American Fisheries Society 419 



below the lake of the same name, he caught brook trout 

 some 30 or more centimeters long, and one landlocked 

 salmon 50 centimeters in length. He said further that he 

 had seen a considerable number of brook trout at various 

 places in the river. Some time later when fishing with an 

 artificial minnow he hooked a very large fish which finally 

 broke his line and disappeared with a portion of it, hook, 

 minnow, and all. However, before the fish succeeded in 

 breaking the line it had been hauled in close enough for him 

 to get a fairly good view of it, and he believed it to have 

 been a lake trout, knowing it was neither a "trucha criolla" 

 nor a brook trout, and being almost positive that it was not 

 a landlocked salmon. He did not state and I have not yet 

 learned whether the fish which broke the line was hooked 

 in the Rio Traful or in Lake Traful. Judging, however, 

 from the fact that he was using an artificial minnow instead 

 of an artificial fly, I am led to believe he was fishing in Lago 

 Traful, and if so, I feel quite positive that the fish hooked 

 was a lake trout. The only landlocked salmon, brook and 

 lake trout planted in Lago Traful and waters in that 

 vicinity, previous to last year, were put there by myself in 

 May, 1904, hence the fish caught were results of this plant 

 from the first lot of Salmonid^e ever brought to Argentina. 

 The fact that this large landlocked salmon was caught and 

 identified by the "ayudante" in charge of the Nahuel Huapi 

 hatchery leads me to feel sure that the introduced fishes 

 taken at various times from the Rio Negro between Chilforo 

 and its mouth by net fishermen were landlocked salmon. If 

 so, this will Hkely prove an easy means of populatmg 

 suitable waters of Argentina with Atlantic salmon, which I 

 have always thought feasible. It was partly with this idea 

 that I had landlocked salmon brought to the country with 

 every lot of eggs imported (excepting upon two occasions 

 when they could not be obtained because of the season of 



the year). 



Information relative to the introduced fishes mentioned 

 above as having been taken from the Rio Negro between 



