Joseph Thomas Cunningham

Joseph Thomas Cunningham (1859–1935) was a British marine biologist and zoologist known for his experiments on flatfish and his writings on neo-Lamarckism.[1]

Career

Cunningham worked at the London Hospital Medical College. He completed his science scholarship at Balliol College, Oxford.[2] Cunningham was a neo-Lamarckian. In his book Hormones and Heredity (1921) he proposed that the mechanism for the inheritance of acquired characteristics were hormones. He termed this "chemical Lamarckism".[3]

According to science historian Peter J. Bowler the idea held by Cunningham that hormones transferred from one generation to the next independent of the germ plasm was seen at the time by neo-Lamarckians as a plausible hypothesis, however "its advocates were unable to get beyond the stage of providing indirect evidence for the effect they postulated."[4]

Experiments

In a series of experiments (in 1891, 1893 and 1895) on the action of light on the coloration of flatfish, Cunningham directed light upon the lower sides of flatfishes by means of a glass-bottomed tank placed over a mirror. He discovered that light causes the production of pigments on the lower sides of flatfishes, and gave his results a Lamarckian interpretation.[5][6][7] Other scientists interpreted his results differently.[8] George Romanes wrote approvingly of Cunningham's interpretation, but the geneticist William Bateson was not convinced that the cause of the increase in pigmentation was from the illumination.[9] Thomas Hunt Morgan criticized the experiments and did not believe the results were evidence for Lamarckism.[10]

Opposition to sexual selection

Cunningham challenged the concept of sexual selection.[11] His book Sexual Dimorphism in the Animal Kingdom (1900) attempted to explain secondary sexual characters by Lamarckian principles.[12] The chemist Raphael Meldola noted in a review for Nature that "although many of us may arrive at the conclusion that Mr. Cunningham has not succeeded in establishing his case, it will be generally admitted that he has discussed the problem, on the whole, in a more or less scientific spirit."[13]

He translated Theodor Eimer's Die Enstehung der Arten (1888) into English.

Publications
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Joseph Thomas Cunningham

References
  1. Bidder, G. P. (1935). "Joseph Thomas Cunningham. (1859-1935)". J. Cons. Int. Explor. Mer. 10 (3): 245–248. doi:10.1093/icesjms/10.3.245.
  2. J. T. Cunningham, M.A. Late Lecturer In Biology, London Hospital Medical College. The British Medical Journal. Vol. 2, No. 3887 (Jul. 6, 1935), p. 42.
  3. Reid, R. G. B. (2004). Epigenetics and Environment. In Brian Keith Hall, Roy Douglas Pearson, Gerd B. Müller. In Environment, Development, and Evolution: Toward a Synthesis. MIT Press. p. 19. ISBN 0-262-08319-1
  4. Bowler, Peter J. (1983). The Eclipse of Darwinism: Anti-Darwinian Evolutionary Theories in the Decades Around 1900. p. 102. Johns Hopkins University Press. ISBN 978-0801843914.
  5. Cunningham, Joseph Thomas (1891). "An Experiment concerning the Absence of Color from the lower Sides of Flat-fishes". Zoologischer Anzeiger. 14: 27–32.
  6. Cunningham, Joseph Thomas (May 1893). "Researches on the Coloration of the Skins of Flat Fishes". Journal of the Marine Biological Association of the United Kingdom. Cambridge, UK: Cambridge University Press on behalf of the Marine Biological Association of the United Kingdom. 3 (1): 111–118. doi:10.1017/S0025315400049596.
  7. Cunningham, Joseph Thomas (May 1895). "Additional Evidence on the Influence of Light in producing Pigments on the Lower Sides of Flat Fishes" (PDF). Journal of the Marine Biological Association of the United Kingdom. 4: 53–59. doi:10.1017/S0025315400050761.
  8. Moore, Eldon (September 15, 1928). "The New View of Mendelism". The Spectator (Book review). London. 141 (5229): 337. Retrieved 2015-10-24. Review of Modern Biology (1928) by J. T. Cunningham.
  9. Cock & Forsdyke 2008, pp. 132–133
  10. Morgan 1903, pp. view=1up, seq=277 257–259
  11. Bartley, Mary Margaret. (1994). A Century of Debate: The History of Sexual Selection Theory (1871-1971). Cornell University. p. 49
  12. Review in The Zoologist, 4th series, vol 4, issue 707 (May, 1900), wikisource logo 243/244.
  13. Meldola, Raphael. (1900). Sexual Dimorphism in the Animal Kingdom: A Theory of the Evolution of Secondary Sexual Characters. Nature 63: 197-202.
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