Serkan Erat - Academia.edu (original) (raw)

Papers by Serkan Erat

The aim of this study was to determine oxidant-antioxidant status by evaluating some oxidative st... more The aim of this study was to determine oxidant-antioxidant status by evaluating some oxidative stress parameters (nitric oxide (NO), malondialdehyde (MDA), total antioxidant status (TAS), total oxidant status (TOS), catalase activity) in clinically healthy Akkaraman ewes with seropositive for Schmallenberg virus (SBV). The study consisted of four positive, six suspected and seven negative-control blood sera in terms of specific antibody for SBV by using commercial ELISA kits. Even though there were no significant statistical differences (P>0.05), the highest NO level was in sera with SBV specific antibody positive while the lowest TOS level was in sera with SBV specific antibody negative. The values of TAS in sera were very similar in the groups (P=0.981). While the MDA levels of sera with SBV specific antibody positive and suspected were similar, the statistical difference was found between the MDA level of sera with SBV specific antibody positive and negative (P=0.021). The cat...

This study was carried out to compare the number of honeycombs with full of bees (wax building ac... more This study was carried out to compare the number of honeycombs with full of bees (wax building activity) (frame count), survivability, swarm condition and honey yield for the thermo plastic (plastic) and wooden Langstroth honey bee hives. A total of 23 hives (10 plastic and 13 wooden hives) were used. The mean frame count for the plastic and wooden hives, respectively, were 13.25±0.28 and 14.77±0.48 (Z= -1.24, p=0.22). Survivability rates for the plastic and wooden hives, respectively, were 90.00% and 53.85% for at the end of first year (Fisher’s exact test p=0.089) and 30.00% and 15.38% (Fisher’s exact test, p=0.618) for at the end of the study. The plastic hives decreased the death incidence at the end of the study [relative risk ratio (RR)=0.82]. Swarm rates were 40.00% and 15.38% (Fisher’s exact test p=0.341) for the plastic and wooden hives, respectively at the end of first year. Swarm condition increased about 3 times more in the plastic hives as compared to the wooden hives (...

Pakistan Journal of Zoology, 2015

In the present study, the simple regression analysis using the different morphometric measurement... more In the present study, the simple regression analysis using the different morphometric measurements of hares was performed for the estimation of body weight of brown hares (Lepus europaeus) from Anatolia (juveniles versus adults). There was a strong linear relationship between body weight (BW) and ear length (EL) and condylobasal length (CBL) in juvenile Anatolian hares. On the other hand, there was a medium linear relationship between BW and tail length (TL) and CBL in adult Anatolian hares. The prediction models determined explained 94% and 41% of the variation in BW of juvenile and adult Anatolian hares, respectively. The BW showed the highest correlation coefficient value with the CBL (r = 0.964; p < 0.01) in the juvenile hares. Similarly, the BW showed the highest correlation coefficient value with the CBL (r = 0.582; p < 0.01) in the adult hares. Our study revealed that juvenile Anatolian hares presented a greater variability than did adults Anatolian hares with respect t...

Pathogens, 2021

Domestic felines’ re-emerging infectious and neglected zoonotic diseases are a significant focus ... more Domestic felines’ re-emerging infectious and neglected zoonotic diseases are a significant focus of global “One Health” efforts. This study aimed to rapidly diagnose 14 pathogens, including zoonoses by using PCR primers in 167 client-owned symptomatic cats, routinely accepted to the Veterinary Clinics of Tekirdag. The prevalence of pathogens investigated were as follows: Babesia canis canis (24%), Babesia microti (2.4%), Hepatozoon felis (10.8%), Cytauxzoon felis (6.6%), Bartonella henselae (40.1%), Anaplasma platys (30.5%), Anaplasma phagocytophilum (7.2%), Rickettsia felis (26.3%), Borrelia burgdorferi (21%), and hemotropic Mycoplasma sp. (11.4%). There was a significant difference between the prevalence of the pathogens (χ2 = 152.26, df = 9, p < 0.001). There was also a statistical difference between the gender of the cats in terms of the prevalence of all pathogens considered together (χ2 = 4.80, df = 1, p = 0.028), where the female cats showed a higher prevalence. This was n...

