1332

  

388

O Ay
20w Jvpvvpsod A)2vd

$ 382

feginning of Maich end of Mazch
Date of mating

Fig.1 Embryonic mortality as a Fig.2
factor of regulating the

optimal fertility in mink females

with different dates of mating in

the breeding season.

  

1234 567 8910 23 628910umi2

 

 

1-2 34 56 1-89-10 1/-12 13-15
littez size

 

   

bitter size Cittez size

Early postnatal mortality in different size litters
of females of following genotypes: 1 - ppAA, ppaa;

2 - standard; 3 - PpAA, PpAa; 4 - ppaa; 5 - ppAA;

6 - ppAa; 7 - hh; 8 - Hh ( a,b - data for fur farm
"Puschkinskij",- ter Belyaev,Evsikov,1962; ¢ - da-
ta for fur farm "Lesnoj" ).