590 HOW DOES MAN CONSERVE HIS RESOURCES? 



U. S. Bureau of Fisheries 

 Taking spawn from fish. The fertilized eggs are placed in tanks supplied with running water. 



The sturgeon, the eggs of which are used in the manufacture of 

 the delicacy known as caviar, is an example of a fish that is almost 

 extinct in most parts of the world because it was taken at the 

 breeding season. Other food fish taken at such a time are also 

 in danger. Fortunately, the government, through the Bureau 

 of Fisheries, and various states, by wise protective laws 

 and by artificial propagation of fishes, are beginning to turn 

 the tide. Certain days of the week the salmon are allowed to 

 pass up the Columbia River unmolested. Obstructions must 

 be removed which might prevent fish from passing up or down 

 rivers. Closed breeding seasons protect our trout, bass, and 

 other game fish ; also the catching of fish under a certain size is 

 prohibited. 



Each fisherman should pledge himself, first, to fight against the 

 pollution of streams with factory wastes and sewage ; second, to be 

 a real sportsman and obey all laws with reference to limit and size 

 of the catch ; third, never catch fish during their breeding season ; 

 and fourth, to moisten the hands before handling undersized fish 