TURKISH JOURNAL OF VETERINARY AND ANIMAL SCIENCES, 2014

Least-Squares Means and Stancfard Errors for Litter Size at Birth (LSB), Litter Size at Weaning (... more Least-Squares Means and Stancfard Errors for Litter Size at Birth (LSB), Litter Size at Weaning (LSW) and Litter Viability to Weaning (LVW) by Interaction Ewe Breeds vs Year of Birth vs Age of Dam (EWEBR-VR*AOD) '" 44 12. Analysis of Variance for Hot Carcass Weight (HCW)•, Adjusted Fat Thickness (ADJFATt)b, Dressing Percentage (DP)C, Ribeye Area (REA)~and Leg Conformation (LEG)8 '". 46

Ankara Üniversitesi Veteriner Fakültesi Dergisi, 2017

Özet: Avrupa'da 2011 yılında ruminantları etkileyen yeni bir virüs belirlenmiştir. Schmallenberg ... more Özet: Avrupa'da 2011 yılında ruminantları etkileyen yeni bir virüs belirlenmiştir. Schmallenberg olarak isimlendirilen bu virüsün Türkiye'deki yaygınlığı üzerine yapılan çalışmalar oldukça sınırlı sayıdadır. Bu çalışmada; koyun yetiştiriciliğinde büyük ekonomik kayıplara neden olan Schmallenberg virüsün (SBV) seroprevalansı ve Culicoides'lerle nakledilmesinden dolayı bazı coğrafi özellikler (rakım, büyük su kaynaklarına yakın olması) ile seroprevalans arası ilişkinin araştırılması amaçlanmıştır. Bu amaçla, Kırıkkale merkez ve ilçelerinde, 684 ile 1219 m arası rakımda bulunan, 38 koyun sürüsündeki 1038 hayvandan (969 koyun, 69 koç) kan serum örneği alınarak ticari ELISA kiti ile SBV özgül antikorları yönünden değerlendirilmiştir. Çalışmaya alınan hayvanların yaşları ≥2-<4 (n=517), ≥4-<6 (n=474), ≥6 (n=47) olarak gruplandırılmıştır. Örneklenen hayvanların %0.38'i (4/1038) pozitif, %0.57'si (6/1038) şüpheli olarak değerlendirilmiştir. SBV antikorları yönünden pozitif olarak belirlenen dört hayvanın birinin koç, üçünün koyun; şüpheli olarak değerlendirilen altı hayvanın ise birinin koç, beşinin koyun olduğu belirlenmiştir. Pozitif ve şüpheli olarak belirlenen hayvanların bulunduğu sürülerin belli bir rakımda yoğunlaşmadığı ve bu sürülerin yarısının büyük su kaynaklarına yakın olmadığı tespit edilmiştir. SBV yönünden pozitif örnek sayısı az olduğu için seroprevalansı ile yaş grupları, cinsiyet ve bazı coğrafi özellikler arasındaki ilişki istatistiksel olarak değerlendirilmemiştir. Kırıkkale'de yetiştirilen koyunlarda, SBV seroprevalansının araştırıldığı bu çalışma ile enfeksiyonun varlığı ilk kez ortaya konulmuş olup, abortus/anomalili yavru doğumları gözlenen sürülerde, söz konusu enfeksiyonun da araştırılmasının uygun olabileceği kanısına varılmıştır. Anahtar sözcükler: Coğrafi özellikler, Kırıkkale, koyun, Schmallenberg virüs, seroprevalans. Seroprevalance of Schmallenberg virus and its relationship with some geographical features in sheep reared in Kirikkale* Summary: A virus, which effects ruminants, was firstly described in 2011 in Europe. There are limited information about this virus called Schmallenberg in Turkey. The aim of the present study was to determine the seroprevalance of Schmallenberg virus (SBV), which may cause major economic losses to sheep, and the association between seroprevalance and some geographical features (e.g. altitude, near a large water source) because of transmission by Culicoides spp. Blood samples from 1038 animals (969 ewes, 69 rams) in 38 flocks were collected and evaluated with a commercial ELISA kit in terms of specific antibody for SBV in centrum and eight towns of Kirikkale, where the altitudes ranges from 684 to 1219 meters. Age groups of the animals were determined as ≥2-<4 (n= 517), ≥4-<6 (n= 474) and ≥6 (n= 47) years old. The samples of Schmallenberg virus specific antibody detected as positive and suspected were 0.38% (4/1038) and 0.57% (6/1038), respectively. One out of four Schmallenberg virus specific antibody positive animals was ram, the others were ewes. On the other hand, one out of six Schmallenberg virus specific antibody suspected animals was ram, the others were ewes. The flocks of the animals with the virus specific antibody positive and suspected animals were not in places with the certain altitudes and the half of those flocks were not close to large water sources. Due to the limited numbers of animals with the virus specific antibody positive, no statistical analysis were performed to see the association between the seroprevalance of the virus and gender, age of the animals and the geographical features of the places. This study that is first investigation about Schmallenberg virus seroprevalence in sheep in Kirikkale, showed the presence of the virus specific antibody. It was also thought that this virus should be considered as the cause of abortion and malformed births in flocks.

