Ivan Žarković | University of Novi Sad (original) (raw)
Address: Novi Sad, Autonomna Pokrajina Vojvodina, Serbia
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Papers by Ivan Žarković
CERN European Organization for Nuclear Research - Zenodo, Dec 15, 2014
A significant reduction in the boar sperm quality during the warmer season of the year is a well-... more A significant reduction in the boar sperm quality during the warmer season of the year is a well-known phenomenon which directly<br> contributes to a considerable decrease in the fertility of sows artificially inseminated (AI) during the period. The purpose of this study is to determine whether the conventional intracervical AI combined with the synthetic seminal plasma Predil MR-A® can increase the fertility of sows inseminated in warm seasons. The obtained results show that the insemination with Predil MR-A® significantly increases the farrowing rate (82%) in the warm periods of the year in comparison with the control sows (72%). Although an increasing trend in the average number of live born piglets per litter was recorded in the sows inseminated with Predil-MRA®, this increase was not statistically significant (p <0.05) both within or between the observed seasons (ranging from 14.65 to 15.41 piglets per litter ). The obtained results can increase the total efficiency of...
Previous studies demonstrated that protein content in boar seminal plasma were highly correlated ... more Previous studies demonstrated that protein content in boar seminal plasma were highly correlated with fertility of boars. The purpose of the present study was to determine if protein content in seminal plasma significantlyvaries betweenboars, as well as if season of the year, boar breed or age significantly influence protein content in seminal plasma. In the first experiment, semen was collected weekly for 12 months, from 4 boars (48 ejaculates per boar). In the second experiment, two ejaculate per boars were taken from 106 boars (total 212 ejaculates) at commercial pig farm in Serbia. Total protein content in seminal plasma was determined for each collection. Protein content in seminal plasma considerably varies between individual boars (from 1.5% to 4.6%). More than 50% of boars had less than 3% protein in the seminal plasma. Protein content in seminal plasma is quite constant in the ejaculates of the same boar, at the one ejaculate per week collection frequency condition, with very little variations between months during the year. Boar breed or age did not have a significant (P>0.05) impact on the protein content in seminal plasma (Landrace=2.98%; Large White=2.92% and Duroc=3.01%; ≤16 months=3.04%, 17 to 20 months=3.14%, 21 to 24 months=3.03 and ≥ 25 months=2.74%). These data indicated that the seminal plasma protein content could be genetically determined for each single boar. Consequently, these findings support the assumption that quantification of protein content in seminal plasma could serve as a powerful tool to improve boar fertility and reproductive performance.
Palliative Medicine, 1999
Testing was performed on the effect of a final body weight in performance test on the thickness o... more Testing was performed on the effect of a final body weight in performance test on the thickness of the sidefat, backfat thickness and depth of musculuslongissimusdorsi (MLD) of Swedish Landrace boars. The study included 228 boars. Features included in the study were: fat thickness (S1), fat thickness (S2) and the depth of the of musculuslongissimusdorsi (MLD). Backfat thickness was 13,66mm, thickness of sidefat 13,2mm and average depth of MLD is 62,6mm. There was a statistically significant effect on final body weight on investigated traits. There was also a significant correlation between the final body weight in the performance test on backfat thickness 0.35 (P <0.05); the thickness of the sidefat 00.25 (P <0.05) and the depth of the MLD 0.19 (P <0.05). In order to obtain a clearer picture of the impact of the final mass in the performance test, groups were formed: I (over 109kg); II (103-109kg); III (97 to 102.9 kg) and IV (less than 96.9 kg). First group established the...
In intensive pig production one of the basic requirements for reaching effective reproduction is ... more In intensive pig production one of the basic requirements for reaching effective reproduction is to achieve and provide a sufficient number of good pregnant gilts in order to replace and repair the sow heard base. This gilts at the fertile inseminations despite the high genetic predisposition for certain productive and reproductive features, must have a minimum age, body weight, backfat thickness and an optimum status of reproductive activity. The aim of this study was to investigate a connection of uterus capacity and reaching puberty in gilts. The use date has been given during the comparative analyses of morphological parameters the uterus mass without ligaments, cervices and ovaries. For the testing data were used 592 animals. The researches were made in worm and cold period of the year. The animals were sacrificed with 210 days of age. Based on the determined morphological structure of the ovary the stage of sexual maturity has been determinate namely: before reaching puberty, animals with first and second estrous cycle.
