Zoran Z Ilić

• PfD
• University of Priština - Kosovska Mitrovica

The dynamics of increasing of bodyweight of lambs is conditioned by genetic factors, environmental factors and their interaction. The aim of this work was study variability of bodyweight of lambs related to type of birth of lambs in sheep genotype of four different strains of pramenka type and four growth stage: at the birth time, at the 30, 60 and...

Metabolic stress in early lactation cows is characterized by lipolysis, ketogenesis, insulin resistance and inflammation because of negative energy balance and increased use of lipids for energy needs. In this study the relationship between lipid metabolite, lipid-based insulin resistance, and hepatocyte functionality indexes and tumor necrosis fac...

The monograph aims to contribute to the successful breeding of sheep, to all those who accept science as a guide to a successful business, regardless of whether they already have sheep or are beginners in this business. Also, useful knowledge in this material can be found by pupils and students, and as a supplement to their education, experts in th...

Bovine Viral Diarrhoea (BVD) is a viral infection and important infectious disease of cattle caused by a pestivirus known as BVDV, with a major economic impact worldwide. The most important source of infection is persistently infected (PI) and diseased cattle. Except for the bovine infection, BVDV infection revealed in sheep, goats, swine and wild...

Izvod: Cilj ovog rada je bio da se odredi energetski i proteinski status krava rase Holštajn na osnovu promena vrednosti koncentracija masti, uree i proteina u mleku tokom postpartalnog perioda i pune laktacije. Životinje su svrstane u tri grupe. U prvoj grupi (Grupa 1, n=12),) nalazile su se klinički zdrave krave na samom početku laktacije, kod ko...

Abstract: Domaće šareno goveče u tipu simentalca je rasa goveda koja se najviše gaji na našim prostorima. Kvаlitet trupovа zаklаnih životinjа je predmet interesovаnjа, kаko primаrne proizvodnje, tаko i industrije mesа. Postupаk klаsirаnjа trupovа odnosno polutki sprovodi se u klаnicаmа neposredno nаkon veterinаrskog pregledа i utvrđivаnjа mаse trup...

Abstract: Domaće šareno goveče u tipu simentalca je rasa goveda koja se najviše gaji na našim prostorima. Kvаlitet trupovа zаklаnih životinjа je predmet interesovаnjа, kаko primаrne proizvodnje, tаko i industrije mesа. Postupаk klаsirаnjа trupovа odnosno polutki sprovodi se u klаnicаmа neposredno nаkon veterinаrskog pregledа i utvrđivаnjа mаse trup...

Izvod: Peripartalni period mlečnih krava se karakteriše pojavom mnogobrojnih metaboličkih bolesti i njihovim uticajem na kvalitet i ekonomičnost proizvodnje. Nakupljanje masti u jetri je čest nalaz kod krava za vreme kasnog graviditeta i u prve tri nedelje laktacije. Masna jetra predstavlja poremećaj metabolizma masti i ugljenih hidrata, a uslovlje...

Izvod: Peripartalni period kod mlečnih krava obuhvata 3 nedelje ante partum i 3 nedelje post partum (eng., transition period). Predstavlja najkritičniju fazu u životu mlečnih krava, jer se u organizmu odigravaju metaboličke, endokrinološke, imunološke i reproduktivne promene, koje utiču na ekonomičnost proizvodnje. U tranzicionom periodu (kasna bre...

ABSTRACT The objective of this study was to determine blood and milk metabolites and their interrelationships to evaluate the metabolic status in dairy cows for early diagnosis of subclinical metabolic disease at different stages of lactation. For this study, blood and milk samples were taken from 36 Holstein dairy cows during morning milking. The...

Background: Major changes in the metabolic functions in high-yielding dairy cows occur during the transitional period and during lactation. Parturition and lactogenesis are accompanied by many physiological changes that facilitate the maintenance of homeostasis Consequently, physiological situations leading to a negative energy balance are coupled...

