Pub Date : 2021-03-10DOI: 10.21608/EJAP.2021.57448.1007
R.A.M. Somida
The current study aimed to estimate the growth curve parameters through three non-linear models (Logistic, Gompertz and Richards) to determine which model best fits the data. Live weight records of 102 HolsteinFriesian bulls collected between 2017-2019 from a Holstein-Friesian herd that belongs to the Association of Livestock Development (ELLahhamy farm), located thirty kilometers west of Fayoum Governorate. In this work, the parameters of the studied models, asymptotic weight (A), constant of integration (b) and the maturation rate (K) ranged from 626.15 kg to 879.82 kg, 2.708 to 11.08, and 0.0035 to 0.008, respectively. According to the studied parameters of growth functions, Gompertz reached the highest numerical estimated value for (A) and the Logistic function had the lowest value. Parameter (K) estimate by the Gompertz model was similar to that obtained by the Richards model; both values were lower than those attained through the Logistic model (0.008). The inflectionpoint traits, time at Point of inflection (IPT) and weight at point of inflection (IPW) estimates ranged from 300.64 kg to 314.59 kg and 323.92 days to 336.14 days, respectively. The Richards model has the highest estimates of IPW and IPT comparedto the other models, also it had the best adjustment according to model goodness of fitcriteria, by having the lowest values for Akaike information criterion (AIC), Schwarz Bayesian information criter ion (BIC), Mean square error (MSE) and highest coefficient of determination (R2, ,14489.18, 14510.6, 317.37 and 0.9983) followed by the Gompertz, and logistic functions.
本研究旨在通过三种非线性模型(Logistic, Gompertz和Richards)估计生长曲线参数，以确定哪种模型最适合数据。2017-2019年期间从牲畜发展协会(ELLahhamy农场)的荷尔斯坦-弗里西亚牛群中收集的102头荷尔斯坦-弗里西亚公牛的活重记录，该协会位于法尤姆省以西30公里处。本文研究的模型参数为渐近权值(A)、积分常数(b)和成熟率(K)，取值范围分别为626.15 ~ 879.82 kg、2.708 ~ 11.08和0.0035 ~ 0.008。根据所研究的生长函数参数，(A)的数值估估值Gompertz最高，Logistic函数的数值估估值最低。Gompertz模型估计的参数(K)与Richards模型近似;这两个值都低于Logistic模型的结果(0.008)。拐点性状、拐点时间(IPT)和拐点体重(IPW)估计值分别为300.64 kg ~ 314.59 kg和323.92 d ~ 336.14 d。与其他模型相比，Richards模型的IPW和IPT估计值最高，并且在模型拟合优度标准上具有最好的调整，其中赤池信息准则(AIC)、施瓦茨贝叶斯信息准则(BIC)、均方误差(MSE)和决定系数最高(R2, 14489.18、14510.6、317.37和0.9983)，其次是Gompertz和logistic函数。
{"title":"COMPARISON OF THREE NONLINEAR MODELS TO DESCRIBE THE GROWTH CURVE OF HOLSTEIN-FRIESIAN BULLS RAISED UNDER EGYPTIAN CONDITIONS","authors":"R.A.M. Somida","doi":"10.21608/EJAP.2021.57448.1007","DOIUrl":"https://doi.org/10.21608/EJAP.2021.57448.1007","url":null,"abstract":"The current study aimed to estimate the growth curve parameters through three non-linear models (Logistic, Gompertz and Richards) to determine which model best fits the data. Live weight records of 102 HolsteinFriesian bulls collected between 2017-2019 from a Holstein-Friesian herd that belongs to the Association of Livestock Development (ELLahhamy farm), located thirty kilometers west of Fayoum Governorate. In this work, the parameters of the studied models, asymptotic weight (A), constant of integration (b) and the maturation rate (K) ranged from 626.15 kg to 879.82 kg, 2.708 to 11.08, and 0.0035 to 0.008, respectively. According to the studied parameters of growth functions, Gompertz reached the highest numerical estimated value for (A) and the Logistic function had the lowest value. Parameter (K) estimate by the Gompertz model was similar to that obtained by the Richards model; both values were lower than those attained through the Logistic model (0.008). The inflectionpoint traits, time at Point of inflection (IPT) and weight at point of inflection (IPW) estimates ranged from 300.64 kg to 314.59 kg and 323.92 days to 336.14 days, respectively. The Richards model has the highest estimates of IPW and IPT comparedto the other models, also it had the best adjustment according to model goodness of fitcriteria, by having the lowest values for Akaike information criterion (AIC), Schwarz Bayesian information criter ion (BIC), Mean square error (MSE) and highest coefficient of determination (R2, ,14489.18, 14510.6, 317.37 and 0.9983) followed by the Gompertz, and logistic functions.","PeriodicalId":93197,"journal":{"name":"Journal of animal production","volume":"22 1","pages":"29-33"},"PeriodicalIF":0.0,"publicationDate":"2021-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81192045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-10DOI: 10.21608/EJAP.2021.58121.1010
O. Almasri, S. Abou-Bakr, M. A. M. Ibrahim
