132 Modern FishcuUure in Fresh and Salt Water. 



in market, are used with good effect and are one of the 

 natural foods of trout. 



HASLETS. 



"Sheep's haslets" are used east of New York — and 

 that is a New England name for what New Yorkers 

 call "plucks," meaning the heart, liver and lungs all at- 

 tached to the windpipe as it is removed from the animal. 



NATURAL FOODS. 



If the fish are to forage for the whole or part of their 

 food the pond should be stocked with such water plants 

 as grow in spring water and then the crustaceans, gam- 

 marus and asellus should be introduced. But beware of 



Gammarus (magnified three times). 



the burrowing crawfish, for it not only enters into com- 

 petition with the trout for its crustaceans and insect lar- 

 vae, but makes holes in dams. Besides this, it cannot be 

 eaten by small trout when it is in the adult state, and 

 when soft it hides. The gammarus is usually called 



