LITERATURE CITED 
Hubbs, Carl L. 
1920. Notes on hybrid sunfishes. Aquatic Life 5(9):101-3. 
1955. Hybridization between fish species in nature. System. Zool. 4(1):1-20. 
Hubbs, Carl L., and Laura C. Hubbs 
1931. Increased growth in hybrid sunfishes. Mich. Acad. Sci., Arts, and Letters Papers 13:291-301. 
1932. Experimental verification of natural hybridization between distinct genera of sunfishes. Mich. Acad. Sci., Arts, 
and Letters Papers 15:427-37. 
1933. The increased growth, predominant maleness, and apparent infertility of hybrid sunfishes. Mich. Acad. Sci., 
Arts, and Letters Papers 17:613-41. 
Krumholz, Louis A. 
1950. Se on the use of hybrid sunfish in stocking small ponds. Am. Fish. Soc. Trans. for 1949, 
7112-24. 
Lagler, Karl F., and Charles Steinmetz, Jr. 
1957. Characteristics and fertility of experimentally produced sunfish hybrids, Lepomis gibbosus and L. macrochirus. 
Copeia 1957(4):290-2. 
Luce, Wilbur M. 
1937. Hybrid crosses in sunfishes. Ill. Acad. Sci. Trans. 30(2):309-10. 
Moenkhaus, W. J. 
1911. Cross fertilization among fishes. Ind. Acad. Sci. Proc. for 1910:353-93. 
Ricker, William 
1948. Hybrid sunfish for stocking small ponds. Am. Fish. Soc. Trans. for 1945, 75:84-96. 
Thompson, David H. 
1935. Hybridization and racial differentiation among Illinois fishes. Ill. Nat. Hist. Surv. Bul. 20(5):492-4. 
(Appendix to Annotated list of the fishes of Illinois, by D. John O’Donnell.) 
