FOOD FOR YOUNG SALMONOID FISHES. 85 1 



bering 5,926 in October, weighed 67 pounds 5 ounces, an average of 79.5 grains 

 (5 1 5. 1 centigrams). 



The 6 lots fed on herring alone, numbering originally in all 3,000 and at 

 the close 2,579, weighed on the average 75.3 grains (488 centigrams). 



The 5 lots fed on the herring and rye meal, 5,000 at the start and 4,425 at 

 the close, attained an average weight of 68.3 grains (442.6 centigrams). Though 

 these data indicate, as stated, the inferiority of fish and rye to plucks as promoters 

 of growth, a final conclusion in the matter should await more extended trial. 



Though in these experiments the only fish used was fresh herring, it is safe 

 to assume that other fresh fish would be equally potential in nourishing the 

 fish, and the cheapest kinds are no doubt for such purpose of equal value with 

 those of higher cost. The cheapest fish that can be obtained in fresh condition 

 is therefore probably the most desirable, provided it can be easily prepared for 

 use. Herring are especially easy to prepare, as they can be chopped into the 

 desired form without any dressing whatever. This fact and that of their 

 abundance and wide distribution render them perhaps the most available of 

 all species of fish. Their cost is also very moderate, those used at Craig Brook 

 costing I cent per pound. 



