Trout and Salmon 199 



fine enough to keep eneniies away from their eggs and 

 coarse enough to let water in, and a current swift and cool and 

 well-aerated enough to let their eggs breathe, they are 

 satisfied and they spawn. If the trout can go through this 

 cycle of behavior without any of the influences set forth 

 in the foregoing hypotheses, it seems reasonable to believe 

 that the salmon can do the samej and if that is so, then the 

 theories fail to explain. 



