An Evaluation of an Experimental Model for Sympatric Speciation

Contents

• [covers]
• • An Evaluation of an Experimental Model for Sympatric Speciation p. 1
  • Abstract
  • Introduction
  • Method p. 2
    • Origin of Flies p. 2
    • Variations in Method
    • Parameters Recorded p. 3
    • Additional Tests
      • (a) Testing equal amounts of each attractant
      • (b) Eggs as attractants
      • (c) Strength of chemical vs egg attractants
  • Results p. 6
    • Selection Experiment p. 6
    • Additional Tests
      • (a) Equal amounts of each attractant
      • (b) Egg attractant effects p. 7
      • (c) Strength of chemical vs egg attractants
  • Discussion p. 8
    • Effectiveness of Selection p. 8
    • Testing Equal Amounts of Each Attractant
    • Other Differences Between the Two Populations p. 9
    • Gene Drift — Possible Explanation of the Variability
    • Differences Between Generations That Suggest Gene Drift
    • A Further Practical Problem — Egg Attractant Effects p. 10
  • Conclusions
  • Acknowledgments p. 11
• • References
  • Appendix
    • I. Results of experiment with banana and fishmeal
    • II. (a) Correct and total numbers of eggs laid in the ammonium carbonate strain during the selection experiment p. 12
    • II. (b) Correct and total numbers of eggs laid in the amyl alcohol strain during the selection experiment
    • III. Average migration % per generation

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