>| infobox caption= | display title=
}}{{Infobox ship image | Ship image=Research vessel Thor.jpg | Ship image size= | Ship caption=The Danish Research trawler Thor (1903-1927)
}}{{Infobox ship career | Hide header= | Ship country=Denmark | Denmark}} | Ship name=Thor | Ship owner=Islands Handel & Fiskeri A/S | Ship operator= | Ship registry=Copenhagen | Ship route= | Ship ordered= | Ship builder=Edwards Bros., North Shields, England | Ship original cost= | Ship yard number=606 | Ship way number= | Ship laid down= | Ship launched =1898-11-26 | Ship completed=1899 | Ship christened= | Ship acquired= | Ship maiden voyage= | Ship in service= | Ship out of service=1902 | Ship identification= | Ship fate= | Ship status= | Ship notes=
}}{{Infobox ship career | Hide header=title | Ship country=Denmark | Denmark}} | Ship name=Thor | Ship owner=Danish Steam Trawling | Ship operator=Adolph Carl | Ship registry=Copenhagen | Ship route= | Ship ordered= | Ship builder= | Ship original cost= | Ship yard number= | Ship way number= | Ship laid down= | Ship launched = | Ship completed= | Ship christened= | Ship acquired= | Ship maiden voyage= | Ship in service=1902 | Ship out of service=1903 | Ship identification= | Ship fate= | Ship status= | Ship notes=
}}{{Infobox ship career | Hide header=title | Ship country=Denmark | DK|naval}} | Ship name=Thor | Ship owner=Danish Ministry for Agriculture and Fishing | Ship operator= | Ship registry=Copenhagen | Ship route= | Ship ordered= | Ship builder= | Ship original cost= | Ship yard number= | Ship way number= | Ship laid down= | Ship launched= | Ship completed= | Ship christened= | Ship acquired= | Ship maiden voyage= | Ship in service=1903 | Ship out of service=1927 | Ship identification=Call sign: NLBT[1] | Ship fate= | Ship status= | Ship notes=
}}{{Infobox ship career | Hide header=title | Ship country=Iceland | Iceland}} | Ship name=Thor | Ship owner=Bjergningsselskabet Vestmannaø, Iceland | Ship operator= | Ship registry=Vestmannaeyjar | Ship route= | Ship ordered= | Ship builder= | Ship original cost= | Ship yard number= | Ship way number= | Ship laid down= | Ship launched= | Ship completed= | Ship christened= | Ship acquired= | Ship maiden voyage= | Ship in service=1927 | Ship out of service=1930 | Ship identification= | Ship fate=wrecked[2] | Ship status= | Ship notes=
}}{{Infobox ship characteristics | Hide header= | Header caption= | Ship class= | Ship type=Steam trawler | Ship tonnage=190 BT / 71 NT | Ship displacement= | Ship length=115.3 feet | Ship beam=21.3 feet | Ship height= | Ship draught= 11.0 feet | Ship draft= | Ship depth= | Ship decks=1 | Ship deck clearance= | Ship ramps= | Ship ice class= | Ship sail plan= | Ship power= | Ship propulsion=325 hp triple expansion steam engine, G.T. Grey, South Shields, 1 x screw | Ship speed= | Ship capacity= | Ship crew= | Ship notes=Rigged as trawler
}} |
Thor was a Danish research vessel from 1903 to 1927. It was built in Newcastle in 1899 as a steam trawler. Thor conducted hydrographical and oceanographical research in the North Atlantic and the Mediterranean and helped locate the spawning grounds of the Icelandic cod.[3] Most importantly, Thor conducted two expeditions to the Mediterranean Sea in 1908-1910 with Johannes Schmidt as cruise leader. The aim of the expeditions, funded by the Carlsberg Foundation, was to locate the spawning grounds of the European eel. Contrary to their expectations the expeditions found that fewer eel larvae (leptocephals) were found the deeper they went into the Mediterranean, but they also grew larger. The logical conclusion was that the spawning grounds were not in the Mediterranean, but in the Atlantic Ocean.
In a broader perspective the largest result from the two expeditions was the very large contribution to the general understanding of the oceanography and pelagic fauna of the Mediterranean.[3]
{{Gallery1. ^{{cite web |title=www.jmarcussen.dk |url=http://www.jmarcussen.dk/maritim/skibsliste/side.php?id=10417 |accessdate=25 January 2019}}
2. ^{{cite web |title=Tynebuildships.co.uk |url=http://www.tynebuiltships.co.uk/T-Ships/thor1899.html |accessdate=25 January 2019}}
3. ^1 {{cite book |last1=Wolff |first1=Torben |title=200 years of Danish Marine Exploration |date=1967 |publisher=Rhodos |location=Copenhagen}}