416 Fortieth Annual Meeting 



From September 30, 1904, to October 31, 1908, about 

 500,000 pejerrey eggs were collected, mostly at Lake Chas- 

 comus, and from these 343,050 developed eggs and young 

 fish have been distributed. Owing to the prohibition of 

 fishing in Lake Chascomus since early in 1906, it has been 

 impossible to extend the pejerrey operations, and the time 

 and money that under favorable circumstances might have 

 been profitably employed in this branch of the work, have 

 been devoted to operations which would bring a more certain 

 return. In addition to the trouble of securing an adequate 

 supply of eggs to compensate for the expenditure of time 

 and money, obstacles were encountered from the fact that 

 the pejerrey is probably the most difficult fish to propagate 

 artificially. Some fishes cannot be artificially propagated by 

 any of the methods known to modern fish culture, and the 

 pejerrey is closely similar to these species in this respect. 



From the 4,260,400 fish eggs imported into this country 

 there have been hatched 3,545,870 fish; thus the loss on the 

 entire lot of eggs from the time they were packed at the 

 different hatcheries in the United States, England, and Ger- 

 many until they had finished hatching at the different hatch- 

 eries in Argentina has been but 714,530 eggs, or consider- 

 ably less than 17 per cent. ]\Iany of the eggs were brought 

 from the most distant points in the United States, often 

 from the Pacific Coast, and were in the packing cases from 

 50 to 80 days. 



The brook trout planted from the La Cumbre hatchery 

 in 1907 in the headwaters of the Rio San Miguel and 

 tributaries, Rio Carappe and tributaries and in the head 

 waters of the Rio Cosquin and tributaries, all in the Province 

 of Cordoba, have given splendid results, many trout from 

 30 to 35 centimeters long having been seen in these waters 

 by myself and many other people when the fish were but 

 one year old. One small lot of 200, only 5 to 8 centimetres 

 long, planted in the Lumsdaine Dique at Cruz Chica near 

 La Cumbre, resulted in 180 fish from 25 to 30 centimeters 

 long when they were but one year old, although they had 



