FISH CULTURE 



II51 



digestion of the natural food are : {a) the large surface presented by the lar- 

 vae as a whole, which enables the gastric juice to attack the food thoroughly ; 

 (6) the loose consistency of the food in the stomach of the fish ; (r) the 

 gastric juices of the larvae etc. , which contribute to digestion in the stomach 

 of the fish. 



It follows from the above that the natural food is the best for the fry of 

 Salmonids. To the youngest hy, spleen can also be given when the natural 

 food is wanting. When the fry reach a certain age a ration maj^ be given them 

 consisting of spleen plus fish-flesh, or spleen plus shrimps, or again fish-flesh 

 alone. The mixture fish -flesh plus shrimps also gave satisfaction with, 

 somewhat older fry. 



893 - Fish Breeding in Switzerland in 1915. — Bulletin suisse de Fechc et Pisciculture 

 XVIIth year, No. 5, pp. 39-63. Xeuchatel, May 1916. 



As during the preceding year (i), 212 establishments were carried on 

 during the incubation period 1914-1915. 128857000 fry hatched out from 

 156 696 000 incubated eggs. Including 63 239 small fish of one summer or 

 one year, 127 694 239 fry were put into public waters under federal super- 

 vision. The appended Table gives particulars of the fry resulting from the 

 incubated eggs. 



Number of latvae hatched ont. 



A. — Native species. 



Salmon 



Salmon trout, hybrid 



I,ake trout 



River and stream trout 



Char 



Grayling 



Coregonus 



rike 



Perch 



Carp 



B. — • Exotic species. 



Rainbow trout 



American char 



Total .... 



337 000 

 34000 

 655 000 

 1 68 000 

 456 000 

 632 000 

 244 000 

 706 000 

 130 000 

 205 000 



284 000 

 6 000 



128 857 000 



The Confederation paid to the cantons, for transmission to the fish breed- 

 ers in question, a subsidy of nearly £ 1400 (nearly £ 1500 in 1914) for the 



(i) vSee B. 1914, No. 1038. 



[Ed.) 