CERN European Organization for Nuclear Research - Zenodo, Dec 15, 2014
A significant reduction in the boar sperm quality during the warmer season of the year is a well-... more A significant reduction in the boar sperm quality during the warmer season of the year is a well-known phenomenon which directly<br> contributes to a considerable decrease in the fertility of sows artificially inseminated (AI) during the period. The purpose of this study is to determine whether the conventional intracervical AI combined with the synthetic seminal plasma Predil MR-A® can increase the fertility of sows inseminated in warm seasons. The obtained results show that the insemination with Predil MR-A® significantly increases the farrowing rate (82%) in the warm periods of the year in comparison with the control sows (72%). Although an increasing trend in the average number of live born piglets per litter was recorded in the sows inseminated with Predil-MRA®, this increase was not statistically significant (p <0.05) both within or between the observed seasons (ranging from 14.65 to 15.41 piglets per litter ). The obtained results can increase the total efficiency of...
Previous studies demonstrated that protein content in boar seminal plasma were highly correlated ... more Previous studies demonstrated that protein content in boar seminal plasma were highly correlated with fertility of boars. The purpose of the present study was to determine if protein content in seminal plasma significantlyvaries betweenboars, as well as if season of the year, boar breed or age significantly influence protein content in seminal plasma. In the first experiment, semen was collected weekly for 12 months, from 4 boars (48 ejaculates per boar). In the second experiment, two ejaculate per boars were taken from 106 boars (total 212 ejaculates) at commercial pig farm in Serbia. Total protein content in seminal plasma was determined for each collection. Protein content in seminal plasma considerably varies between individual boars (from 1.5% to 4.6%). More than 50% of boars had less than 3% protein in the seminal plasma. Protein content in seminal plasma is quite constant in the ejaculates of the same boar, at the one ejaculate per week collection frequency condition, with very little variations between months during the year. Boar breed or age did not have a significant (P>0.05) impact on the protein content in seminal plasma (Landrace=2.98%; Large White=2.92% and Duroc=3.01%; ≤16 months=3.04%, 17 to 20 months=3.14%, 21 to 24 months=3.03 and ≥ 25 months=2.74%). These data indicated that the seminal plasma protein content could be genetically determined for each single boar. Consequently, these findings support the assumption that quantification of protein content in seminal plasma could serve as a powerful tool to improve boar fertility and reproductive performance.
Palliative Medicine, 1999
Testing was performed on the effect of a final body weight in performance test on the thickness o... more Testing was performed on the effect of a final body weight in performance test on the thickness of the sidefat, backfat thickness and depth of musculuslongissimusdorsi (MLD) of Swedish Landrace boars. The study included 228 boars. Features included in the study were: fat thickness (S1), fat thickness (S2) and the depth of the of musculuslongissimusdorsi (MLD). Backfat thickness was 13,66mm, thickness of sidefat 13,2mm and average depth of MLD is 62,6mm. There was a statistically significant effect on final body weight on investigated traits. There was also a significant correlation between the final body weight in the performance test on backfat thickness 0.35 (P <0.05); the thickness of the sidefat 00.25 (P <0.05) and the depth of the MLD 0.19 (P <0.05). In order to obtain a clearer picture of the impact of the final mass in the performance test, groups were formed: I (over 109kg); II (103-109kg); III (97 to 102.9 kg) and IV (less than 96.9 kg). First group established the...
In intensive pig production one of the basic requirements for reaching effective reproduction is ... more In intensive pig production one of the basic requirements for reaching effective reproduction is to achieve and provide a sufficient number of good pregnant gilts in order to replace and repair the sow heard base. This gilts at the fertile inseminations despite the high genetic predisposition for certain productive and reproductive features, must have a minimum age, body weight, backfat thickness and an optimum status of reproductive activity. The aim of this study was to investigate a connection of uterus capacity and reaching puberty in gilts. The use date has been given during the comparative analyses of morphological parameters the uterus mass without ligaments, cervices and ovaries. For the testing data were used 592 animals. The researches were made in worm and cold period of the year. The animals were sacrificed with 210 days of age. Based on the determined morphological structure of the ovary the stage of sexual maturity has been determinate namely: before reaching puberty, animals with first and second estrous cycle.