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

G. ANEV
Agricultural Institute, BG-9700 Shumen, Bulgaria

Abstract

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.

Key words: ejaculate, semen, spermatozoa, blood grade, genealogical lines, behaviour