Mansoura University, Faculty of AgricultureJournal of Animal and Poultry Production2090-364211120101101EFFECT OF ZINC SULFATE AND / OR MANGANESE SULFATE SUPPLEMENTATION ON FRIESIAN CALVES PERFORMANCE .5755888627010.21608/jappmu.2010.86270ENH. M.EL-NahasAnimal Production Res. Inst., Agric. Res. Center, Ministry of Agric. , Giza. Egypt.Journal Article20200501This study was conducted to investigate the effect of supplementation of zinc sulfate and / or manganese sulfate on the digestibility and ruminal activity, some blood parameters and productive performance of Friesian calves . Twenty calves with <strong>in</strong>itial body weightof 262±.7kg in a 180 days experiment were chosen and divided into four similar groups (5 calves each). The control group was fed on concentrate feed mixture (CFM) + berseem hay (BH) + rice straw (RS), while 1<sup>st</sup> tested group was fed on the control ration + 40 mg zinc sulfate(ZnSO<sub>4</sub>) / kg DMI, the 2<sup>nd</sup> tested group was fed on the control ration + 40 mg manganese sulfate (MnSO<sub>4</sub>) / kg DMI of and the 3<sup>rd</sup> tested group was fed on the control ration + (40 mg ZnSO<sub>4</sub>+40 mg MnSO<sub>4</sub>)/kg DMI . Adding either zinc sulfate or manganese sulfate or mixture of both elements increased (P<0.05) the nutrients digestibility and in turn the nutritive values (TDN and DCP). Adding zinc sulfate or manganese sulfate reduced ammonia-N and increased TVFA's . With respect to blood parameter, rations supplemented with Zinc or Mn sulfate appeared to higher total protein, albumine and lower globuline and urea concentration. Daily gain of the animals fed supplemented rations (tested groups) were higher than that of the control group being 0.969, 0.883 and 1.037 kg for animals fed rations supplemented with Zn , Mn and both of Zn plus Mn sulfate, respectively. Consequently, feed efficiency was better for tested groups which was give more gain with less feed intake and lower feed cost.
It could be concluded that addition of 40 mg zinc sulfate and / or manganese sulfate/kg DMI improved nutrients digestibility, economic efficiency and daily gain of Friesian calves.Mansoura University, Faculty of AgricultureJournal of Animal and Poultry Production2090-364211120101101EFFECT OF ZINC OR/AND MANGANESE METHIONINE SUPPLEMENTS ON PERFORMANCE OF LACTATING BUFFALOES .5896028627110.21608/jappmu.2010.86271ENI. M.E.ShakweerAnimal Production Research Institute, Agric. Res. CenterG. M.MustafaFaculty of Agriculture, Fayoum University.G. A.AhmedFaculty of Agriculture, Fayoum University.M. I.N.IsmailAnimal Production Research Institute, Agric. Res. CenterJournal Article20200501This study was conducted to investigate the effect of adding chelated zinc methionine or / and manganese methionine on the digestibility coefficients, nutritive value, some ruminal and blood parameters, milk yield and composition of lactating buffaloes.<strong>.</strong> Sixteen lactating buffaloes at the last three months of pregnancy were divided into four similar groups . Animals were fed according to Ghoneim (1964) Feeding standard. The lactating buffaloes were fed on the following rations: The control group was fed concentrate feed mixture, berseem hay (<em>Trifolium alexandrinum</em>) and rice straw without minerals supplementation. .The 1<sup>st</sup> tested group was fed the control ration + 40mg zinc methionine /kg DMI). The 2<sup>nd</sup> tested group was fed control ration + 40mg manganese methionine /kg DMI). The 3<sup>rd</sup> group was fed the control ration + 40mg zinc methionine + 40mg manganese methionine /kg DMI). All groups were fed from about three months before the expected calving date up to 105 days of lactation . Results indicated that the addition of both chelated zinc and manganese methionine improved DM, OM, CP, CF, EE and NFE digestibilities