1. Marie Jones Hanover College, Biology Department Hanover, IN 47243

2. Introduction Imperiled = 1:1 ratio of males to females If imperiled could aid dolphins Ensure they get enough sustenance Move to a better location Protect them in the area Interested in population in Florida Keys http://www.liberalbaptistrev.com/wp-content/uploads/2011/12/dolphin-pod-2.jpg

3. Hypotheses H 0 : The sample data come from a population of dolphins with a 1:1 male to female ratio. H A : The sample data did not come from a population of dolphins with a 1:1 male to female ratio. H 0 : ∏ 1 = ½, ∏ 2 = ½ H A : ∏ 1 ≠ ½, ∏ 2 ≠ ½ http://www.brandoncole.com/profile%20photos/DOLPH INS/atlantic%20spotted/pk10565-D- atlantic_spotted_dolphins_underwater_brandon_cole.jpg

4. Objectives To determine if the sex ratio of a population of dolphins in the Florida Keys is indicative of an imperiled population http://www.digitaltrends.com/wp- content/uploads/2011/05/Dolphins-talk-language.jpg http://3.bp.blogspot.com/_SO53L7Wuf4I/Snz87dBvfZI/AA AAAAAABo8/KmC2wrdei7I/s400/Bottlenose%20Dolphins. jpg

5. Methods Sample Area – 500 m 2 section of the Florida Keys Caught to determine sex Dolphin Wranglers (riding giant seahorses) Aquaman Tagged to ensure no duplicates http://t2.gstatic.com/images?q=tbn:ANd9GcS 8QkZJSwWs83tte5iepgKLtx2Q7mpPUPeySzC RTN_dHwaHzvarTA

6. Statistical Methods Used Chi Square: d.f. = 1 Χ 2 crit = Χ 2 0.05,1 = 3.841 http://images2.fanpop.com/image/photos/10300000/-Dolphins-dolphins- 10346667-1024-768.jpg

7. Results

8. Results Continued SexNumbern Male55 Female45 n100

9. Conclusion X 2 c 0.05 The sample data were not significantly different (X 2 c = 0.810, P > 0.05) from a 1:1 ratio of males to females Sample population was an imperiled population

10. Acknowledgements Dr. Rubino Dolphins Dolphin Wranglers (and their seahorses) Aquaman http://www.myfunnypets.net/wp- content/uploads/2010/12/dolphins.jpg