Mötet den 1 november 1902. 49 



regularity and importance of that migration. From the way, 

 in which the eel-traps must be placed, and from the time, when 

 the fishing takes place, Lundberg has concluded that the migra- 

 ting adult eel is wandering along the Swedish east-coast out of 

 the Baltic. He beUeves that the purpose of this migration is 

 spawning. Already Kroyer^) presumed, that the wandering 

 of the eel along the coast of Danmark has the purpose of find- 

 ing water of greater depth and salinity. 



In several papers^) C. G. Joh. Petersen has more fuUy 

 discussed the question and shown, that the yellow-eel is getting 

 the silver dress, when the time for its migration out from the 

 fresh and brakish water approaches, that only the silver-eel 

 goes out of fresh waters as well as along the shores of Den- 

 mark, and that the yellow-eel does not follow it on this migra- 

 tion. In his last mentioned paper Dr Petersen has shown 

 that the most part of the migratory eel caught along the coasts 

 of Denmark must be eels, that are coming from the fresh wa- 

 ters of Denmark and that only a smaller part can be considered 

 as coming from the Baltic. According to the information he has 

 got this sea must be comparatively poor in eel. Also Dr Pe- 

 tersen believes that the eel does not spawn in the Baltic, but 

 somewhere in salter water. 



') K r y e r : Danmarks Fiske. Vol. 3, p. 636. 



-) C. G. Joh. Petersen: Fiskenes biologiske Forhold i Holbsek Fjord 

 1890— (91). Beretning til Indenrigsministeriet fra Den danske 

 biologiske Station. I. Kjobenhavn 1891. 



— — The Common Eel {Anguilla vulgaris, Turton) gets a particular 



breeding-dress befor e its emigration to the sea. (From The 

 Danish Biological Station. V. 1894). Kjobenhavn 1896. 



— — Fortegnelse över Aalerusesteder i Danmark optaget i Aarene 



1899 og 1900. Med Bemaerkninger om Ruseaalens Vandringer 



etc. (Beretning til Landbrugsministeriet fra Danske biologiske 



Station. X. 1900 og 1901.) Kjobenhavn 1901. 



G. S. Bullo had already 1891 shown that the »silver-eels» are 



the »yellow-eels» in »wedding-dress» (Mitth. deutsich. Seefischerei-Verein. 



Bd. XL N:o 1, p. 212—214. 



4 



