196 Thirty-fifth Annual Meeting 
trout in 1904 were planted en route to the hatchery. This was 
due to the fact that they were in bad condition and it is very 
doubtful if any of them produced results in the waters where 
planted. In 1905 only 48 per cent. of the eggs hatched, and in 
1906 only 10 per cent. The cause of this low percentage is not 
postively known but in all probability it was due to the fact that 
the eggs were taken from fish which were reared in spring water 
and the eggs were eyed in water of a temperature of about 53 
degrees. They were then subjected to a temperature of 34 to 35 
degrees for a long period 

a necessary proceeding where they are 
to be carried in transportation cases on a trip from forty to fifty 
days in duration. Whether rainbow trout eggs taken from wild 
fish can be eyed successfully in an extremely low temperature 
and then transported with good results is yet to be determined 
by actual trial. Certainly it is known that rainbow trout eggs 
are more sensitive to temperature changes than any of the other 
species of Salmonidae artificially propagated. 
The eggs of the steelhead trout which proved a failure in 
1904 were undoubtedly too far advanced for shipment. The loss 
of the chinook salmon eggs in 1905 is not accounted for. They 
were packed by an expert who has successfully carried eggs of 
this species to New Zealand with very small losses, and the ques- 
tion of temperature orsthe stage at which packed are not factors 
to be considered unless the temperature of the eggs became too 
low while they were being held in cold storage in England or in 
Buenos Aires, in each of which places they were so held for sever- 
al days. Eggs of other species shrpped at the same time were 
held in a similar manner, however. 
In addition to the eggs secured from the United States 
25,000 Atlantic salmon eggs and 5,000 brown trout eggs were 
4 
obtained in England during the past year. Hatcheries have been 
established at Nahuel Huapi, Santa Cruz, Alta Gracia, Buenos 
Aires and Chascomus. Eggs have already been taken from the 
brood stock of trout reared from the first lot of brook trout eggs 
sent to the country in the winter of 1903-04 and hatched and 
reared at Nahuel Huapi. 
In addition to the acchmatization of foreign species of fish 
one native fish is propagated, namely, the pejerrey. There are 
two species of pejerrey in Argentina, Basilichthys bonariesis and 
aA. 
; wuemre Ae 