fspublishers.org

The aims of this study were to predict body weight (BW) from different body measurements and to d... more The aims of this study were to predict body weight (BW) from different body measurements and to determine the best regression model for domestic cats. For this aims, a total of 48 adult Turkish cats (20 females & 8 males Turkish Angora; 13 females & 7 males Turkish Van) were used. In the study, wither height (WH), body length (BL) and head circumference (HC) were assumed as independent variables, whereas body weight was used as dependent variable. Linear, quadratic and cubic effects of the independent variables were included in the assumed model as Y= b 0 + b 1 X + b 2 X 2 + b 3 X 3 + e. Where Y = body weight; b 0 = the intercept; X = independent variables, (WH, BL, or HC); b 1 , b 2 and b 3 = regression coefficients and e = random error. Conceptual predictive (Cp) and Akaike information criterion (AIC) were used to determine the most suitable model among the assumed models. The model that has the smallest Cp and AIC values is the best model. The R 2 values from the regression indicate the BL (R 2 = 0.50) to be moderately related to the BW. Neither the quadratic term nor the cubic term was significant for all body traits, whereas the linear term was highly significant (p < 0.001) for all independent variables. Since the maximum number of independent variables is three, there were seven possible different models. It can be concluded that cat body weight was explained with the following model. (BW) =-4.53 + 0.11 WH + 0.13 BL with p-values, <0.

Turkish Journal of Veterinary & Animal Sciences

Th e primary aim of this study was to determine the hair characteristics of Turkish Angora and Va... more Th e primary aim of this study was to determine the hair characteristics of Turkish Angora and Van cats, and also to see if there were seasonal, sex, age, or eye color eff ects on the traits measured. A total of 41 cats, 26 Turkish Angora and 15 Turkish Van, were used. Th e ages of the cats ranged from 1 to 8 years old. Analyzed traits included fi ber diameter (FD), fi ber lengths of hauteur (H) and barbe (B), fi ber tenacity (T), and elongation (EL). Terms included in the statistical models were breed, season, sex, age, and eye colors of the cats and 2-way interactions that had P-values of less than 0.2 among the main eff ects. Th e diff erence in the FD of the Turkish Angora (23.5 μm) and Van (25.6 μm) cats was not signifi cant (P = 0.0579). Th e H (27.5 versus 20.1 mm), B (33.1 versus 23.4 mm), and EL (33.8% versus 24.0%) values were all greater (P < 0.0001) for the Turkish Angora cats, while only the T value (12.1 versus 7.6 g/den) was greater (P = 0.0001) for the Turkish Van cats. Signifi cant phenotypic correlations were found between FD and T (0.36, P = 0.0191), between H and B (0.98, P < 0.0001), between H and T (-0.58, P < 0.0001), between H and EL (0.31, P = 0.0480), between B and T (-0.56, P = 0.0001), and between B and EL (0.34, P = 0.0315). Th e present study defi nes the hair characteristics of the Turkish Angora and Van cats. Th ese results may help to understand the phenotypes of these cats better and could also be a source for further studies.

The aim of this study was to investigate vaginal cytology, haematological and hormonal values, th... more The aim of this study was to investigate vaginal cytology, haematological and hormonal values, the presence of bacteria in the vagina, and the relationship between these findings in different reproductive periods in cats. The study consisted of 30 healthy non-geriatric female cats that had reachedto puberty. The cats were divided into 3 equal groups (each having 10 cats) as estrus, anestrus and pregnant. The vaginal samples for microbiological and cytological examination andthe blood samples for hormonal analysis and hemogram were taken at the same time. A total of 100 vaginal epithelial cells were counted from the random areas of thevaginal cytology samples on the slide. The distributions of the percentages of the counted cells according to the groups were subtracted and compared. While there was no bacterial growth in 9 (30%) animals, bacterial growth was observed in 21 (70%) animals. There were no bacterial growth in 3 (30%), 4 (40%) and 2 (20%) animals inestrus, pregnant and anestrus groups, respectively. Estradiol (E2) level (42.64 ± 10.62 pg/ml) in estrus animals was significantly higher (P0.001) than E2 level in pregnant and an estrus animals. The progesterone (P4) level of the pregnant group (12.22±9.35 ng/ml) was higher (P0.001) than the P4 levels of the anestrus (0.84±0.25 ng/ml) and the estrus group (0.58±0.28 ng/ml), while the P4 levels of the estrus and the anestrus groups were similar. Significant differences were detected only in MCV, MCH and MCHC, within 19 blood parameters. MCV values were found to be lower in estrus animals (45.68±3.75femtoliter) than only in pregnant (51.21±4.99femtoliter) animals (P=0.007). The difference in MCH values between the estrus group (14.37±0.84 pg) and the pregnant group (15.62 ± 1.18 pg) (P=0.003) and the difference in MCHC values between the pregnant group (30.66±1.17 g/dl) and the anestrus group (32.42±1.04 g/dl) (P<0.001) were statistically significant. The presented results may help in the planning of future studies and the comparison of the obtained values.

