Newly designed hatchery egg cases i^ere used for the first time this 

 year. These cases. Insulated with foam plastic and constructed with 1/4 Inch 

 plywood, are lighter In weight and considerably more serviceable than older 

 type cases* 



(c) Nutrition 



Feeding studies were conducted at the Dorlon hatchery during the 

 current year In which experimental lots of fish were fed prescribed amounts 

 of food on the basis of average Size, total weight of the lot of fish and the 

 existing water temperature. The results of the studies were very favourable. 

 Illustrating that larger fish could be produced more economically when the 

 size and the weight of the fish are considered In developing the feeding 

 schedule. The method Is currently being considered for Introduction to all 

 of the trout rearing stations In the province, 



(d) Hybrid species 



The experimental culture of the splake or Wendlgo hybrid trout, 

 the progeny of a cross fertilization between a female lake trout and a male 

 speckled trout, was continued at three trout rearing stations. The hybrids 

 held at Dorlon hatchery were found to be mature and fertile In their third 

 year. The fish were spawned and the fertilized eggs were cultured for further 

 study. The adult stock was then planted In Cavern Lake, Dorlon Township, 



The hybrid trout stock held at the Chatsworth and Codrlngton statlcns 

 were planted as yearling fish for subsequent survival and growth studies. The 

 waters stocked were as follows, - 



Waters 

 Cavern lake 

 Jack Lake 



McCrae Lake 



Mace Lake 



Panache Lake 

 Pine Point Lake 



Red Rock Lake 

 Suuth Bay 

 Splake Lake 

 Sproule Lake 

 Unnamed Lake 



County 

 Thunder Bay 

 Nlplsslng 



Muskoka 



Algoma 



Sudbury 

 Sudbury 



Nlplsslng 

 Manltoulln 

 Nlplsslng 

 Nlplsslng 

 Sudbury 

 - 65 - 



Township 



Dorlon 



Sproule 



Baxter 



163 



Dieppe 



Ogllvle 



Bower 



Sproule 

 Macbeth 



