MAINTAINING FISHES 

 FOR EXPERIMENTAL AND 

 INSTRUCTIONAL PURPOSES 



BY WILLIAM M. LEWIS 



Anyone interested in keeping fishes under aquarium con- 

 ditions, whether for scientific purposes or as a hobby, will find 

 Dr. Lewis' book an indispensable reference. He has brought 

 together the scattered information on the subject of maintain- 

 ing fishes in captivity and has added to this his own observa- 

 tions in keeping various fishes as experimental animals. This 

 work places special stress on the facilities for keeping fishes. 

 There is included a plan for a general purpose aquarium build- 

 ing and a discussion of the water supply filtering and aerat- 

 ing equipment. Of particular interest is the author's treat- 

 ment of the biological states of water and of the selection of 

 experimental fishes. His coverage of fish diseases and parasites 

 is up-to-date, and only those disease controls that are known 

 to be effective are recommended. Also included here is a con- 

 sideration of fright and the problem of fighting. 



To date the chemical variables of aquarium water have 

 been somewhat neglected. Dr. Lewis deals with the nature of 

 these variables and the techniques for measuring them. The 

 problems encountered in transporting fishes are considered, 

 and plans are presented for the construction of transport 

 facilities. Altogether, the work constitutes a concise treat- 

 ment of the unique problems involved in keeping fishes in 

 captivity. 



William M. Lewis, Professor of Zoology and Director of 

 the Fisheries Research Laboratory at Southern Illinois Uni- 

 versity, is a well-known authority on fish culture and the au- 

 thor of almost sixty scientific papers on the subject. 



SOUTHERN ILLINOIS UNIVERSITY PRESS 

 CARBONDALE, ILLINOIS 