By using prebiotic supplements in domestic animals many positive effects were observed considering the regulation of the microbiological balance in digestive system, as well as the facilitated growth and the food conversion, even the positive effect on immunological system. Digestion system in the calf make proper basis for the development of the m...

The aim of this paper is to present a review of the most important points that are relevant to the successful use of rams in sheep reproduction. Rams play a big role and fertility in rams can be caused by many factors which can causes of infertility or reduced fertility. Body temperatures produced in rams by high summer temperatures is a cause of p...

The purpose of the research was to examine the impact of feed additive on calf rearing and cow's milk used by humans, which is significant for milk production efficiency. Lactation starts with the birth of a calf, lasts cca 305 days and ends cca two months before new calf is born. Cow is constantly producing and that is why it is necessary to secur...

Ketosis is a common disease in high producing dairy cows during the early lactation period. Subclinical ketosis (SCK) and periparturient diseases considerably account for economic and welfare losses in dairy cows. Subclinical ketosis poses an increased risk of production-related diseases such as clinical ketosis, displaced abomasum, retained placen...

Bovine respiratory disease complex (BRDC) is the biggest health problem of the cattle industry globally due to the high prevalence and economic consequences which arise due to numerous reasons. Huge economic losses are most often attributed to high morbidity and mortality, reduction of Average Daily Gain (ADG) and food utilization, weight loss, low...

The aim of this study was to determine the prevalence of extended spectrum beta-lactamases (ESBLs) production in hospital strains of Enterobacteriaceae isolated from various clinical specimens (urine, blood and wound swabs) from hospitalized patients at the Military Medical Academy, Belgrade, Serbia. During six months of study, a total of 1034 isol...

Some problems of modern analysis of the genome of domestic animals and the possibility of applying the results of the research in the selection have considered. Molecular genome analysis has progressed rapidly. Today, using modern DNA analysis, the domestic animals breeding value can be safely foreseen. Based on the scientist's intuition of early-2...

Abstract: BRDC causes pneumonia of cattle, due to which high morbidity and mortality, decreasing food intake and daily growth, and quality of carcasses is significantly reduced. Preventive application of cattle vaccination and treatment of diseased animals with therapeutic agents, with the aforementioned losses, leads to the fact that BRDC is the m...

Objective: The objective of this study was to determine correlation between serum blood and milk enzyme activities of aspartate- aminotransferase (AST), alanine-aminotransferase (ALT) and alkaline-phosphatase (ALP) in the different stage of lactation in dairy cows as markers for diagnosis subclinical metabolic diseases.

Objective: According to blood biochemical indicators, ketosis in cows may be diagnosed when the following values match the clinical signs: beta-hγdroβγbutγrate (BHB) > 1.2 mmol/l, glucose < 2.5 mmol/l, and triglycerides (TG) < 0.12 mmol/l, and blood values: non-esterified fattγ acids (NEFA) > 0.7 mmol/l and aspartate-transaminase (AST) activity abo...

Introduction. The aim of this study was to determine and compare levels of blood serum calcium, inorganic phosphorus and magnesium in the peripartal period and during mid lactation in Holstein dairy cattle. Materials and Methods. Blood samples were collected from 12 cows in late pregnancy, 12 early lactation cows, and 12 mid lactation cows. Results...

This study has been conducted on the domestic sheep Pramenka that is a dominant breed in Serbia. The purpose is to determine the effects of mother’s age on suckling and growth of lambs, and to find out at which week the lambs are normally weaned. Research was carried out on 1800 lambs of four strains (Svrljiški, Pirotski, Sjeniĉki, Šarplaninski) of...

The aim of this study was to examine the possibilities of bottling the water from four sources (in total 10 springs) on Jastrebac Mountain in central Serbia. In the water samples, the following parameters were determined: • Physico-chemical parameters – temperature and solids content (total, dissolved and suspended), turbidity, pH, conductivity, ha...

