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Vlivy působící na hmotnost jehňat při narození
PITROVÁ, Ludmila
The aim of the Diploma thesis was to monitor and evaluate selected influences on the weight of lambs at their birth. There were used basic breeding records of 604 lambs of both sexes in the breed of Wallachian sheep from the farm Ing. Jan Vejčík for the analysis. Birth weights were evaluated according to sex, litter frequency, litter order, paternal line and the year of birth. The results of the comparison brought the following findings. The influence of the father on the live weight of the lambs at birth was confirmed by the F test based on the significance level (p < 0.05 to 0.01) as statistically significant to almost highly significant. Comparing the average weight of lambs at birth by father´s line, the birth weight of lambs of the VALVEJ line clearly prevails. Moderate differences were shown between the effects of the frequency and order of litter, the other in terms of importance was the influence of the year of birth of lambs. The effect of sex of live-born lambs was statistically insignificant.
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Vlivy působící na plodnost bahnic plemene valaška.
FREMLOVÁ, Aneta
The aim of this diploma thesis was the analysis of selected factors and their influence on the fertility of ewes in the Wallachian sheep breed. These factors were presented over the age of ewes for fertility, litter size and lamb survival. The second factor was the influence of the sire line on fertility, litter size and lamb survival. For this purpose, a farm in Dlouhá Stropnice was chosen. First the herd was introduced, then statistically described and finally a statistical analysis of selected factors was performed. Based on the achieved results, recommendations for breeders were proposed.
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The effect of iodine on functional parameters of ewes.
DUŠOVÁ, Hana
The aim of this work was to assess the long-term effect of excessive iodine intake on thyroid activity and selected immunological, haematological and biochemical parameters in blood of ewes and their lambs. The experiment was conducted from August 2009 to February 2010 in an experimental barn of Faculty of Agriculture, University of South Bohemia in České Budějovice. Into the experiment were used Šumava sheep breed ewes and their born lambs. Group A (control) consisted of 6 ewes after lambing was extended to 7 born lambs, group B (experimental) 6 of 6 ewes and lambs. Lambs were put into the experiment from the 1st to the 60th day after birth and received iodine in the milk of their mothers. Iodine supplementation to the diet of ewes was launched during the first to second months of pregnancy and finished 60 days after birth. During the experiment, a group of ewes A received 3,1 and group B 5,1 mg iodine per kg of dietary dry matter in the form of calcium iodate. During the experiment was regularly collected blood of ewes (before lambing and 1st, 10th, 30th and 60th day after birth) and lambs (1st, 3rd, 10th, 30th and 60th day after birth) to determine the concentration of thyroid stimulating hormone and immunoglobulin G (ELISA) in blood serum, thyroid hormones (RIA), total protein, urea and alkaline phosphatase activity in the blood plasma (biochemical analyser), the content of haemoglobin, white blood cell´s and red blood cell´s counts and haematocrit values in blood (haematological analyser), percentage of albumin, -1-globulins, -2-globulins, -globulins, and -globulins in blood serum (electrophoresis) and the content of iodine in the blood plasma, urine and milk of ewes (colorimetric method Sandell-Kolthoff). During the experiment were not observed in ewes and lambs clinical symptoms associated with an excessive intake of iodine. In experimental group of ewes with iodine intake 5,1 mg/kg of dietary dry matter were found higher values of thyroid stimulating hormone, lower values of free triiodothyronine, free thyroxine, IgG, white blood cells, -1-globulins, -2-globulin and -globulin, significantly lower values of -globulins after parturition, significantly higher values of urea and alkaline phosphatase activity. The iodine content in blood plasma, milk and urine of ewes is increased in direct proportion to its concentration in diet. Lambs of mothers with iodine intake of 5,1 mg/kg of dietary dry matter were significantly higher values of thyroid stimulating hormone from the 10th day after birth, significantly lower values of free triiodothyronine and free thyroxine first day after birth, immunoglobulin G and -globulins in 30th day after birth, lower (statistically significant in middle samples) values of total protein and white blood cells, higher values of urea and alkaline phosphatase activity. The weight gains of lambs were not significantly affected by iodine supplementation. These results in ewes with iodine intake of 5,1 mg/kg dietary dry matter and especially their lambs drawn to risk of reduce the activity of the thyroid gland and the negative impact of parameters of humoral immunity, mainly IgG and -globulins.
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Postnatal dynamics of thyroid hormones in lambs
BURLEOVÁ, Barbora
The aim of my work was to monitor and valorize of postnatal dynamics of thyroid hormones, thyroxine (TT4), triiodothyronine (TT3) and its free fractions (FT3 and FT4), in lambs up to 60 days of age. During the experiment 26 lambs were devided into two groups according to sex and were supplemented by iodine in concentration 0,7 ? 5 mg. Standard directed day ration for sheep is average 0,3 mg of iodine in 1 kilogram of dry mass (DM). One of the groups was also supplemented by selenium in concentration 0,2 ? 0,4 mg in 1 kilogram of DM.
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The effect of linseed oil to pregnant and lactating ewes for rearing lambs
KLÁTIL, Jaroslav
The aim of this thesis was to evaluate the influence of the addition of linseed oil to pregnant and lactating ewes to rearing of lambs. For more conclusive results ewes were divided into groups that received linseed oil (for testing) and the group without the constituents of linseed oil in the diet (control). Effect of linseed oil was demonstrated in ewes blood analysis. Analysis of blood parameters were monitored three - cholesterol, triglycerides and lipase. Physiological levels of cholesterol in sheep is 1,7 mmol.l-1. Before the test was observed in ewes cholesterol levels from 1,6 to 2,2 mmol.l-1 and after the test in the range from 1,3 to 1-9 mmol.l-1. Cholesterol after the test decreased in both the test and the control group. Natural levels of triglycerides in ewes is 0.8 mmol.l-1. In our case, the TAG content was below this threshold. Before the test from 0,18 to 0,22 mmol.l-1 after the test from 0.08 to 0.19 mmol.l-1. In test and control groups after the test content triglycerides decreased. After the test, reducing the content of the lipase in the test group and an increase of the content of the control group. Lambs of control and test group ewes were compared on the following criteria: average daily gain (higher increases should control group lambs), weight in control days, the chemical composition of meat - nitrogen, protein and fats. The normal composition of lamb meat: 21 % crude protein, 4,75 % fat and 1,1 % ash. In our case, the content of the NL test group 22,3 % and 21,8 % of the control group, the fat content of the test group and the control 6,5 % and 5,4 %, ash content in the test group and the control 1,23 % and 1,25 %. Further monitoring criteria: weight in carcass weight (between groups) and analysis of blood (cholesterol, triglycerides and lipase) - no difference between test and control lambs.
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Blood values of sheep at a defined intake of selenium and iodine
KOCÁBOVÁ, Ivana
The theoretical part is concerned with the functional application of selenium and iodine supplementation methods, risks disproportionate to their income, including changes in biochemical and hematological parameters and evaluation methods of adequate saturation. The practical part analyzes the results of experiments on sheep with a defined content of selenium and iodine in the ration evaluation of selected indicators of the metabolic profile of ewes and their lambs. The results are processed statistically. It reflected the dynamics and interactions of monitored parameters.
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