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Guanacos were introduced to Staats Island (Falkland Islands)

Guanacos were introduced to Staats Island (Falkland Islands). Staats Island. Bill Franklin Ph.D. Professor Emeritus – Iowa State University . Study Objective : Measure the reproductive and congenital consequences resulted from intensive inbreeding in a closed-wild population of guanacos

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Guanacos were introduced to Staats Island (Falkland Islands)

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  1. Guanacos were introduced to Staats Island (Falkland Islands) Staats Island

  2. Bill Franklin Ph.D.Professor Emeritus – Iowa State University Study Objective: Measure the reproductive and congenital consequences resulted from intensive inbreeding in a closed-wild population of guanacos Observations: • In the late 1930s 15 guanacos from southern Patagonia introduced to Staats • Small island (5 km2) containing equivalent plant communities to the Patagonia • Population grew 16 to 18% per year for 25 years • In the late 1950’s 400 animals were removed by hunting, leaving 10–20 animals • Over the next 45 years the population grew reaching 413 in 2004 • Population declining since 200 • The 2008 census included 325 animals • In 2008 abnormal newborns represented 18% of all chulengos born Conclusion: Unavoidable inbreeding most likely resulted in a genetic driven, high rate of congenital defects and deaths Reference Franklin, W. 2011 Congenital Consequences of Two-Founder Effects on Guanacos Inhabiting a Small Island for 70 Years. Camelid Conference, Houston, TX Bill's Bio

  3. Total Data Components 6 years of collections - 1999, 2002, 2003, 2004, 2005, 2008 = ~300 skulls total Relative age of guanaco - chulengo, juvenile, adult, Male vs. Female 9 skull measurements - Skull Length ,Skull Width, Skull Ant. Edge of 1st Canine, Molar Opening, Skull Canine 1, Skull Canine 2, Mandible Ant. Edge of 1st Canine, Mandible Molar Opening, Mandible Canine 1

  4. Visualizing complex data with Google Motion Chart Our Data Analysis 4 years of collections - 1999, 2003, 2004, 2008 = 210 skulls total Relative age of guanaco -juvenileand adult Number of skulls for each category 6 skull measurements - Skull Length ,Skull Width, Skull Ant. Edge of 1st Canine, Molar Opening, Mandible Ant. Edge of 1st Canine, Mandible Molar Opening Motion Chart Support

  5. Conclusions “The value of a question is determined not only by the specificity and richness of the answers it produces but also by the quantity and quality of the new questions it raises” Neil Postman - Reasons for intrinsic variability within juvenile data? - Are juveniles dying younger? - Effects of climate? - Predation? - Change in vegetation? Conclusion – We need more DATA!

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