The objective of this study was to evaluate the productive and reproductive performances of Shami and Holstein cows under the Syrian conditions. In this study, 2654 and 4289 records were collected on 569 Shami and 1669 Holstein cows, respectively during the period from 1978 to 2015 of two experimental stations, Ministry of Agriculture and Land Reclamation, Syria. Data were analyzed using the General Linear Model (XLSTATE. 2020). Age at first calving (AFC), calving interval (CI), total milk yield (TMY), daily milk yield (DMY), and lactation period (LP) were significantly affected (p<0.01) by the breed. The least-square means for AFC, CI, TMY, DMY, and LP were 31±0.14 months, 442±2.83 days, 1587±34.89 kg, 9.1±0.09 kg and 165±2.0 days in Shami breed, respectively, compared to 28.1±0.10 months, 432±3.34 days, 5494±41.21 kg, 16.7±0.11 kg and 332±2.36 days in Holstein breed, respectively, under Syrian conditions. The present study revealed that Shami cows performed less estimates in all studied traits compared to the Holstein cows under the Syrian conditions. Successful management and genetic improvement for Shami cows could enhance their productive and reproductive performances.
{"title":"CHARACTERIZATION OF SOME PRODUCTIVE AND REPRODUCTIVE TRAITS OF SYRIAN SHAMI AND HOLSTEIN COWS UNDER SYRIAN CONDITIONS","authors":"O. Almasri, S. Abou-Bakr, M. A. M. Ibrahim","doi":"10.21608/EJAP.2021.58121.1010","DOIUrl":"https://doi.org/10.21608/EJAP.2021.58121.1010","url":null,"abstract":"The objective of this study was to evaluate the productive and reproductive performances of Shami and Holstein cows under the Syrian conditions. In this study, 2654 and 4289 records were collected on 569 Shami and 1669 Holstein cows, respectively during the period from 1978 to 2015 of two experimental stations, Ministry of Agriculture and Land Reclamation, Syria. Data were analyzed using the General Linear Model (XLSTATE. 2020). Age at first calving (AFC), calving interval (CI), total milk yield (TMY), daily milk yield (DMY), and lactation period (LP) were significantly affected (p<0.01) by the breed. The least-square means for AFC, CI, TMY, DMY, and LP were 31±0.14 months, 442±2.83 days, 1587±34.89 kg, 9.1±0.09 kg and 165±2.0 days in Shami breed, respectively, compared to 28.1±0.10 months, 432±3.34 days, 5494±41.21 kg, 16.7±0.11 kg and 332±2.36 days in Holstein breed, respectively, under Syrian conditions. The present study revealed that Shami cows performed less estimates in all studied traits compared to the Holstein cows under the Syrian conditions. Successful management and genetic improvement for Shami cows could enhance their productive and reproductive performances.","PeriodicalId":93197,"journal":{"name":"Journal of animal production","volume":"107 1","pages":"21-28"},"PeriodicalIF":0.0,"publicationDate":"2021-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78064914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-10DOI: 10.21608/EJAP.2021.54592.1006
Ahmed Shehabeldin, Fikry El-Keraby
The present study aimed to evaluate follicular dynamics, yield, quality and stage of embryos in superovulated Friesian cows with high and low anti-Müllerian (AMH) levels. A total of 10 Friesian cows synchronized with prostaglandin F2α (PGF2α) to bring them in heat before start superovulation protocol. On day 10 post oestrus, cows were injected with 2500 IU pregnant mare serum gonadotrophin hormone (PMSG), then after 48h cow were injected with 3 ml PGF2α and with 5 ml gonadotrophin releasing hormone (GnRH) to induce ovulation on day 14. Cows were artificially inseminated twice at 12 and 24 h after GnRH. Embryos were collected after 7 days from artificial insemination (AI). To measure AMH concentration, 1 blood sample was collected at the beginning of second follicular wave according to ultrasonography. Results showed that numbers of antral follicles and total follicles were significantly greater in high AMH level than in low AMH level donors. Differences in CL numbers of cows in high AMH level was significantly greater than in low AMH level on flushing day. AMH concentration had a significant positive correlation with antral follicles number pretreatment, total CL number on flushing day, and ovulation rate. The average number and recovery rate of recovered embryos from donor cows with high AMH level were significantly greater than those recovered from cows in low AMH level. Parameters of yield, quality, and stage of embryos had highly significant and positive correlation with AMH level. In conclusion, circulating AMH concentration, as endocrine marker, is highly associated individually with superovulatory response and embryo production potential in cows.
