102 Salmon at the Antipodes. 



to catch and cover particles of food, or trie 

 shells and debris of hatched eggs. 



The hatching of salmon and trout ova re- 

 quires constant and extreme care and attention. 

 Cleanliness is most important in everything 

 connected with both the ova and the young 

 fish. Pure water is also of great importance, 

 as a very slight thing may destroy a whole 

 batch of eggs. In hatching English salmon, 

 the lower the temperature of the water during 

 the period of incubation the stronger the 

 young fish are likely to be, and 40 to 45 

 deg. is said to be most suitable. But in no 

 part of Australia are the streams long at these 

 temperatures, even that of the springs rising 

 at 2000 feet above the sea being about 51 deg. ; 

 and, unless the ova can bear much higher 

 temperatures than the authorities on the sub- 

 ject seem to think possible, there is little hope 

 of the English salmon succeeding in the Aus- 

 tralian climate. The brown trout or Salmo 

 fario, however, which in England is found in 

 the same streams with the salmon, bears the 

 temperature of our streams admirably, and the 

 ova hatch out successfully at a temperature 

 of 55 to 60 deg. without any great loss. 



