242 KISH llAICHKRY MANAGEMENT 



Table 26. recommended amounts of oregon moist pellet feed for sal- 

 weight PER DAY (pounds FEED PER 100 POUNDS OF FISH), RELATED TO FISH SIZE 



unpublished.) 



excellent conversions and weight gains by the fish. Taking advantage of 

 such situations increases the efficiency and production of a hatchery. By 

 the same reasoning, as the temperature starts to fall, metabolism is 

 depressed and less food than the amounts listed in the tables still will 

 result in maximum efficiency of food conversion. 



As mentioned in Chapter 2, salmonids increase their length at a constant 

 rate during their first 1^ years or so of life, so long as they are raised at a 

 constant temperature (see page 6l). The rate of length increase (inches per 

 day or month), of course, varies with temperature. For a given temperature, 

 the amount of daily feed needed can be calculated from knowledge of fish 

 growth and conversion at that temperature from the following formula: 



, , , ., Conversion x 3 x A Z, x IQQ 

 rercent body weight to feed daily = 