and feeding values ( TDN and DCP) . Also , chelated zinc , manganese and zinc plus manganese supplements tended to reduce ammonia –N ,but increase TVFA’s , improved feed conversion and increase milk yield. Moreover, chelated zinc methionine and manganese methionine supplementation increase serum total protein, albumin and globulin, but reduced the concentration of urea in blood serum. From the obtained results. It could be concluded that Zn-Met plus Mn-Met supplementation could be economically and successfully used for lactating buffaloes to improve digestibility’s, feeding values, feed efficiency, milk production and economical efficiency .Mansoura University, Faculty of AgricultureJournal of Animal and Poultry Production2090-364211120101101COMPARISON BETWEEN SIRE AND ANIMAL MODEL TO ESTIMATE GENETIC (CO)VARIANCES FOR MILK YIELD TRAITS6036128627310.21608/jappmu.2010.86273ENH GEl-AwadyAnimal Production Dept., Fac. of Agriculture, Kafrelsheikh University, PC: 33516, Kafrelsheikh, Egypt,Zainab A.KhalifaAnimal Production Res. Inst., Ministry of Agric., Dokki, Giza, EgyptA. S.KhattabAnimal Production Department, Faculty of Agriculture, Tanta university EgyptE. Z. MOudahDepartment of Animal Production, Faculty of Agriculture, Mansoura University, PC: 35516, Al Mansoura, Egypt.Journal Article20200501Records of 847 Friesian cows which completed one or more lactations of milk production kept at Sakha and El–Karda farms during the period from 1996 to 2002 were used to estimate the genetic and phenotypic (co)variances of and between three months and 305 day milk yield traits by using sire and animal model. Sire model, included the fixed effects of HYS and parity, Days open was used as a covariate, while the random effects were sire, cow and dam and residual effect. Animal model included the same effects in the sire model and increase the animal direct genetic effect and permanent environmental effect as the random effects. The average number of mixed model equations (MME), no. of iterations, CPU for solving and inverting and AG-Log Likelihood were higher for multi trait than single trait for both sire and animal model. Estimates of heritability (h<sup>2</sup>) of milk traits, for sire model were moderate, ranged from 0.096 to 0.276 for single trait and from 0.116 to 0.264 for multiple traits. While the h<sup>2</sup> for milk traits from animal models ranged from 0.001 to 0.031 for single trait and from 0.046 to 0.062 for multiple traits. Heritability estimates for milk traits in single and multiple traits from both sire and animal model were nearly similar. Genetic correlations between yield traits were positive, high and near similar for both sire and animal model and ranged from 0.88 to 0.99. The high estimates of genetic correlation in the present study offer the possibility to select for yield traits as early ages, .i.e., at 90 days of lactation. Also, this study indicate that, using of sire model is useful when, small number of observation and little pedigree informationMansoura University, Faculty of AgricultureJournal of Animal and Poultry Production2090-364211120101101RELATIONSHIPS BETWEEN THE BROOD STOCKS AGE, SIZES (WEIGHT AND LENGTH) AND FIRST FISH MATURATION FOR BOTH MALES AND FEMALES OF EUROPEAN SEA BASS, Dicentrarchus labrax (L.).6136268627410.21608/jappmu.2010.86274ENN. F.Abd El-HakimFaculty of Agriculture, AI-Azhar University, Nasr City, Cairo, Egypt.M. S.HusseinFaculty of Agriculture, AI-Azhar University, Nasr City, Cairo, Egypt.A. A. H.ShahenThe General Authority for Fish Resources Development , Nasr City, Cairo, Egypt.Journal Article20200501 The objectives of this study aimed to evaluate the relationships between the brood stocks age, sizes (weight and length) and first fish maturation for both males and females of European sea bass <em>Dicentrarchus labrax </em>(L.).
