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- Arnold_Adolph_Berthold abstract "Arnold Adolph Berthold or Arnold Adolf Berthold (26 February 1803 – 3 January 1861) was a German physiologist and zoologist. He studied medicine in Göttingen in 1819 and wrote his thesis under the direction of Johann Friedrich Blumenbach (1752-1840). Berthold became a private lecturer in 1825 and began to teach physiology at the University of Göttingen where he spent the rest of his career. He is known as a pioneer in endocrinology due to his experiments on the role of the gonads in the development of secondary sexual characteristics. He published important works on reptiles and amphibians as well as on avian physiology. In the field of entomology, he authored Natürliche Familien des Tierreichs (1827).Berthold is particularly famous for his work on endocrinology. It has been argued that Berthold, in 1849, was the first to engage in the formal study of behavioral endocrinology when he performed ground breaking experiments with chicken castration. Berthold noted that the male chickens (roosters) were: aggressive; had pronounced comb and wattle; muscles were more developed; crows; copulate with hens. On the other hand, Berthold noted that the female chickens (hens) were: not aggressive; had no comb and wattle; did not crow; did not copulate with hens. Using Berthold's Strong Inference Approach, Berthold proposed that: there must be some 'unseen' differences between hens and roosters that can account for the observed differences; the difference should be eliminated if source is removed before differences are seen; and differences should be reinstated if missing product is restored and is functional. Berhold's experiment showed that when castrated roosters developed the body and behavior of capons: they failed to develop comb and wattle characteristics of roosters; failed to crow; failed to be aggressive; and failed to copulate. Also, Berhold's experiment showed that transplanted testes (that established a blood connection) became functional (i.e., produced sperm and a blood-borne product that affects anatomy and behavior).".
- Arnold_Adolph_Berthold birthDate "1803-02-26".
- Arnold_Adolph_Berthold birthPlace Soest,_Germany.
- Arnold_Adolph_Berthold birthYear "1803".
- Arnold_Adolph_Berthold deathDate "1861-01-03".
- Arnold_Adolph_Berthold deathPlace G%C3%B6ttingen.
- Arnold_Adolph_Berthold deathPlace Göttingen.
- Arnold_Adolph_Berthold deathYear "1861".
- Arnold_Adolph_Berthold field Medicine.
- Arnold_Adolph_Berthold field Physiology.
- Arnold_Adolph_Berthold field Zoology.
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- Arnold_Adolph_Berthold authorAbbreviationZoo "Berthold".
- Arnold_Adolph_Berthold birthDate "1803-02-26".
- Arnold_Adolph_Berthold birthPlace Soest,_Germany.
- Arnold_Adolph_Berthold citizenship "Germany".
- Arnold_Adolph_Berthold dateOfBirth "1803-02-26".
- Arnold_Adolph_Berthold dateOfDeath "1861-01-03".
- Arnold_Adolph_Berthold deathDate "1861-01-03".
- Arnold_Adolph_Berthold deathPlace "Göttingen, Germany".
- Arnold_Adolph_Berthold field "Physiology, Zoology, Medicine".
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- Arnold_Adolph_Berthold name "Arnold Adolph Berthold".
- Arnold_Adolph_Berthold name "Berthold, Arnold Adolph".
- Arnold_Adolph_Berthold nationality "German".
- Arnold_Adolph_Berthold pages "72".
- Arnold_Adolph_Berthold placeOfBirth Soest,_Germany.
- Arnold_Adolph_Berthold placeOfDeath "Göttingen, Germany".
- Arnold_Adolph_Berthold shortDescription "German Physiologist , Zoologist".
- Arnold_Adolph_Berthold title "Berthold, Arnold Adolphe".
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- Arnold_Adolph_Berthold description "German Physiologist , Zoologist".
- Arnold_Adolph_Berthold description "German Physiologist , Zoologist".
- Arnold_Adolph_Berthold subject Category:1803_births.
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- Arnold_Adolph_Berthold comment "Arnold Adolph Berthold or Arnold Adolf Berthold (26 February 1803 – 3 January 1861) was a German physiologist and zoologist. He studied medicine in Göttingen in 1819 and wrote his thesis under the direction of Johann Friedrich Blumenbach (1752-1840). Berthold became a private lecturer in 1825 and began to teach physiology at the University of Göttingen where he spent the rest of his career.".
- Arnold_Adolph_Berthold label "Arnold Adolf Berthold".
- Arnold_Adolph_Berthold label "Arnold Adolph Berthold".
- Arnold_Adolph_Berthold label "Arnold Adolph Berthold".
- Arnold_Adolph_Berthold label "Arnold Adolph Berthold".
- Arnold_Adolph_Berthold label "Бертольд, Арнольд Адольф".
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- Arnold_Adolph_Berthold givenName "Arnold Adolph".
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- Arnold_Adolph_Berthold name "Arnold Adolph Berthold".
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- Arnold_Adolph_Berthold surname "Berthold".