Lalahan Hayvancılık Araştırma Enstitüsü Dergisi, Jun 1, 2013

Kocatepe Veterinary Journal, 2022

The present study aimed to compare the growth and the development of Hair and Damascus kids reare... more The present study aimed to compare the growth and the development of Hair and Damascus kids reared under extensive conditions. The body weights of Damascus goats were significantly higher than that of the Hair goats during the 360 days growth period (P < 0.05; P<0.001). Body weight was influenced by birth type only at birth and on the 360th day of the growth period, and single-birth kids had higher values than twin-born kids (P < 0.05). Exceptfor the 120th day of the growth period, the body weight of kids born in dam age group III was higher than that of kids born in the other dam age groups (P < 0.05; P < 0.01; P < 0.001). The breed effect was markedly observed after the 120th day of the growth period concerning body measurements especially chest depth, rump height, and body length. Damascus goats were significantly higher than that in the Hair goats for these traits (P < 0.001). It can be suggested that comparative studies containing the entire growth period should be conducted on other indigenous goat breeds (Angora, Honamlı, Kilis, and Norduz goat breeds) and to demonstrate the growth and development characteristics of these breeds.

The objectives of the present study were to gather data on the prenatal development of Turkish ca... more The objectives of the present study were to gather data on the prenatal development of Turkish cats (the Angora and Van cats) and examine the effects of the breed on prenatal development. Three Angora and four Van cats, ranging in age from 3 to 4 years, were used in the present study. Depending on the stage of pregnancy, the gestational sac diameter (GSD), the fetal heart diameter (FHRTD), the fetal abdominal diameter (FAD), the fetal head diameter (FHD), the fetal gastric diameter (FGD), the fetal width of fore (FWFP) and rear footpads (FWRP) were measured by freezing the images of the fetus or fetal structure on the screen. The mean FHRTD value of the Angora cats was significantly (P = 0.033) greater than the corresponding value of the Van cats during the third week of gestation. The Van cats had significantly (P = 0.008) greater mean value of FHD than did the Angora cats during the fifth week of the gestation. There were no significant breed differences between the other fetal me...

The objectives of this study were to evaluate the effects of substituting barley with potato pulp... more The objectives of this study were to evaluate the effects of substituting barley with potato pulp silage prepared with ground barley straw and wheat bran on fattening performance of fatty tailed Akkaraman and long tailed Kıvırcık x Akkaraman (B1) crossbreed lambs. In this study,two different diets were prepared iso-caloric and iso-nitrogenous. Control group based on barleys diet and experimental group based on potato pulp which is includes 10 % of dry matter content of barley diets. In this trial, 28 Akkaraman lambs and 52 Kıvırcık x Akkaraman (B1) cross-breed lambs totaly 80 lambs were used. Average live weight of animals 30.20 and 27.00 kg respectively. Age of animals were 6-7 mounth old. Akkaraman and Kıvırcık x Akkaraman (B1) cross-breed lambs were seperated into 2 groups randomly, when study started all lambs had similar live weight and all lambs were fed both 2 diets throughout 55 days. Daily feed consumption of animals were measured biweekly and dry matter intake of lambs wer...