The aims of this study were to determine the status of small ruminant production in Serbia and to provide projections for their sustainable use with optimal strategy of genetic improvement of sheep and goats in the future. For sustainable sheep and goat production, it is necessary to know a number of biological, technological, organizational and ma...

The objective of the present study was to investigate nutritional and metabolic status in Simmental cows during early and mid-lactation. Fifteen early lactation cows and 15 mid lactation cows were chosen for the analysis. Blood samples were collected to measure beta-hydroxybutyrate (BHB), non-esterified fatty acids (NEFA), triglycerides (TG), gluco...

The objective of this study was to determine correlation between serum blood and milk enzyme activities of aspartate-aminotransferase (AST), alanine- aminotransferase (ALT), alkaline-phosphatase (ALP in the 36 dairy Holstein cows divided into three groups according to production period. Group 1 consisted cows in the start of lactation (n = 12); Gro...

Considering the Serbia's potential and tradition in production of quality beef meat as food for human consumption and raw material in the food industry and the demand of the EU market, shows the need to intensify the production of this foodstuff. Aim of this paper was to analyze the effect of age of young Simmental bulls on dressing percentage in s...

Sjenicki sir je jedan od nasih najpoznatijih sireva iz grupe belih sireva u salamuri. Proizvodi se autohtonom tehnologijom na podrucju Sjenicko-Pesterske visoravni, a u poslednje vreme i industrijski u mlekarama. Istraživanja imaju za cilj da se kroz randman proizvodnje sira pokažu komparativne prednosti ovcijeg mleka za proizvodnju sira, stepen is...

The external appearance of domestic animals, or the development and mobility of individual parts of the body, and everything else that on the animals can be seen, represents a significant information on the total value of an animal. Since ancient times, the method applied to estimates of farm animals was based on their exterior appearance, where mu...

The objective of the present study was to investigate nutritional and metabolic status in Simmental cows during early and mid-lactation. Fifteen early lactating cows and 15 mid lactating cows were chosen for the investigation. Blood samples were collected to measure beta-hydroxybutyrate (BHB), non-esterified fatty acids (NEFA), triglycerides (TG),...

The main purpose of this article, was investigation metabolic and endocrine status in Simmental dairy cows during transition period and mid lactation, based on the relationships between blood growth hormone (GH), insulin, triiodothironine (T3), thyroxine (T4), glucose, beta-hydroxybutyrate (BHB), non-esterified fatty acids (NEFA) and triglycerides...

Aim of the study was to analyze the slaughter performance and carcass yield of lambs purebreds and crossbreds. For the determination of slaughter performance four genotypes were used in the study: purebred Pirot Pramenka (P), Wurttemberg (W) and crossbred Twobreed crosses F1 Pirot x Wurttemberg (PxW), three-breed crosses F1 Pirot x Wurttemberg x Il...

The objective of the present study was to evaluate the endocrine and metabolic changes in Simmental dairy cows during the transition period and mid lactation. Fifteen late pregnant cows, 15 early lactation cows and 15 mid lactation cows were chosen for the analysis. Blood samples were collected to measure growth hormone (GH), insulin, triiodothyron...

The aim of this article is to provide a historical summary of worldwide Bovine Viral Diarrhoea Virus (BVDV) prevalence data through a number of studies, review the current knowledge and published data on the presence and prevalence of BVDV infection among ruminants in Serbia, and consequently open questions as to the possibilities for the implement...

In the investigation utilized 800 head of Pirot improved sheep during two lactation numbers (I and II) and two lactation seasons: I – winter, and II – summer. Investigated the influence of some factors on milk yield, fat content, protein content, pH value, SCC (somatic cell count) and CFU (total number of microorganismis). Control of milk yield was...

Success of crossing depends on the breeds used and the genetic distance among them, as well the combining ability of maternal and individual heterosis to make the proper choice of breeds employed in a crossing system. The aim of this study is to find the effect of genotype and crossing system on early weights and daily gain of lambs. The lambs of p...

