THE SALMON, THE TROUT, AND THE SHAD. 759 



Of the valuable fishes which, coming from the sea, ascend the Rhine and 

 its tributaries, (Trutta salar, Trutta trutta, and Alausa vulgaris.) the two 

 first-mentioned species do not eat anything, and the third only crusta- 

 ceans and insects. The young salmon living in the Ehine seem to show 

 a preference for the " Eiimpchen" as an article of food ; but they only 

 spend that part of their life in fresh water when they are too small to 

 hunt for " Eiiinpchen." The food of Trutta fario consists chiefly of 

 insects and their larvas, and only to a small extent of small fish which 

 must be classed with the " Eiimpchen." By the catching of the " Eiimp- 

 chen," only a small portion therefore of the young salmon and the trout 

 are to a limited extent deprived of food. Since, therefore, as Troschel 

 has shown, no valuable young fish are destroyed by the fishing of 

 " Eiimpchen," since thereby the more valuable large fish are not deprived 

 of any absolutely necessary food, and since, finally, the "Eiimpchen" 

 form a good and well-flavored article of food, thus amply making up for 

 the damage which their being fished may do to the great fisheries, I 

 must declare the fishing of " BUmpcken " to ~be entirely harmless. 