Bu calisma, rasyona arpa yerine saman ve kepek ile hazirlanmis patates posasi silaji katilmasinin... more Bu calisma, rasyona arpa yerine saman ve kepek ile hazirlanmis patates posasi silaji katilmasinin yagli kuyruklu Akkaraman ve ince kuyruklu Kivircik x Akkaraman (G1) melezi kuzularda besi performansi uzerine etkilerini belirlemek amaciyla yapilmistir. Denemede, izonitrojenik ve izokalorik iki farkli rasyon hazirlanmistir. Kontrol grubu (arpa bazli), deneme grubu ise rasyondaki arpa miktarinin KM bazinda %10’u kadar patates posasi silaji (patates posasi silaji bazli) iceren rasyondan olusmaktadir. Calismada ortalama canli agirliklari sirasiyla 30.20 ve 27.00 kg olan 6-7 aylik yasta 28 Akkaraman, 52 Kivircik x Akkaraman (G1) erkek kuzu olmak uzere toplam 80 bas kuzu kullanilmistir. Akkaraman ve Kivircik x Akkaraman (G1) melezi kuzular baslangic canli agirliklari esit olacak sekilde rastgele iki gruba dagitilmislar ve farkli 2 rasyonla 55 gun boyunca beslenmislerdir. Gunluk yem tuketimleri her iki haftada bir belirlenerek kuru madde bazinda esit tutulmustur. Kuzularin canli agirlik art...

Bu çalışma Kangal köpeklerinde bazı biyokimyasal parametreler üzerine yaş ve cinsiyetin etkilerin... more Bu çalışma Kangal köpeklerinde bazı biyokimyasal parametreler üzerine yaş ve cinsiyetin etkilerini belirlemek amacıyla gerçekleştirilmiştir. Çalışmada 40 ergin (1-10 yaş, 20 erkek ve 20 dişi) ve 32 genç (1-11 aylık, 12 erkek ve 20 dişi) olmak üzere toplam 72 sağlıklı Kangal köpeğinden alınan kan örneklerinin plazmalarında alanin aminotransferaz (ALT), γ-glutamil transpeptidaz (GGT) aktiviteleri, total kolesterol, total bilirubin, üre, total protein, albumin ve globulin düzeyleri belirlenmiştir. Ergin erkek köpeklere göre genç erkeklerde plazma total kolesterol düzeyi yüksek (p<0.05), total protein ve globulin düzeyleri ise düşük (p<0.01) bulunmuştur. Ergin dişi köpeklerde plazma GGT aktivitesi, total protein ve globulin düzeylerinin genç dişilere göre daha yüksek (p<0.05) olduğu, total kolesterol (p<0.01) ve total bilirubin (p<0.05) düzeylerinin ise düşük olduğu saptanmıştır. Cinsiyet dikkate alındığında ise, genç köpeklerde plazma GGT aktivitesi ve albumin düzeyinin, ergin köpeklerde de total protein ve albumin seviyelerinin erkek köpeklerde dişi köpeklerden daha yüksek olduğu tespit edilmiştir (p<0.05). Sonuç olarak, çalışmada elde edilen veriler, ülkemiz için genetik bir kaynak olan Kangal köpeklerinin bazı biyokimyasal parametrelerinin yaş ve cinsiyetten etkilendiğini göstermiştir. Ayrıca Kangal ırkına ait bazı biyokimyasal değerlere ait referans aralıklarının yaş ve cinsiyete göre belirlenmesiyle, hem klinisyenlere hem de Kangal köpekleriyle araştırma yapanlara katkı sağlayabileceği düşünülmektedir.

Bu arastirmanin amaci Kil ve Halep kecilerinde elyaf kalite ozelliklerinin belirlenmesidir. Arast... more Bu arastirmanin amaci Kil ve Halep kecilerinde elyaf kalite ozelliklerinin belirlenmesidir. Arastirmanin hayvan materyalini Kirikkale ilinde yetistirilen 12 aylik yastaki 12 bas Halep kecisi (6 erkek, 6 disi) ve 12 bas kil kecisi (6 erkek, 6 disi) olusturmustur. Kil ve Halep kecilerinde elyaf kalite ozelliklerinin belirlenmesi amaciyla 24 kecinin uc ayri vucut bolgesinden (omuz, kaburga ve sagri) toplam 72 adet ornek alinmistir. Her iki irkta, tiftikte kalite analizleri (elyaf uzunlugu, elyaf capi, mukavemet, elastikiyet ve randiman), Uluslararasi Hayvancilik Arastirma ve Egitim Merkezi Mudurlugu yapagi ve tiftik laboratuvarina yaptirilmistir. Halep ve Kil kecilerinde uzunluk (barbe), elyaf capi, mukavemet, elastikiyet ve randiman ozelliklerine ait en kucuk kareler ortalamalari sirasiyla 70.92 ve 54.98 mm, 66.37 ve 65.94 µm, % 28.62 ve 26.60, 12.58 ve 11.97 cN/ tex, % 91.09 ve % 89.76 olarak belirlenmistir. Irk farkliliginin elyaf capi, mukavemet, elastikiyet ve randiman uzerine et...