Linear assessment of the type and body development provides very important information on the total value of animals for the purpose of breeding animals selected and classified into classes. Determination of the average values of exterior parameters, especially non-measurable traits, is useful in defining breeding objectives and formulating effecti...

The aim of the present study was to estimate of blood glucose utilization by peripheral tissue on the basis of changes in blood concentrations of glucose, insulin and inorganic phosphorus (iP) in healthy (n=8) and ketotic cows (n=7) during an intravenous glucose tolerance test (IVGTT). After intravenous infusion of a total of 500 ml of 50% of gluco...

The objective of this study was to determine blood levels of macro- and micronutrients in Simmental cows (n=45) during the transition period and full lactation. The experimental cows were assigned to three groups: Group A (n=15) including clinically healthy late gestation cows, Group B (n=15) comprising clinically healthy cows in the puerperium, an...

Research on bovine respiratory disease complex (BRDC) has strongly contributed to a better understanding of disease at both global and local levels. New agents have been identified and their nature has been better known since then, as well as all the factors that predispone the development of BRDC. Serious work in a number of researches has led to...

The study included lambs of Mis population, divided into two groups (experimental and control) .All the animals fed with identical portions of meals consisted of alfalfa hay and fully concentrate mixtures. Meals are only different in the fact that the experimental group received organic selenium and contained 2000 mg of selenium / kg preparations,...

The large number of sheep, especially the ones that spend the majority of time on pastures, is been fed with the meals, which do not contain all the necessary mineral substances. The level of calcium, phosphorus and magnesium on natural pastures is too low in relation to the needs of sheep. Therefore, the irregularity in the feeding of sheep occurs...

The aim of the present study was to determine the degree of blood glucose utilization by peripheral tissue on the basis of changes in blood concentrations of glucose, insulin and inorganic phosphorus in healthy (n=8) and cows with ketosis (n=7) after intravenous infusion of glucose solution. After intravenous infusion of a total of 500 ml of 50 % o...

Two genotype of sheep have been utilized in the conduct of the experiment composed of 60 ewes from Pirot x Virtemberg as genotype 1 and 60 ewes of Improved Pirot as genotype 2. All the ewes were reared under identical conditions and without any differences in nutrition and management during the whole period under study. The collection of Milk sampl...

In this paper, the results of fattening and meat characteristics of lambs of the new breed of sheep in Serbia, called Mis sheep, are presented. Mis breed as a meaty type of sheep, has been developed for the past 20 years at the Institute of Animal Husbandry, Belgrade-Zemun. The total and daily gains in 1-30 days were of 7.5 kg and 250 g, and in 61-...

This study examined the activities of aspartate-aminotransferase (AST), alanine- aminotransferase (ALT), gamma-glutamyltransferase (GGT) and lactate-dehydrogenase (LDH) in the blood serum of 45 dairy Simmental cows divided into three groups according to production period. The first group (n = 15) consisted of late pregnant dairy cows, the second gr...

The objective of this study was to evaluate organic and inorganic blood parameters, i.e. indicators of metabolic status in dairy cows (n=30) during the transition period. The cows were divided into two groups. The first group (n=15) comprised clinically healthy prepartal cows, and the second one included clinically health postpartal cows (n=15). Bl...

The objective of this experiment was to evaluate the metabolic status of late pregnant and early lactation dairy cows based on changes in characteristic blood metabolites. Blood samples were collected from 15 late pregnant cows and 15 early lactation cows to measure beta-hydroxybutyrate (BNB), non-esterified fatty acids (NEFA), triglycerides (TG),...

The list of alternative products take up an important place especially oligosacharides, Mannan-oligosacharides (Bio-Mos), which proved to be very effective in improving the health status and performance of animals. Two groups of calves were formed: control and experimental. The ration of experimental calves was supplemented with 4 g of prebiotics m...

