11. Habitat degradation due to livestock overgrazing • Egg collection

  12. Landholdings

  13. Livestock

  14. Oil industry

  15. Oil trails

  16. (Sheep Units/km2)

  17. p= 0.88

  18. p= 0.14

  19. What we are going to record… • Rhea density in Payunia and Auca Mahuida reserve and intermediate lands • Oil trail density • Livestock density • Habitat quality • Relative abundance of predators

  20. Thanks!! To i To all of you To WCS To all the people who works with me in Argentina Contact: lrivas@wcs.org / rivas_lorena@yahoo.com.ar

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