Johann Marcusen (29 June 1817–10 July 1894) was a

Baltic German Baltic Germans ( or , later ) are Germans, ethnic German inhabitants of the eastern shores of the Baltic Sea, in what today are Estonia and Latvia. Since Flight and expulsion of Germans (1944–1950), their resettlement in 1945 after the end ...

ichthyologist Ichthyology is the branch of zoology devoted to the study of fish, including bony fish (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha). According to FishBase, 35,800 species of fish had been described as of March 2 ...

Life and work

Johann Marcusen was born in

Jelgava Jelgava () is a state city in central Latvia. It is located about southwest of Riga. It is the largest town in the Semigallia region of Latvia. Jelgava was the capital of the united Duchy of Courland and Semigallia (1578–1795) and was the ad ...

in present-day

Latvia Latvia, officially the Republic of Latvia, is a country in the Baltic region of Northern Europe. It is one of the three Baltic states, along with Estonia to the north and Lithuania to the south. It borders Russia to the east and Belarus to t ...

. He studied in

Saint Petersburg Saint Petersburg, formerly known as Petrograd and later Leningrad, is the List of cities and towns in Russia by population, second-largest city in Russia after Moscow. It is situated on the Neva, River Neva, at the head of the Gulf of Finland ...

and

Tartu Tartu is the second largest city in Estonia after Tallinn. Tartu has a population of 97,759 (as of 2024). It is southeast of Tallinn and 245 kilometres (152 miles) northeast of Riga, Latvia. Tartu lies on the Emajõgi river, which connects the ...

. Between 1851 and 1854 he conducted scientific journeys to the

Mediterranean Sea The Mediterranean Sea ( ) is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean basin and almost completely enclosed by land: on the east by the Levant in West Asia, on the north by Anatolia in West Asia and Southern Eur ...

Syria Syria, officially the Syrian Arab Republic, is a country in West Asia located in the Eastern Mediterranean and the Levant. It borders the Mediterranean Sea to the west, Turkey to Syria–Turkey border, the north, Iraq to Iraq–Syria border, t ...

and

Egypt Egypt ( , ), officially the Arab Republic of Egypt, is a country spanning the Northeast Africa, northeast corner of Africa and Western Asia, southwest corner of Asia via the Sinai Peninsula. It is bordered by the Mediterranean Sea to northe ...

. In 1854 he was made a professor, and worked as a professor of zoology in

Odessa ODESSA is an American codename (from the German language, German: ''Organisation der ehemaligen SS-Angehörigen'', meaning: Organization of Former SS Members) coined in 1946 to cover Ratlines (World War II aftermath), Nazi underground escape-pl ...

from 1858. After his retirement in 1873 he moved to

Switzerland Switzerland, officially the Swiss Confederation, is a landlocked country located in west-central Europe. It is bordered by Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east. Switzerland ...

, where he spent the rest of his life. The elephantfish genus ''

Marcusenius ''Marcusenius'' is a genus of the elephantfish group native to Africa. Its members are highly diverse in size, with the smallest species reaching less than and the largest more than . The genus is named after Johann Marcusen. Species Ther ...

'' is named after him.

References

{{DEFAULTSORT:Marcusen, Johann 1817 births 1894 deaths Baltic-German people from the Russian Empire Naturalists from the Russian Empire Immigrants to Switzerland