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Articles by S. Tabatabaei
Total Records ( 10 ) for S. Tabatabaei
  S. Tabatabaei , M. Chaji and T. Mohammadabadi
  The goal of present study was to evaluate the effect of Indigenous broiler breeder rooster age on some of the semen quality parameters. For this research, 15 Indigenous broiler breeder Roosters were classified in three treatment groups according their ages: 26, 34 and 45 weeks and evaluation of semen repeated 4 times for each group. Semen was collected from all roosters by abdominal massage method. After dilution, semen samples were examined microscopically for quality parameters (concentration, motility, viability and morphological defect rates of spermatozoa). The difference of spermatozoa concentration between 26 and 34 weeks roosters was not significant; but sperm concentration reduced significantly in 45 weeks roosters. Sperm motility and viability rates reduced significantly with ageing of roosters. Morphological defect rates of spermatozoa. Morphological defect rates of spermatozoa increased significantly with ageing of roosters. Among observed morphological defects, Larger head, smaller head and 180° bent head, increased significantly with ageing of roosters. While, tail knotting and 180° bent tail decreased significantly with ageing of roosters. The differences of other defects between groups were not significant. It is concluded that concentration, motility and viability rates of spermatozoa in indigenous broiler breeder roosters reduced with increasing the age from 26-45 weeks. While in this period, morphological defect rates of spermatozoa increased. Therefore, present study confirmed that semen quality reduced with ageing of indigenous broiler breeder roosters.
  T. Mohammadabadi , M. Chaji and S. Tabatabaei
  The aim of this study was to investigate the effect Tannic Acid (TA, 20 and 30 g kg-1 DM) on in vitro gas production and rumen fermentation of low and high fat sunflower meal (25 and 165 g kg-1 DM, respectively). Kinetics of gas production was fitted to an exponential model. The results showed that tannic acid caused to reduce the fermentable fraction (b) and gas production rate constant for the insoluble fraction (c) (p<0.05) and the lowest (b) and (c) was for low fat Sunflower Meal (SML) treated by 30 g kg-1 DM TA (102.5 and 0.01 mL h-1, respectively). The Organic Matter Digestibility (OMD) and Metabolizable Energy (ME) were decreased by TA treatments. Untreated SML had the highest ME and OMD (29.4 MJ kg-1 DM, 185.6 g kg-1 OM, respectively).The ammonia-N (NH3-N) concentrations and Short Chain Fatty Acid (SCFA) decreased (p<0.05) when SM treated with TA. Content of NH3-N was lowest for SML treated 30 g kg-1 DM TA (12.3 mg dL-1). Untreated sunflower meal had the lowest SCFA concentration and the highest Microbial Biomass (MB). The results showed, it may be that in vitro fermentation, gas production parameters and nutritive value of sunflower meal are influenced by tannic acid content.
  M. Nazari , M.T. Beigi Nassiri , J. Fayazi and S. Tabatabaei
  In order to estimate variance components 8843 test day milk and fat yields records from first lactation Najdi cattle were used. Data obtained between years of 1989-2005 by animal breeding station of Najdi cattle located in Shooshtar city. Random regression models were studied in respect of different orders of fitting for fixed and random regression. Also, different methods of residual variance in the statistical model assume that included assumption of constant residual variance and different assumption about variable residual variance during lactation. According to the obtained results, the assumption of heterogeneous residual variance during lactation improved characteristics of statistical model. A suitable model with (3, 3) orders of fit for additive genetic and permanent environmental covariance functions to analyze TD fat and milk yield records were recognized. Minimum of heritability for fat and milk yield was estimated at the beginning of lactation (0.1, 0.15), respectively. The amount of this parameter increased to mid lactation and almost in the 5th month of lactation reached to maximum level (0.34 for milk yield and 0.44 for fat yield), then decreased to the end of lactation.

Key words: Random regression, milk and fat yields, Najdi cattle, residual variance, Iran

  M. Chaji , T. Mohammadabadi , M. Mamouei and S. Tabatabaei
  This trial was conducted to determine the effect of high steam (180-210 °C, 3 min) and sodium Hydroxide (NaOH) on fermentative activity and nutritive value of sugarcane pith by in vitro gas production. Experimental samples were including; untreated sugarcane pith, treated with high steam, treated with 50 g kg -1 DM NaOH and treated with steam + NaOH. The results showed sugarcane pith treated with steam + NaOH have the highest potential gas production (B) (143.5 mL). High steam and NaOH caused to increase in vitro cell wall degradation, Organic Matter Digestibility (OMD), Metabolisable Energy (ME) and Short Chain Fatty Acid (SCFA) of sugarcane pith and the highest was for sugarcane pith treated with steam+NaOH (87%, 703.26 g kg -1 OM, 10.03 MJ kg -1 DM and 0.96 μmol L -1, respectively). Therefore, it appears that the degradability and nutritive value of sugarcane pith are influenced by high steam and NaOH.
  A. Aghaei , S. Tabatabaei and M. Nazari
  The aim of this study was to evaluate the correlation between cooper, zinc, calcium, sodium and potassium concentration of seminal plasma and spermatozoa progressive motility percent in rooster. Seventeen Indigenous broiler breeder Roosters were used. According to spermatozoa motility, roosters were classified to 3 treatment groups with low, medium and high progressive motility percent. Seminal plasma from all groups was obtained with centrifuge of semen samples. Cooper, Zinc, Sodium, potassium and calcium concentrations in seminal plasma samples were determined on the atomic absorption spectrophotometer. There was positive correlation between cooper and zinc concentrations of seminal plasma and progressive motility percent of spermatozoa. There was no significant correlation between sodium concentrations of seminal plasma and progressive motility percent of spermatozoa. There was negative correlation between low/medium progressive motility rate groups and high motility group. While this correlation for calcium concentration was positive.
