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Vol. 8, No. 12 
Page 6 
The sample sizes are small, but these preliminary resu 
amount of previous reproductive effort may be a factor dete 
breeding and 1ate-summer reproductive success. 
Its suggest that the 
rmining cessation of 
Table 6. Effect of previous reproductive effort on 
cot tontai1 rabbits. 
late-summer breeding of penned 
Rabbit 
Number 
T reatment 
Last-Known 
Pregnancy 
August 
Litter Size 
45 
No breeding prior to May 22nd 
August 
3 
7770 
One litter probable in April; no 
breeding until May 22nd 
more 
August 
4 
7755 
One litter probable in April; no 
breeding until May 22nd 
more 
August 
3 
7710 
Unrestricted breeding throughout 
summer 
May 
7718 
" it n 
1 1 
August 
2* 
Uterus contained two viable embryos and two resorptions. 
