14 University of Michigan 



may, however, be an insufficiency of food for young bass, so there 

 should be a better knowledge of their food in the stream prelimi- 

 nary to the planting of these fish as small as fingerlings. In 

 the writer's brief survey, it was found that large-mouthed 

 black bass about three inches long were eating water bugs, 

 Corixidae, and large amphipods, Hyallela knickerbockeri. The 

 latter were found to be very abundant in the river in June, 

 when they were breeding, and there can be no doubt but that these 

 crustaceans and the water bugs are an important fish food in the 

 stream. Welch (1912) notes that corixids are often eaten by 

 sunfish and minnows. A thorough study of the invertebrate life 

 of the river at the Warren Woods, including a quantitative study 

 of forms important as fish food, would probably give interesting 

 and valuable results. 



Literature 



Reighard, Jacob. "Methods of Studying the Habits of Fishes with an Account 



of the Breeding Habits of the Homed Dace." Bulletin of the Bureau of 



Fisheries, XXVIH (1910), 1111-35; 7 plates. 

 State Board of Fish Commissioners of Michigan. 



1905, Sixteenth Biennial Report, pp. 1-96. Lansing. 



1913, Twentieth Biennial Report, pp. 1-200. Lansing. 



1915, Twenty-first Biemtial Report, pp. 1-215. Lansing. 

 Welch, Paul, "Insect Life of Pond and Stream," Part II, Nature Study Review, 



VIII (1912), 181-93. 



