FOREWORD 



At the second annual meeting of the Tri-State Fisheries Con- 

 ference (Michigan, Minnesota, and Wisconsin) in 1946, a spe- 

 cial committee was appointed to assemble information on bait 

 culture and to assign research to the contributing agencies. In 

 1948, the results of that cooperative project were published in 

 Circular 12, Propagation of Minnoios and Other Bait Species. 

 The present publication is a revision of Circular 12 and adds 

 the results of 5 years of pond investigations by research men in 

 the Midwestern States. 



The following persons contributed to this revision : 

 Dr. John Dobie, Minnesota Fisheries Research Unit, revised 

 the sections on production of fish in natural ponds, handling of 

 minnows, and control of predators. Measurements, weights 

 and volumes of minnows, and food habits of some minnows 

 were added to the section on the life histories of important bait 

 fishes. Dr. O. Lloyd Meehean, United States Fish and Wildlife 

 Service, rewrote the sections on pond construction and control 

 of aquatic vegetation. Dr. S. F. Snieszko, United States Fish 

 and Wildlife Service, rewrote the section on control of 

 diseases and parasites and added information on use of the new 

 antibiotics. George N. Washburn, Ozark Fisheries, wrote the 

 sections on methods of fathead-minnow, creek-chub, and golden- 

 shiner propagation used by the large commercial hatcheries of 

 Missouri. John Moyle, Iljalmar Swenson, and Fred Miller, 

 Minnesota Bureau of Fisheries, reviewed the manuscript. 

 Harold Condiff and L. N. Nelson generously provided ponds 

 and field assistance for the Minnesota natural-pond studies. 

 Ruth Aanes, Minnesota Fisheries Research Unit, typed and 

 proofread the manuscript. 



