|
|
Analýza parametrů reprodukce prasnic ve vybraném chovu
HLATKÁ, Tereza
The aim of the thesis was to analyze the influences affecting the fertility of sows (number of piglets/1 litter) in the monitored breeding from the period 2017 to 2023. The highest number of piglets was in 2023, with a total of 15.89 born, out of which 13.53 were born alive (a difference of 2.36 piglets). The lowest number of piglets was in 2017, with 13.78 born in total, out of which 12.34 were born alive. Within the genotype, the highest number of piglets was recorded in the landrace breed sows, with a total of 15.05 born and 13.52 born alive. Conversely, in the duroc breed, the number of born piglets was 10.88 in total, with 9.35 born alive. There was a consistent difference of 4.17 piglets (P<0.05) between the two breeds in both total and alive births. For hybrid sows of genotype YL and (YL)D, there was a difference of 0.88 piglets (P<0.05) in total born and 0.67 (P<0.05) in alive born. The lowest number of total born piglets (14.04) and alive born piglets (12.81) were born to sows in their 1st and 2nd litter. Sows in their 3rd-5th litter showed the most total born piglets (15.25) and alive born piglets (13.48). From the 6th litter onwards, there was a downward trend in the number of piglets, with a significant drop observed in alive born, by 0.55 piglets (P<0.05). Sows inseminated at 250 days old had a litter frequency of 13.12 total born piglets and 12.09 alive born piglets. Sows inseminated at 251 days old had a litter frequency of 14.37 total born piglets and 13.13 alive born piglets, with a difference of 1.25 total born and 1.04 alive born. With the prolongation of sow gestation length, there was a slight decrease in both total and alive born piglets. Sows with a farrowing interval 147 days had a higher number of total born piglets (15.34). With an interval 148 days, the number of total born piglets was 0.48 lower (P<0.05). The same trend was observed for alive born piglets, with a difference of 0.37 (P<0.05) between sow groups. Sows with an interval from weaning to insemination 4 days achieved a higher number of total born piglets (15.31) compared to sows with an interval 5 days (14.88), with a difference of 0.43 piglets. The same trend was observed for alive born piglets, with a difference of 0.34 piglets.
|
|
|
Účinek bisfenolu S na vybrané krevní parametry potkanů
HLATKÁ, Tereza
Bisphenol S (BPS) is an organic substance which has replaced significantly industrially used bisfenol A (BPA). Eventhough BPS shows higher tolerance against physical influence, there have been registered leaks from the final products and there is a posibility of wather, food and environtment contamination. Until now the BPS has been, just like BPA, mostly connected with disruption of the reproductive system of human and animals. The aim of the bachelor thesis was to determinate whether a ten weeks oral exposure to BPS (50 ?g, 100 mg/kg live weight/day) leads to disturbance in selected haematological parameters (erythrocyte count (RBC), haemoglobin concentration (HGB), haematocrit value (HCT), mean corpuscular volume (MCV), erythrocyte haemoglobin concentration (MCHC), mean corpuscular haemoglobin (MCH), total leucocytes, percentage of granulocytes, lymphocytes and monocytes). Eighteen Wistar Han rats were enrolled in the experiment and they were divided into three groups (control group, 50 ?g BPS, 100 mg BPS). Dissolved BPS in sunflower oil was given to the experimental groupts by a gavage. Blood was collected through cardiac puncture and analyzed using an automated hematology analyser. In the particular study, we found out a nonsignificant decrease of HGB and nonsignificant increase of MCV and MCH in experimental animals. BPS also led to a nonsignificant changes in the number of leukocytes (increase in the total number of leukocytes) and it led to a changes in the number of individual types of the white blood cells representation (increase in the percentage of granulocytes, decrease in lymphocytes). More significant effect was observed in 50 ?g BPS group. Our results did not conclusively proved the negative effect of BPS on the selected blood parameters of rats.
|
guest ::
