THE STUDY OF FLUCTUATING ASYMMETRY IN SOME POPULATIONS BELONGING TO MUS SPICILEGUS PETENYI, 1882 SPECIES FROM NORTH OF MOLDAVIA

Introduction Random deviation from the perfect symmetry of normally symmetrical characters for an individual with a given genotype occurs during individual development due to the influence of multiple environmental factors. Fluctuating asymmetry is often used as a measure of developmental instability and can be estimated as the variance of the distribution of differences between the left and right sides. (Taras K. Oleksyk, 2004). We are pursuing in the present paper the fluctuant asymmetry is individuals of Mus spicilegus; this is also a comparative study which tries to follow in stress factor is a determinant factor for the deviation from the perfect bilateral symmetry.