Tke Okio Journal of Science 



Vol. XXI FEBRUARY, 1921 No. 4 



ALGAL FOOD OF THE YOUNG GIZZARD SHAD.* 



Lewis Hanford Tiffany, 

 Ohio State University. 



Introduction. 



During a surveyf of the distribution and feeding habits of 

 the Ohio fishes for the State Bureau of Fisheries, opportunity 

 was afforded for the study of the algal food of the gizzard 

 shad, Dorosoma cepedianum Le Sueur, collected at various 

 places over the state. This paper is the result of an examination 

 of some two hundred fishes from Buckeye, Indian, Loramie, St. 

 Mary's and Chippewa Lakes, and the New Reservoir at Akron. 

 While the major part of the discussion is devoted to the algal 

 food of the gizzard shad, attention is called to the animal forms 

 and other material found in the digestive tract, and to the 

 economic importance of algse as a part of the aquatic flora. 



The writer desires to express his gratitude to those who so 

 materially aided in the preparation of this paper: to Mr. A. C. 

 Baxter, Chief of the State Bureau of Fisheries, for kindly 

 permitting the use of the gizzard shad, collected during the 

 survey, for a botanical study; to Professor R. C. Osburn, for 

 suggesting examination of the stomachic and intestinal content 

 of the fish; and especially to Professor E. N. Transeau, who 

 first introduced me to the study of algee in the summer of 1912, 

 for the loan of algological literature and for helpful criticisms 

 on species determination and identification. 



♦Papers from the Department of Botany, Ohio State University, No. 123. 



fThis survey covered a period of three months (June 15 to Sept. 15, 1920) 

 and was under the direction of Professor R. C. Osburn, Ohio State University, 

 assisted by Professor C. L. Turner, Beloit College, Mr. E. L. WickUff, Mr. W. C. 

 Kraatz, and the writer, Ohio State University. 



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