The basic scientific goal of this investigation was to make a complex view and study of milking traits in two Simmental cow groups in the production conditions of Southern Serbia. A total of 100 Simmental first calving cows were investigated. The first calving cows originally arrived from Germany and a comparison of productive abilities with their...

Bovine viral diarrhoea virus (BVDV) and infectious bovine rhinotracheitis virus (IBRV) are important viral diseases around the world. The objective of this study was to estimate the prevalence of seroconversion to BVDV and IBRV. Serum samples from 152 bovines were collected from two counties (Tulcea and Brăila) in the southeastern region of Romania...

Bovine viral diarrhoea virus (BVDV) and infectious bovine rhinotracheitis virus (IBRV) are important viral diseases around the world. The objective of this study was to estimate the prevalence of seroconversion to BVDV and IBRV. Serum samples from 152 bovines were collected from two counties (Tulcea and Brăila) in the southeastern region of Romania...

The objective of this experiment was to evaluate the metabolic status of late pregnant and early lactation dairy cows based on changes in characteristic blood metabolites. Blood samples were collected from 15 late pregnant cows and 15 early lactation cows to measure beta-hydroxybutyrate (BHB), non-esterifified fatty acids (NEFA), triglycerides (TG)...

Fifteen early-lactation cows and 15 mid-lactation cows were chosen for the analysis. Blood samples were collected to measure the beta-hydroxybutyrate (BHB), non-esterified fatty acids (NEFA), triglycerides (TG), glucose (Glu), total protein (TP), albumin (ALB), total bilirubin (TB), urea (U) and the activity of aspartate transaminase (AST) and gamm...

The birth weight of lambs has an essential role in satisfying sheep production. Also reflected as primary factor later development of young organism. In the study included: gestation length, sire (two sires in each genotype during parenting), sex of lambs at birth, the birth weight of single lambs from well nourished mature ewes of the next genotyp...

The fastest phase of growth, observed in young animals, is often assumed to be linear, and linear regressions or ratios between BW gain and time are used to model growth. However, growth curves, due to their flexibility, are likely to be more suitable to describe even early growth. The research was performed in the region of Sharplanina Mountain in...

Estrus synchronization methods was use to control the reproductive traits of sheep, as well as bringing more females at the same stage of estrus and ovulation. According to the points mentioned above, the aim of the present study was to investigate and compare mating method and influence of fixed factors on birth and weaning weight of lambs. Statis...

On a small closed population of Mis sheep the relationship was studied of the influence of inbreeding on body weight growth from birth to the age of 18 months and sperm DNA fragmentation in rams. Two groups of male lambs were used. First was composed of outbred, while the second of inbred animals with inbreeding coefficient over 25%. Differences in...

Data from the Pirot improved sheep were use to estimate postnatal development and growth traits relationship of lambs from birth to weaning. The experiment included 360 lambs, divided into three groups (I, II, III). Lamb traits included BW at birth and approximately 30d, 60d and 90d (weaning). Lambs managed under conditions typical of the area. Mal...

This paper presents the results of reproductive characteristics and body development of the new breed of sheep in Serbia, called Mis sheep. Mis sheep as a type of sheep for meat, had been developed for the past 20 years at the Institute of Animal Husbandry, Belgrade-Zemun. Main method of development is complex combinatory three-breed crossing. As m...

Pathogens causing BRDC in Serbia were investigated. Two herds of beef cattle with bovine respiratory disease were included, with twenty diseased calves (10 from each farm) were chosen for isolation of bacteria on artificial culture media and determination by aerobic cultivation. The most common bacterial pathogen was isolated was Pasteurella multoc...

The objective of the present study was to determine metabolic status in late pregnant (n = 15) and puerperal (n = 15) Simmental dairy cows. The various blood metabolites and serum enzyme activities were determined by photometric methods. The early lactation cows had the indicative values of the beta-hydroxybutyrate (BHB) (> 1.20 mmol/l) but did not...

