03-05-2003, 04:32 PM 
		
	
	
		The Splake raised in Utah hatcheries are supposed to be sterile. It is done using temperature changes during the fishes early life. I don't know all of the details. Just like the "sterile" Rainbows planted in Strawberry, a small percentage of fish are capable of spawning. It is not an exact science, just very close. I've heard estimates of 97-98%.
[signature]
	
	
	
	
[signature]
 
 

 