The present study was carried out in the Marine Fish Hatchery belonging to the General Authority for Fish Resources Development (GAFRD), Ministry of Agriculture and Land Reclamation, ARE. The hatchery located at the 21<sup>th</sup> km western of Alexandria at the road from Alexandrian to Matruh governorate. The study was performed during May 2001 to December 2004. For this experiment a total number of 300 of developed sea bass juveniles aging three months were involved. Averages of sea bass weights and lengths at the experimental start were 7.8 ± 2.6g and 4.5± 1.2cm, respectively. The present study aimed to determine the age, weight and<br /> length of sea bass<em>(D. labrax</em>L.)at first sexual maturity.
<strong>The obtained results are summarized in the following:</strong>
1. The first mature males (13.7 % of the fish sample) were detected at 12months, while in females it was detected at 15 months of age (3.3 % of the sample).
2. Percent of mature males and females in the sample increased in almost linear manner with each advance in age to become fully mature in the sample at 36 months of age with a total weight range of 678.9 to 995.8 g for males and 853.6 to 1142.3 g for females.
3. Age appeared significant effects on body weights and lengths in both male and female sea bass where both measurements increased with each advance in age.
4. Starting with the age of 12 months, percent of mature males and females in the sample increased with each advance in age to reach 100% maturation at 36 months of age.
5. The correlation coefficients calculated between age and each of total body weight, body total length and percent of maturation were significant.
The study clearly indicated that the first mature males (13.7 % the sample) were detected at 12 months of age with the average of total weight between 109.6-150g, and the average of total length between 18.4-21cm, while in females it was detected at 15 months (3.3 % of the sample) and the average of total weight was 291.2 g, and the average of total length was 33.6cm. The complete sexual maturity of female occurred at 36 months of age at body weight ranging from 678.9 to 995.8g and, which the total length was 38.2 to 60.6.4cm, in males at the same age and average body weights ranging from 853.6to 1142.3 g with the total length was 43.2 to 68.5cm. The sea bass male and female fish reached 100% maturation with a sex ratio to 1:1.1 for female and male, respectively.Mansoura University, Faculty of AgricultureJournal of Animal and Poultry Production2090-364211120101101RELATIONSHIPS BETWEEN THE BROOD STOCKS AGE AND SIZES (WEIGHT AND LENGTH)AND THE FIRST FISH MATURATION FOR BOTH MALES AND FEMALES OF GILTHEAD SEA BREAM, Sparus aurata (L.)6276398627610.21608/jappmu.2010.86276ENN. F.Abd El-HakimFaculty of Agriculture, Al-Azhar University, Nasr City, Cairo, Egypt.M. S.HusseinFaculty of Agriculture, Al-Azhar University, Nasr City, Cairo, Egypt.A. A. H.ShahenThe General Authority for Fish Resources Development, Nasr City, Cairo, Egypt.Journal Article20200501The objectives of this study aimed to evaluate the relationships between the brood stocks age and sizes ( weight and length) and the first fish maturation for both males and females of gilthead sea bream , <em>Sparus aurata </em>(L,),
Five hundred juveniles sea bream(3month age) with average weight 4.6 g and length 5.9 cm were used in the present study through the period 2001 to 2004 (3years).
It could be concluded that the complete sexual maturity of male and female occurred at 36month of age . The first maturation in females was recorded at 15 months of age, at weight 267.8g, length 22.4cm, and percentage 0.96 % of the tested sample, while in males was recorded at 12 months with a ratio of 13 % of the tested sample, weight was 73.4- 92.2gand length was 14.9-16.2 cm. The complete sexual maturity of female occurred at 36 months of age at body weight ranging from 461.9 to 934.6g and, which the total length was 30.3-42.4cm,but in males at the same age and average body weights ranging from 340 to 669.4 g with length 29.5-34.6cm. The sea bream male and female fish reached 100% maturation with a sex ratio 1:1.38 for female and male, respectively.