Abstract: Simmental bread belongs to two directional milk and meat usage cattle, because of its good musculature and beneficial size. The aim of the research was to determine the level of hematological parameters (RBC,WBC, Hb, Hct, PTL,MCH,MCHC,MCV), biochemical ones (urea, creatinine, uric acid, albumina, glucosa,ALAT,AST, all cholesterol, HDL, LDL i TG) as well as electrolytes (Na⁺, K⁺, Cl^–) in pregnant cows blood. The material was collected from the simentaler breed cows at the age between 3 to 5 years, which were 2th to 7th months pregnant. Together 48 subjects were examined.All values of analyzed hematological parameters fitted the physiological standards. However red blood cells indicators were noticed to increase. Most the biochemical indicators showed some deviations from the physiological standards. Only the concentration of glucose and urine acid achieved recommended level. The level of electrolytes is also considered to fit the referential norm statistically significant differences were observed in the area of the examined values of haematological, biochemical parameters and electrolytes in cows being in different month’s pregnancy.

The aim of the study was to estimate if addition of yeast product B.T. (Biertreber) to pregnant and lactating sows will be by colostrums and milk health and growth stimulater for piglets. The experiment was carried out on 30 multiparous crossbreeds wbpxpbz sows divided into 2 groups (15 animals in each). Sows from I (control) group were given from mating to the end of lactation period experimental mixtures LP and LK without any additives. Sows from the II (experimental) group were given the same experimental mixtures, but LPwith additive of 5% B.T. yeast and LK with additive of 4% of B.T. yeast. All piglets were given the same prestarter mixture from the 21st (weaning) to 45th day of life. Additive of B.T. yeast to pregnant and lactating sows brought same production profits. In the experimental group there were born and reared more piglets. These piglets obtained higher daily gains, were healther and there was stayed higher immunological status.

The aim of the work was to design a computer program which would be able to calculate relationship coefficients of a population or a subpopulation in the shortest possible time, applying directly the formula used in tabular method without creating any – permanent or temporary –relationship matrices. Data were pedigrees of 25 036 Polish Black andWhite bulls born in the years 1960–2000. The number of all animal ID’s found in the pedigrees was 63 264. From these data the input data set for the computer program has been created. The data set contained pedigrees of the form „animal-sire-dam“, sorted in chronological order. The number of all possible animal pairs was 2 001 135 216. The algorithm was tested on four different computers, three of them having multiprocessor architecture. The method used to calculate inbreeding and relationship coefficients involved recursive relationship function calls. The recursive method let not only cut the execution time of the program 10.7 to 18 times, but let prepare the programs for parallelization which was necessary to shorten computing time and to enable more complicated pedigree analysis and calculation of wide variety of statistics.

Research was conducted on eggs of Peking ducks from P11 and P22 flocks. Evaluation of egg quality was carried out at the age of 48 weeks (22nd week of egg laying). There were 30 eggs evaluated from each strain. Tests were carried out within 24 hours after obtaining the eggs. Ducks from strain P22 laid eggs of greater weight (89.2 g), length (65.7 mm) and width (49.2 mm) in comparison to strain P11 ducks respectively: 87.6 g, 64.9 mm and 48.8 mm. Moreover, eggs from P22 ducks had darker (51.6% white) and thinner egg shells (0.400 mm), and greater eggshell deformation (22.5 μm). Egg white fraction in P11 duck eggs was 57.7%and was significantly greater than in P22 eggs (56.1%), whereas yolk fractions were 32.6 and 34.6%, and were significantly greater in eggs of ducks P22 than in P11 strain. Greater values of density and pH of thin albumen and thick albumen were noted for P11 duck eggs in comparison to eggs obtained from P22 birds.

The investigation was carried out on the population of 104 adult Konik horses. These horses came from the stable breeding from the Wielkopolska region (Poland). Each individual was characterized by 22 measurements. On the basis of the Principal ComponentsAnalysis it was stated that there is a tendency for individuals’ exterior to diversify. Three types of Konik horses were found. Thanks to the Canonical DiscriminantAnalysis 13 (out of 22) metric features were pointed out which differentiate these types. The greatest importance for describing the type have the length of femur and length of the region of foot which consists of the skeleton of tarsus, metetarsus and phalanges. A big role was also attributed to the height at the withers, length of the trunk, width of the chest and circumference of the fore cannon. The observations allowed to conclude that exterior changes are connected with strengthening of riding features in the population of Konik horses.

The study was performed on 12 sport horses Blood was taken 3 times before and after exertion, also checked heart rate and count of breath.Made calculate indicates reaction on exertion and indicates sport success. Horses were divided into two groups, with lower indicate sport success (group I) and higher indicate sport success (group II). Made analyses differences between groups and between parameters before and after exertion. Horses with better sport results (group II) had more significant differences between blood parameters before and after exertion. They had lower mean hart rate after training and lower indicate reaction on exertion, than horses group I. In this study better tolerance exertion by horses group II, reflected better result in sport.