Agricultural Institute, BG-9700 Shumen, Bulgaria
ANEV, G., 2003. Influence of some genetic and non-genetic factors on reproductive traits of rams from the North-East Bulgarian Fine Fleece Breed – Shumen type. II. Sperm motility at collecting, thermal resistance and cold resistance coefficient of fresh semen. Bulg. J. Agric. Sci., 9: 693–698
The study comprised 294 ejaculates from 34 rams from the North-East Bulgarian Fine Fleece Breed – Shumen type. The following traits were investigated – sperm motility after collecting, thermal resistance and coefficient of cold resistance of fresh semen depending on the factors – lineal belonging, blood grade from different breeds, ethological type, age and herd. It was established that the factors studied had significant influence on the traits except for the ethological type.