802 



BULLETIN OF THE BUREAU OF FISHERIES. 



The spawners and the spawning pond. — When the pond is in order, the 

 spawners are put in and may now be left to themselves. The proportion 

 between male and female is something like i to 4. The fish must be fed 

 regularly, say three or four times a week. Herring are chiefly used, but other 

 fish containing much oily matter, as saithe, whiting, or haddock, are pref- 

 erable. The pond at Flodevig will hold about 350 cubic meters of water, 



Vy>^^.> 



li l t t -i— 



to s o 



20 ^Wt-jf 



Fig. I. — Plan of Flodevig hatching station. 



sufficient for about 2,000 spawners of medium size. The water supply must 

 be regular and proportionate to the number of fish — at Flodevig 30,000 to 

 50,000 liters per hour. 



In feeding the fish a certain quantity of food and offal will sink to the 

 bottom, and together with unimpregnated eggs, excrement from the fish, 



