PLANTS IN PONDFISH CULTURE. 



19 



Table 7. — Food Content of Buffalofish (Ictiobus bubilus and I. cypeinella). 

 Advanced Fry and Fingeblings, in Pond 16B, Faikpokt, Iowa." 



Date. 



1917 



July 12 



July 24 



Aug. 24 



No. 



7 



20 



15 



Mm. 

 12 



19.9 

 29.6 



Animals. 



3.1 

 0.2 



15.2 

 25.8 



5 



7 

 6.8 



20.2 

 3.8 

 12.2 



1.3 





1.2 

 3.1 

 1.1 



Plants. 



0.6 

 3.1 

 6.4 



a Fry hatched in jars May 17 to 22, 1917, and transferred to pond May 25, 1917. 



5.5 



3 



3.2 



BIBLIOGRAPHY. 



BiRGE, E. A. 



1918. The water fleas {Cladocera) : In Fresh-water biology, by H. B. 



Ward and G. C Whipple, Oh. XXII, pp. 676-740. New York. 

 BiRGE, E. A., and JudzVy, C. 



1911. The inland lakes of W^isconsin : The dissolved gases of the water and 



their biological significance. Wisconsin Geological and Natural 



History Survey, Bulletin No. XXII, Scientific Series No. 7, xx 



and 257 pp. Madison. 

 Clemens, W. A. 



1917. An ecological study of the mayfly. Chirotenetes. University of 



Toronto Studies, Biological Series No. 17, 43 pp., 5 figs., 5 pis. 



Toronto. 



COKER, R 



1916. 



Forbes, S 

 1880. 



1883. 

 Forbes, S, 

 1908. 



JUDAY, C. 



1907. 



Moore, E, 

 1915. 



. E. 



The Fairport fisheries biological station : its equipment, organiza- 

 tion, and functions. Bulletin, U. S. Bureau of Fisheries, Vol. 

 XXXIV, for 1914, pp. 383-405. Washington. 



. A. 



On the food of young fishes. Bulletin, Illinois State Laboratory of 

 Natural History, Vol. I, No. 3, pp. CG-79. Peoria. 



The food of the smaller fresh-water fishes. Ibid., No. 6, pp. 65-94. 



, A., and Richardson, R. E. 



The fishes of Illinois. Natural History Survey of Illinois: State 

 Laboratory of Natural History, Vol. Ill, cxxxi and 357 pp. 



A study of Twin Lakes, Colorado, with especial consideration of the 

 food of the trouts. Bulletin, U. S. Bureau of Fisheries, Vol, 

 XXVI, for 1906, pp. 147-178. Washington. 



The potamogetons in relation to pond culture. Bulletin, U. S. Bureau 

 of Fisheries, Vol. XXXIII, for 1913, pp. 251-292. Washington. 



