BIOLOGICAL RELATIONS OF AQUATIC FORMS 203 



2. Of what value is artificial propagation ? 



3. Is such fertilization external or internal ? Note. Female fishes 

 are in the habit of laying their eggs on the bottom in various localities, 

 and the male afterwards sprays them with milt. 



4. Write an account of the process of artificial fertilization in fishes. 



Questions 



1. What is meant by the term " fertilization " ? 



2. What fishes are commonly artificially propagated ? Why ? 



Special Reports 



1. Fish culture. 



2. The transportation of fish and fish eggs. 



3. Spawning season. 



4. The salmons. 



5. The trouts. 



6. The United States Bureau of Fisheries. 



References 



Hunter, Essentials of Biology. Chap. XXII. 



Lydell, " Habits and Culture of the Black Bass." Bulletin U. S. Fish 

 Commission for 1902. 



Brice and others, "A Manual of Fish Culture." Department U. S. 

 Fish Commission for 1897, Part 23, p. 340, many illustrations. Notes 

 on frogs, oysters, etc. 



Kellogg, Elementary Zoology, pp. 297-298. 



Ellis, " Transportation of Fish and Fish Eggs " Report U. S. Fish 

 Commission, Part 23, 1897. Illustrated. 



Wallich, C., "A Method of recording Egg Development for Use of 

 Fish Culturists." Report U. S. Fish Commission, 1900. 



Pratt, D. L., "Farming the Seas.' 1 Outing Magazine, September, 

 1908. 



Smith, II. M., The United States Bureau of Fisheries. Published by 

 International Fisheries Congress, Washington, D. C., 1908. (Write U. S. 

 Bureau of Fisheries.) 



Mead, A. D., " A New Principle of Agriculture and Transportation of 

 Live Fishes." Bureau of Fisheries, Document 676, 1910. 