  M. Nazari , Jamal Fayazi , S. Tabatabaei , A. Aghaei and Morteza Mamoei
  The main objective of this study was to estimate genetic and phenotypic potential of milk yield, fat yield and fat percentage traits. Data analyzed were 3350 records from buffalo during 1989-2008 were collected. Co-variance components were estimated using uni and multiple traits of animal model with the Restricted Maximum Likelihood method. In this method with constant effects of season-city-year and lactation period and additive genetic was taking as Random effect. The mean and standard deviation for milk yield, fat yield and fat percentage were 964.14±18.28, 52.35±1.88 and 5.58±0.03, respectively. The heritability of milk yield, fat yield and fat percentage were 0.22, 0.18 and 0.13, respectively using univariate model. The repeatability of milk yield, fat yield and fat percentage were 0.55, 0.41 and 0.39, respectively using univariate model. The genetic and phenotypic correlation between milk yield-fat percentage, milk yield-fat yield, fat yield-fat percentage was -0.25 and -0.30, 0.75 and 0.25, 0.29 and 0.41, respectively. The heritability for milk yield trait was moderate, so selection on the basis of this trait may cause a desirable genetic gain.
  S. Tabatabaei
  The purpose of this study was to evaluate tshe optimum number of spermatozoa for highest fertility in Ross-308 broiler breeder chicken. About 24 Ross hens in 4 treatment groups were used. Semen was collected from 8 Ross roosters by abdominal massage and pooled in glass tube. After initially dilution with modified Ringer’s solution and determination the spermatozoa concentration by hemocytometer, the semen was diluted further. About 50, 75, 100 and 150 million spermatozoa in 0.1 mL were inseminated to treatment groups for 4 weeks (4 times repeating). Eggs were collected daily from the 2nd day post insemination and incubated. After 7 days of incubation, the eggs were candled for fertility rate. In treatment groups that were inseminated with 50, 75, 100 and 150 million spermatozoa, fertility rates were 52.85±4.15, 72.37±5.28, 87.64±4.81 and 89.12±3.74%, respectively. As shown to this results, fertility rate in treatment group that was inseminated with 50 million spermatozoa was lowest (52.85±4.15%) and then increased significantly (p<0.05) with increasing the sperm number and reached to maximum in treatment group that was inseminated with 100 million spermatozoa (87.64±4.81%). Difference of fertility rate between treatment groups that were inseminated with 100 and 150 million spermatozoa (87.64±4.81 and 89.12±3.74%, respectively) was not significant (p>0.05). It is concluded that optimum dose of spermatozoa for artificial insemination in Ross-308 chicken was 100 million sperm.
  A. Aghaei , S. Tabatabaei , M. Chaji and M. Nazari
  This study was conducted to evaluate the effects of adding levels of dried whey powder and probiotic to practical-type diets on the performance and Intestinal micro organism of laying hen’s. Dried whey was used in isocaloric and isonitrogenous diets at levels of 0, 2.5, 5 and 7.5% with two Level of probiotic (0 and 1000 g-1 Bioplus 2B ton-1 feed providing 0 and 3.2x106 cfu g-1 Feed concentration). About 72 white leghorn Hy-Line, w-36 strain used in experiment. Adding dried whey powder and probiotic to the diets caused highly significant increase (p<0.05) in egg production and lactobacillus in ileum but significant decrease (p<0.05) coliform in ileum. Using dried whey and probiobic improve egg weight, egg mass, shell thickness, shell hardness and Haugh unit but not significant (p>0.05). Level of 5% dried whey had significant decrease feed conversion (p<0.05). Other traits did not show significant different by using dried whey and probiotic.
  Kh. Mirzadeh , S. Tabatabaei , M. Bojarpour and M. Mamoei
  The aim of this study was comparison of hematological parameters according strain, physiological status, age, season and sex in cattle. Blood samples from 300 Holstein, Brown-swiss, Semental, Brown-swiss x Semental crossbreed and Brown-swiss x Holstein crossbreed cattle at different physiological status (dairy cows, dried cows, non pregnant cows, pregnant heifers, suckling and non suckling calf), age (0.5-3, 3.5-6, 6.5-9, 9.5-18, 18.5-36, 36.5-60 and >60 months) sex (male and female) and season (spring, summer, autumn and winter) were used. RBC mass, WBC mass, Hemoglobin concentrations (HB), PCV, MCV, MCHC, MCH, platelet mass, percent and concentration of lymphocyte, neutrophil, eosinophil and monocyte were determined with routine methods. Except for PCV, neutrophil, lymphocyte, eosinophil percents and neutrophil-lymphocyte ratio, there was not significant differences for other hematological parameters between strains. Except for Platelet concentration, monocyte percent and count, the other hematological parameters were significantly differ between various physiological status and ages of cattle. Except for Hb, PL, WBC and monocyte concentration, the other hematological parameters were significantly differ between sexes. Except for neutrophil concentration, monocyte percent and concentration, the other hematological parameters were significantly differ between seasons.
  H. Albomohsen , M. Mamouei , S. Tabatabaei and J. Fayazi
  Metabolic changes in blood serum may be reflected in the biochemical composition of follicular fluid and can be indirectly influenced oocyte quality. The purpose of this study was to investigation metabolite composition variations of follicular fluid and blood serum in Iranian dromedary camels during the peak breeding season (October-march). Following slaughter, blood samples were collected from 50 female camels and follicular fluid aspirated from small (5-9 mm) and large (10-20 mm) follicles were analyzed for various metabolite concentrations, using the commercial kits.
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