Valdivia Expedition

Source: Wikipedia, the free encyclopedia.

The Valdivia Expedition, or Deutsche Tiefsee-Expedition (German Deep Sea Expedition), was a scientific expedition organised and funded by the

Challenger Expedition
.

In the mid-19th century most scientists adhered to the

Abyssus theory which posited that it was not possible for life to exist below 300 fathoms depth. Carl Chun, a famed teuthologist
, held a deep conviction that there must be life, in abundance, which existed in the unknown abyssal regions of the oceans and he proposed that the German Empire organise its own expedition which was to be nationally funded with the approval of the Kaiser.

SS Valdivia
Carl Chun

Conception and preparation

Chun proposed to the

Gesellschaft Deutscher Naturforscher und Ärzte (Society of German Natural Scientists and Physicians), which was the German equivalent of the Royal Society, that a German deep sea expedition be funded and equipped to explore the deep oceans. His proposal was well received and a resolution to approve the plan and recommend it to the German government was unanimously adopted on 24 September 1897. It was originally conceived as purely zoological expedition but Friedrich Ratzel suggested that chemical and physical observations be included in the expedition's remit and this was accepted. The German government approved the proposal and granted the expedition 300,000 marks in initial funding with promises of further grants to cover the expenses of the expedition and the publication costs of its findings.[1]

The ship, the

SS Valdivia, was chartered from the Hamburg-Amerikanischen Packetfahrt-Actien-Gesellschaft (HAPAG), which fitted the ship out with equipment such as dredging gear, specimen jars, deep sea traps and oceanographic equipment, also outfitting the laboratories, while also providing the crew and provisions, all for a sum equivalent to £17,000, a sum which covered the company's expenses but did not allow for any profit.[2]

Chun was the overall leader of the expedition.[3] A captain of whaling ships, Adalbert Krech, was appointed the ship's captain while the navigator was Walter Sachse who was an employee of HAPAG's. The scientific staff was made up of the botanist Professor W. Schimper of Bonn, the zoologists Carl Apstein, Ernst Vanhöffen and Fritz Braem, the oceanographer Gerhardt Schott, the chemist Paul Schmidt and Dr M. Bathman who was a bacteriologist and the expedition's doctor, who died on the voyage. August Brauer and Otto zur Strassen who were zoologists by profession and Fritz Winter who was an artist and photographer, but these had no official status recorded.[2]

Adalbert Krech 1898

The Voyage

Map of the route taken by the Valdivia Expedition

The Valdivia set sail from

Shetland Islands and then turning south towards the Canary Islands and the west coast of Africa, reaching Cape Town on 26 August.[2] They then explored a major part of the Indian Ocean and the Antarctic Ocean, covering a total of 32,000 nautical miles.[4]

The Valdivia was among the Antarctic ice for almost four weeks in November and December 1898 in the sea between

pack ice.[5][3] As well as the biological, geological and geographic findings the expedition was also able to make significant meteorological observations.[3]

The Valdivia returned to Hamburg on 30 April 1899.[3]

Publication of results

The main aims of the expedition were to collect as many biological specimens as they could while focussing on how organisms adapted to the extreme conditions of the environment of the deep oceans. One result of this was that a number of anatomical studies of light organs were carried out. One of the best known publications is Volume 15: Die Tiefsee-Fische by Brauer which has an editorial review by Chun consisting of a systematic and anatomical study of the deep sea fish specimens they collected on their voyage aboard the Valvidia which were illustrated by Friedrich Wilhelm Winter. Winter's illustrations make it clear that these deep sea fish are heavily reliant on senses other than their vision. Many are bioluminescent and in numbers these animals have the effect of making the deep, dark sea look like a night sky filled with stars.[4]

The expeditions findings took 4 decades to be published, and they were published in 24 volumes as Wissenschaftliche Ergebnisse der Deutschen Tiefsee-Expedition auf dem Dampfer "Valdivia" 1898–1899 (Scientific results of the German deep-sea expedition on the steamer "Valdivia" 1898–1899). Another much admired volume is Chun's own Die Cephalopoden in which Chun describes the vampire squid Vampyroteuthis infernalis the scientific name meaning "the vampire squid from hell".[4] The type specimen was collected on the expedition.[6]

Gallery

Here is a sample of some of the plates from Wissenschaftliche Ergebnisse der Deutschen Tiefsee-Expedition auf dem Dampfer "Valdivia" 1898–1899:

  • Mastigoteuthis cordiformis
    Mastigoteuthis cordiformis
  • Vampyroteuthis infernalis
    Vampyroteuthis infernalis
  • Opisthoproctus soleatus
    Opisthoproctus soleatus
  • Various Stomiidae
    Various Stomiidae
  • The front cover of Chun's account of the expedition
    The front cover of Chun's account of the expedition

References

  1. JSTOR 1774523
    .
  2. ^
    doi:10.1080/00369220008733171
    .
  3. ^
    ISBN 1576074226
    .
  4. ^ a b c Jacqueline Ford (2012). "Book of the Week: The Vadivia Expedition Deep sea dredging in the twilight zone with Teuthologist Carl Chun". Notes and News from BHL Staff. Biodiversity Heritage Library. Retrieved 3 April 2017.
  5. ^ "Aus den Tiefen des Weltmeeres: Schilderungen von der Deutschen Tieffee-Expedition - From the Depths of the World Sea: Descriptions of the German Deep Sea Expedition)". NOAA. Retrieved 3 April 2017.
  6. ^ "Introducing Vampyroteuthis infernalis, the vampire squid from Hell". The Cephalopod Page. Dr. James B. Wood. Retrieved 3 April 2017.

See also

European and American voyages of scientific exploration

Retrieved from "https://en.wikipedia.org/w/index.php?title=Valdivia_Expedition&oldid=1219707739"