Browsing by Author "Tuncer, Selcuk Seckin"

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Comparison of Reproductive Performance, Live Weight, Survivability, and Fleece Characteristics of Indoor-Raised Central Anatolian Merino and Malya Sheep
(Revista Brasileira Zootecnia Brazilian Journal Animal Sci, 2022) Behrem, Sedat; Tuncer, Selcuk Seckin; Senyuz, Hasan Huseyin
This study was conducted to compare Central Anatolian Merino (CAM) and Malya sheep under intensive conditions in terms of reproductive traits, birth and weaning weights, fattening performance, and some fleece characteristics. In this study, 840 CAM and 194 Malya ewes were used for the comparison of reproductive performance, whereas 740 and 211 lambs were used to compare growth traits between the two breeds. Additionally, the fattening performance of 61 CAM and 68 Malya lambs were compared. Finally, for the comparison of wool quality traits, 94 CAM and 90 Malya lambs were used. The lambs were kept together with the sheep that gave birth to them for 10 days. After this period, lambs were given lamb starter feed, alfalfa hay, and vetch hay in addition to milk. When lambs reached 40 days old, they were taken to the pasture with the sheep. In this period, pasture grass, growing lamb concentrate feed, alfalfa hay, and vetch hay were given in addition to milk. Lambs were weaned when they reached an average age of 90 days, and their live weights were determined. A determined number of lambs was selected from weaned male lambs. For these animals, in the fattening period, barley, alfalfa hay, vetch hay, meadow hay, and lentil straw were provided ad libitum in addition to 400 g/day/head of fattening feed. This study indicated that birth rate was better for CAM sheep than for Malya sheep. However, Malya lambs may have more advantages than CAM lambs in terms of survival and fattening performance. Although birth weight was higher for Malya sheep than for CAM sheep, the opposite result was observed for the weaning weight. The beginning weights of fattened male lambs were higher for CAM lambs than for Malya lambs, but the ending weights of both fattened groups were similar.
Effect of Sheep's Different Nutritional Conditions on Microelements (Cu, Zn, Co) in Their Blood Serum
(Polish Society Magnesium Research, 2022) Tuncer, Selcuk Seckin
This study aimed to compare the levels of copper, zinc, and cobalt minerals in the blood serum of sheep under different nutritional conditions. The study was conducted on 1-2-year-old, healthy Norduz sheep raised at the Agricultural Research and Implementation Center of Van Yuzuncu Yil University. A total of 30 sheep made up three equal groups: a control group (group C; n=10) and two experimental groups (groups 1 and 2; n=10 in each group). Randomly selected animals from all the groups were grazed on low-quality pastures during a 4-week experiment. Each animal in group C was supplied with a total of 900 g day(-1) of feed containing 850 g day(-1) of mixed grass-clover and 50 g day(-1) of barley. Each animal in groups 1 and 2 was supplied with 850 g day(-1) of mixed grass-clover and weekly increasing quantities of barley during the experiment as follows: 915 g day(-1) in the first week, and 945 g day(-1), 960 g day(-1), 980 g day(-1), in the second, third and fourth weeks, respectively. Animals in the second group were additionally fed with 500 g day(-1) of feed concentrate per head throughout the 4-week experimental period, unlike the other groups. This study determined that - in addition to pasture grazing - feeding with mixed grass-clover hay, extra barley and concentrates should be provided to ensure adequate Cu levels. Moreover, it was also found that pasture grazing could be sufficient for Zn intake, in contrast to Co levels, which fall below normal limits even if the quality of a diet is improved.
Effects of Different Diets on Hematological Parameters and Immunoglobulin Levels in Norduz Sheep
(Polish Society Magnesium Research, 2021) Tuncer, Selcuk Seckin
In this study, changes in the hematological parameters and immunoglobulin levels of sheep fed different diets were investigated. Healthy, nonpregnant, female Norduz sheep age 1 - 2 years with live weights of 50 - 55 kg that were raised at the Agricultural Research and Implementation Center of Van Yuzuncu Yil University constituted the animals used in this study. A total of 40 sheep comprised three groups: a control group (n = 20) and two experimental groups (n = 10 in each group). During daylight hours, the sheep grazed primarily on low-quality pasture and lesser amounts of grass. In addition to pasture grazing, all groups were supplied with 850 g d-1 of mixed grass-clover hay per head. Aside from pasture grass and mixed grass-clover hay, the control group animals were also supplied with 50 g d-1 of barley per head. Each animal in the experimental group (groups 1 and 2) was also supplied with increasing amounts of barley each week: 65 g d-1, 95 g d-1, 110 g d-1, and 130 g d-1 in the first, second, third, and fourth weeks, respectively. Aside from pasture grass, mixed grass-clover hay and barley, animals from the second group were also supplied with 500 g d-1 of concentrated feed per head throughout the experiment (4 weeks). This study revealed that improved dietary quality causes significant increases in hematological parameters and immunoglobulin levels. The results showed that the hematocrit levels, mean corpuscular volumes, and mean corpuscular hemoglobin concentration values of group 2 were higher than those of the other groups (P<0.05 for hematocrit; P<0.01 for other comparisons). The diets enriched with the concentrated feed increased the immunoglobulin A, immunoglobulin G, immunoglobulin E, and immunoglobulin M levels in sheep compared with levels in the control group (P<0.01). Improvements in these values will reduce the risk of disease in animals and naturally increase their productivity.
Heat Stress in Ruminants
(Univ Agricultural Sciences & veterinary Medicine Bucharest, 2017) Sireli, Halit Deniz; Tutkun, Muhittin; Tatar, Ali Murat; Tuncer, Selcuk Seckin
Heat stress is one of the most important environmental stressors that reduce productivity in animal breeding. The productivity of farm animals is significantly reduced due to temperature increases. As a result, significant economic losses occur during the summer months. Temperature humidity index developed according to air temperature and relative humidity relation is a widely used method for determining the effect of heat stress for domesticated animals. The ruminants entering the heat stress have lower feed consumption and consequently lower yields. This review was conducted to determine the effects of negative stressors on ruminants, to show how to reduce the effects of these factors, and to determine what the physiological changes due to temperature stress are.