The paper presents the results of a research on the impact of products based on natural zeolite on the production results of fattening lambs. The experiment involved two groups of lambs (the control-C and experimental – E groups), each consisting of 15 heads, for a period of 90 days. The meal was made from sheep milk, feed mixtures for fattening la...

Research was conducted on animals of Balkan goat breed. The impact of environmental factors on the weight of kids was analyzed, and also the value of genetic parameters of growth traits of kids to weaning had been examined. The body weight of kids varied depending on the year from 2.27±0.09 kg to 2.43±0.08 kg at birth and 10.81±0.58 kg to 11.13±0.5...

Spasic Z., B. Milosevic, N. Lalic, S. Samardzicc, Z. Ilic, and B. Ristanovic (2012): Comparation of heredity coefficients of productive traits in the population of black white cows. - Genetika, Vol 44, No. 2, 317 - 324. On the basis of genetic variability of economically important traits we orientate ourselves toward specific methods development an...

Efficiency of sheep production is conditioned by fertility. According to some authors number of offspring obtained per lambing is more important than gain of weight. Genetic relationships involving reproductive traits were seldom studied. Reproductive traits have low heritabilities, a discrete phenotypic expression, and are expressed only in sexual...

Livestock production is an important branch of agriculture in the Republic of Serbia because it provides necessary products (milk, meat, eggs). In addition, livestock production provides raw materials for food industry and leather industry. Livestock production is expected to provide quality products for export, primarily beef and lamb. There is an...

Investigations were carried out in order to determine whether the addition of bioactive substances "Bioril" on different percentages in concentrate (0.3% and 0.6%), has an impact on weight gain and feed conversion in lambs. For the experiment were used lambs of Mis sheep breed, which at the beginning of the experiment were 50 days of age. The exper...

Merinolandschaf sheep breed was used to estimate relationship between the next traits: Body weight of adult ewes (BW), Height to withers (HW), Body length (BL), Girth of Chest (GC), Rump Width (RW), Body weight of lambs at birth (BWB), Body weight of lambs at weaning (BWW). The collected data were from 750 sheep and their lambs during the period of...

Some phenotypic and genetic trends on growth traits of lambs are observed. The research implicated lambs of two local breeds of sheep: Lipska (LP) and Svrljig (SV). All lambs were weighed for the first time at birth (BWB), and thereafter, regularly in two-week intervals. On the basis of the results during weighing the body weight (BW) were adjusted...

The objective of the present study was to determine a relationship among blood indicators of hepatic function and lipid content in the liver during transitional period in dairy cows. Late pregnant and calved cows (n= 40) were selected from a Holstein dairy herd and allocated to four groups: a late pregnant cows (n=10) from day 15 to day 5 before ca...

Water samples from all 3 basins (Zlatari, Vasići and Vodozahvat) of Ćelije Reservoir (Serbia) at different depths were taken, and abundance and morphotype diversity of bacterioplankton were investigated. The total number of bacteria in samples was determined by a direct method, counting with an epifluorescence microscope after staining by acridine...

The amount of calcium, phosphorus and magnesium in milking cows, blood was tested and it is one of indicators that cows were fed with these substances. The average amount of calcium, phosphorus and magnesium in blood of milking cows was tested and it is one of indicators that cows were fed with these substances. The average amount of calcium in tes...

The paper presents the results of a research on the impact of products based on natural zeolite on the production results of fattening lambs. The experiment involved two groups of lambs (the control-C and experimental – E groups), each consisting of 15 heads, for a period of 90 days. The meal was made from sheep milk, feed mixtures for fattening la...

By using prebiotic supplements in domestic animals many positive effects were observed considering the regulation of the microbiological balance in the digestive system, as well as the facilitated growth and the food conversion , even the positive effect on immunological system. The digestion system in the calf makes proper basis for the developmen...