Random Drift

  • Henry Nicholls
Part of the Macmillan Science book series (MACSCI)


By the time Charles Darwin came to publish his account of the Beagle voyage in 1839 — his ]ournal of Researches — he’d had an important revelation. There is every reason for believing’, he wrote, ‘that several of the islands possess their own peculiar varieties or species of tortoise.’


Random Drift Walk Away Marine Iguana Giant Tortoise Peculiar Variety 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Notes and sources

  1. ‘There is every reason for believing …’: Darwin (1839)Google Scholar
  2. Erroneous classification of tuatara: Daugherty et al. (1990)Google Scholar
  3. Galápagos giant tortoise taxonomy: Pritchard (1996)Google Scholar
  4. Yale analysis of Santa Cruz tortoise genetics: Russello et al. (2005)Google Scholar
  5. ‘In space and time …’: Darwin (1845)Google Scholar
  6. Darwin’s path through the archipelago: Estes et al. (2000)Google Scholar
  7. The significance of the Galápagos to Darwin: Frank Sulloway, personal communication; Sulloway (1982, 1984, 1985)Google Scholar
  8. ‘His primary interest was in the geology …’: Sulloway, personal communicationGoogle Scholar
  9. ‘I frequently got on their backs …’: Darwin (1845)Google Scholar
  10. ‘One large one, I found by pacing Keynes’ (2000)Google Scholar
  11. ‘It was greatly astonished’: Darwin (1845)Google Scholar
  12. ‘I several times caught this same lizard …’: Darwin (1845)Google Scholar
  13. ‘It would appear that the birds of this archipelago …’: Darwin (1845)Google Scholar
  14. ‘In my walk I met two very large Tortoises …’: Keynes (2000)Google Scholar
  15. ‘One was eating a Cactus …’: Barlow (1934)Google Scholar
  16. ‘It was confidently asserted, that the tortoises coming from different islands …’: Darwin (1839)Google Scholar
  17. ‘I have not as yet noticed by far the most remarkable feature …’: Darwin (1845)Google Scholar
  18. ’so it is at least possible that tortoises …’: Thornton (1971)Google Scholar
  19. When extremely heavy rain begins to fall …’: Linda Cayot, personal communicationGoogle Scholar
  20. ‘If those were the only two tortoises …’: Sulloway, personal communicationGoogle Scholar
  21. Tortoise morphology: Fritts (1983, 1984)Google Scholar
  22. Migration of tortoises throughout the archipelago: Caccone et al. (2002)Google Scholar
  23. Ciofi et al. (2002); Beheregaray et al. (2004); Caccone, personal communicationGoogle Scholar
  24. Isabela aliens: Caccone et al. (2002); Caccone, personal communicationGoogle Scholar
  25. USS Essex capturing the Georgiana and Policy: Porter (1813, 1815); Farragut (1879)Google Scholar
  26. ’sail ho! Sail ho!’: Porter (1815)Google Scholar
  27. ‘At eleven A.M., according to my expectation …’: Porter (1815)Google Scholar
  28. ‘In clearing their decks for action …’: Farragut (1879)Google Scholar
  29. ‘At two o’clock, the boats were about a mile …’: Porter (1815)Google Scholar
  30. ‘rowed up beneath the muzzles of the guns …’: Porter (1813)Google Scholar
  31. ‘Thus were two fine British ships …’: Porter (1813)Google Scholar
  32. ‘they had been lying in the same place …’: Porter (1815)Google Scholar
  33. ‘and had supplied themselves abundantly …’: Porter (1815)Google Scholar
  34. Cerro Montura tortoises: Russello et al. (2005)Google Scholar
  35. Cookson’s tortoise observations: Cookson (1876a, 1876b)Google Scholar
  36. ‘As Hood and Abingdon Islands …’: Cookson (1876b)Google Scholar
  37. ‘There is a strong current running northwest …’: Caccone et al. (1999)Google Scholar
  38. Lava lizard parallel: Wright (1983, 1984); Kizirian et al. (2004); David Kizirian, personal communicationGoogle Scholar
  39. Edward Louis’ analysis of tortoise genetics: Edward Louis, personal communicationGoogle Scholar
  40. Yale analysis of ancient DNA from California Academy tortoises: Caccone et al. (1999)Google Scholar

Copyright information

© Henry Nicholls 2010

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  • Henry Nicholls

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