CHAPTER III. 



EKEMIES OF OYA. 



Now, supposing tlie nest to be made, and 

 the ova deposited therein, how many of them 

 will ever come to life, or grow up to be fish 

 fit for human food ? As in the case of 

 Virgil's bees, we hear with sorrow, "Turn 

 varia illudunt pestes." What a catalogue of 

 these " pests of the water '' to the new^-born, 

 tender, and helpless little salmon, can we 

 enumerate ! Let us examine these in detail. 



First, accidents at the time of spawning. 

 Many of the eggs do not get properly im- 



