HYBRIDS. 



Ixxiii 



On November 29, 1883, 3,695 eggs of the American char were milted 

 from a par. The following is the monthly record of the number of dead 

 eggs which were removed. In December 144, in January 1,527, and in 

 February 401, or a total of 3,372 dead eggs. On March 12, 1884, 7 were 

 alive, but in an unsatisfactory condition.. The amount of fertili-zation 

 received by American char eggs' from young pars is evidently less than that 

 afforded to ova of the Lochleven trout, the rela.tionship being perhaps more 

 distant between a char and a salmon than between a salmon ^nd a trout. 



On November 15, 1882, 2,000 Ova from a Lochleven trout were milted' 

 from an American char {Salmo fontinalis), and on November 29, 1883, 

 about 250 were living. On March 13, 1884, 211 were alive. 'When first 

 hatched these hybrids were much malformed, monstrosities being numerous, 

 while blindness in one or both eyes and bull-dog. deformities of the snout 

 . were common. ■ Some semi-albinos, were nearly blind. In August, 1884, all 

 were doing well, and a male having been examined was found to be full 

 of milt. 



This experiment was repeated' on November 29, 1883, when 3,000 ova 

 were taken from a Lochleven trout and milted from an American char. 

 The deaths were in about the proportion of 1 in 17 eggs. The youijg' 

 were looking 'healthy in August, 1884. 



On November 15, 1882, 8,000 ova of an American char were fertilized 

 from a Lochleven trout, and on November 29, 1883, only 16 were alive,, 

 and on March 12, 1884, 8. Their state was unsatisfactory, the largest 

 being a little over two inches in length. In this experiment when first 

 hatched the young fry were greatly deformed j many had crooked spines, 

 atrophy of the posterior portion of their bodies, with a general deficiency of 

 fins; especially of the caudal. In August, 1884, the last 7 were doing well. 



November 15, 1882, about 9,000 eggs of an American char were milted 

 from a Scotch variety of char, and no monstrosities (as seen in the other" 

 two crosses) resulted, and 91 lively young fry were present at Howietoun 

 on March 13, 1864, while in August, on one being' examined, it was found 

 to be a. male nearly ready for breeding. On November 12, 1883, the 

 experiment was repeated, and the eggs hatched on- January 26, 1884. 

 On March 13, 1884, there were at least- 500 'young alevins alive and doing 

 well. On. December 1, 1883, a third experiment -was carried out. These 

 hatched February 22, 1884, and upwards of 100 young were present on 

 March 13, 1884. 



Different species of Salmonidce may be crossed, as the Lochleven trout 

 and char, or various forms of char, and the young would seem to be fertile. 

 If crosses between salmon and troflt are sterile, and no longer migratory in 

 their instincts, the question arises; will they be in season all the year round ? 

 Could the fish ciilturist raise a non-migratory sterile form, what aa addition. 



