Valentin Haecker

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Ferdinand Carl Valentin Haecker , occasionally also written to Valentin Häcker , (born September 15, 1864 in Hungarian-Altenburg, today Mosonmagyaróvár , Hungary ; † December 19, 1927 in Halle (Saale) ) was a German zoologist .


Valentin Haecker was the son of a professor at an agricultural academy (now the Faculty of Agriculture and Nutrition at the West Hungarian University ). He studied zoology and botany and received his doctorate in 1889 at the University of Tübingen with a dissertation on the colors of bird feathers. In 1892, as a student of August Weismann at the University of Freiburg, he received the license to teach zoology and comparative anatomy .

In 1900 he accepted an appointment as professor of Stuttgart to the technical college with simultaneous teaching position at the Agricultural University of Hohenheim and the Veterinary University of Stuttgart. In research he now mainly worked as a marine biologist and developmental physiologist .

In 1909 he moved to Halle (Saale), where he had a stately building with a large collection, better equipment and more staff. In 1910 he was elected a member of the Leopoldina . Haecker led the 22nd annual meeting of the German Zoological Society in Halle in 1912 and was elected President in 1922/23. When he became the 231st rector of the University of Halle-Wittenberg in 1926, as was customary for a year at the time , he had to fend off plans by the Prussian Ministry of Culture to close the university.

Haecker died unexpectedly of a stroke a few months after the end of his tenure as rector . His grave in the Gertraudenfriedhof has been under the care of the university's medical faculty since 1964.

Scientific work

His scientific work ranges from cell biology through fertilization and heredity to research on birds on the mechanism of sound production, the color of feathers and color races as well as the heredity of musical talent in humans. His monumental work on radiant animals from the spoils of the Valdivia expedition was widely recognized . Haecker was the founder of phenogenetics .

Fonts (selection)

  • About the colors of bird feathers , dissertation, Bonn and Tübingen 1890 (also in: Archive for microscopic anatomy 35.1)
  • The pelagic polychaete and achaete larvae of the plankton expedition . In: Results of the plankton expedition of the Humboldt Foundation (Volume 2, Booklet d), Lipsius and Tischer, Kiel and Leipzig 1898 (reprint, teaching 1971, ISBN 3-7682-0790-0 )
  • Practice and theory of cell and fertilization theory , Jena 1899
  • The song of the birds, its anatomical and biological basis, Jena 1900
  • General genetics , Braunschweig 1911 (3rd revised edition, Braunschweig 1921)
  • About memory, heredity and pluripotency. August Weismann on his 80th birthday , Jena 1914
  • Heredity in the male line and the concept of family under paternal law . In: Biologische Grenz- und Tagesfragen (Issue 1), Jena 1917
  • Developmental property analysis (phenogenetics). Common tasks in the history of development, heredity and race theory , Jena 1918
  • About reversible processes in the organic world . In: Treatises on theoretical biology (Issue 15), Berlin 1922
  • together with Theodor Draw : On the inheritance and development of musical talent , Leipzig 1923
  • Pluripotency phenomena. Synthetic contributions to genetics and genetics , Jena 1925
  • as co-author / editor: Handbook of Social Hygiene and Health Care
  • * Volume 1: Basics and Methods. Berlin 1925
  • Environment and genetic material, speech (given when the rectorate of the United Friedrichs University Halle-Wittenberg took office on July 12, 1926), Halle (Saale) 1926
  • Goethe's morphological work and recent research , Jena 1927


  • Rudolf Haecker: The life of Valentin Haecker. in: Zoologischer Anzeiger, Volume 174, Issue 1/1965, pp. 1-14, ISSN  0044-5231
  • Georg Uschmann:  Haecker, Ferdinand Carl Valentin. In: New German Biography (NDB). Volume 7, Duncker & Humblot, Berlin 1966, ISBN 3-428-00188-5 , p. 427 f. ( Digitized version ).
  • Valentin Haecker, in Rolf Gattermann & Volker Neumann: History of Zoology and the Zoological Collection at the Martin Luther University Halle-Wittenberg from 1769 to 1990. Treatises of the Saxon Academy of Sciences in Leipzig, Mathematical and Natural Science Class (Volume 63, Booklet 3). Hirzel, Stuttgart et al. 2005, ISBN 3-7776-1391-6 , pp. 70-79
  • Hans-Albrecht Freye: Valentin Haecker 1864 to 1927. Life and work. in: Hercynia, Volume 2, Issue 3/1965, pp. 326-337, ISSN  0018-0637
  • Haecker, Valentin Carl Ferdinand, in Jürgen Dietrich Kurt Kiefer: Bio-bibliographical manual of the Academy of Charitable Sciences in Erfurt. Academy of Charitable Sciences in Erfurt, Erfurt 2005, ISBN 3-932295-61-7 , p. 234

Web links

Wikisource: Valentin Haecker  - Sources and full texts