■were normal and gains were exceptional in this combination when fed during the 

 during the period of waian water. 



Contribution of a Salmon Waste Meal to Various Diets 



Supplementation with 10 percent of salmon waste meal during warm- 

 water per-iods increased the growth potential of the various diets tested in 

 previous feeding trials at this station. Information was desired, however, 

 to determine if a salmon waste meal would ^;ive more growth stimulus to some 

 diets than to others. 



From the results already mentioned in previous sectiona, vacuum- 

 dried salmon viscera meal did have a variable effect ranging from a 26 per- 

 cent increase to a 50 percent increase, If we consider 50 percent a normal 

 increase under the conditions of t; e eyperiment since most of the increments 

 were close to 50 percent, then the gain of the diet supplemented with crab meal. 

 Diet S; over the control without meal, %et U, may be crnsidered well below 

 normal. Also the 33 percent gain of bhe diet containing salmon eggs and sal- 

 mon milt. Diet 13 > may be considered below normal. 



High-Level Salmon Viscera Diets 



Thj.s series of feeding trials was designed to test a high level of 

 salmon viscera with either beef liver, hog liver, or a combination of beef liver 

 and hog liver. The effect of yeast was measiured also with a high-level salmon 

 viscera combination. In addition, this series evlauated salmon viscera at pro- 

 gressivelj' lower levels with a corresponding increase in the beef liver-hog 

 liver supplement. 



Included in these experiments were -^iet 1J4, T'd.th l5 percent beef liver 

 and 85 percent salmon visceraj Diet 15, with l5 percent beef liver, 83 per- 

 cent salmon viscera and 2 percent dried brewer's yeast (Olympic Brewers) j Diet 

 16, with l5 percent hog liver and 85 percent salmon viscera; Diet 17, with 7.5 

 percent beef liver^ 7-5 percent hnrg liver, and 85 percent salmon viscera; Diet 

 18, with 15 percent beef liver, l5 percent hog liver, and 70 oercent salmon 

 viscera; and Diet 8, with 33.3 percent beef liver, and 33-3 percent hog liver, 

 and 33- U percent salmon viscera. Meal was not added to any of these diets. 



The results of the experiment showed that beef liver alone with sal- 

 mon viscera produced a significantly greater mean lot weight at the end of 

 2U weeks th'an did a comb: nation of beef liver, hog liver and salmon viscera 

 (Table 1, -^iets lU and 17). The comparison of the beef liver supplement and 

 the hog liver supplement shoired no significant differences in mean lot weights 

 (Table 1, Diets lli and I6) , The mortalities were significant throughout. 



Yeast proved bo be of no value w?ien added to the diet of beef liver 

 and salmon viscera. The final mean lot weight of the fish being fed the diet 

 containing yeast was significantly lower than the weight of the fish being 

 fed almost the same diet >Tithout yeast (Table 1, ^iets ik and l5) « There 

 were no differences in mortalities. 