本研究旨在评价高低抗勒氏菌(AMH)水平的超排卵弗里斯奶牛的卵泡动力学、产量、胚胎质量和阶段。在开始超排卵方案之前，共10头弗里西亚奶牛同步使用前列腺素F2α (PGF2α)使其进入热态。在发情后第10天，母牛注射2500 IU妊娠母马血清促性腺激素(PMSG)， 48h后，母牛注射3 ml PGF2α和5 ml促性腺激素释放激素(GnRH)，诱导第14天排卵。分别于GnRH后12和24 h对奶牛进行两次人工授精。人工授精(AI) 7 d后收集胚胎。在第二次卵泡波开始时，根据超声检查采集1份血样，测定AMH浓度。结果表明，高水平AMH供者的窦卵泡数和总卵泡数明显高于低水平AMH供者。冲水日，高AMH水平奶牛的CL数差异显著大于低AMH水平奶牛。AMH浓度与预处理后的窦卵泡数、冲洗日总CL数、排卵率呈显著正相关。高AMH供体奶牛平均回收胚胎数量和回收率显著高于低AMH供体奶牛。胚的产量、品质、阶段等参数与AMH水平呈极显著正相关。综上所述，循环AMH浓度作为内分泌指标，与奶牛的超排卵反应和胚胎生产潜力密切相关。
{"title":"ANTI-MÜLLERIAN HORMONE (AMH) AS ENDOCRINE MARKER FOR EMBRYO PRODUCTION IN SUPEROVULATED FRIESIAN COWS","authors":"Ahmed Shehabeldin, Fikry El-Keraby","doi":"10.21608/EJAP.2021.54592.1006","DOIUrl":"https://doi.org/10.21608/EJAP.2021.54592.1006","url":null,"abstract":"The present study aimed to evaluate follicular dynamics, yield, quality and stage of embryos in superovulated Friesian cows with high and low anti-Müllerian (AMH) levels. A total of 10 Friesian cows synchronized with prostaglandin F2α (PGF2α) to bring them in heat before start superovulation protocol. On day 10 post oestrus, cows were injected with 2500 IU pregnant mare serum gonadotrophin hormone (PMSG), then after 48h cow were injected with 3 ml PGF2α and with 5 ml gonadotrophin releasing hormone (GnRH) to induce ovulation on day 14. Cows were artificially inseminated twice at 12 and 24 h after GnRH. Embryos were collected after 7 days from artificial insemination (AI). To measure AMH concentration, 1 blood sample was collected at the beginning of second follicular wave according to ultrasonography. Results showed that numbers of antral follicles and total follicles were significantly greater in high AMH level than in low AMH level donors. Differences in CL numbers of cows in high AMH level was significantly greater than in low AMH level on flushing day. AMH concentration had a significant positive correlation with antral follicles number pretreatment, total CL number on flushing day, and ovulation rate. The average number and recovery rate of recovered embryos from donor cows with high AMH level were significantly greater than those recovered from cows in low AMH level. Parameters of yield, quality, and stage of embryos had highly significant and positive correlation with AMH level. In conclusion, circulating AMH concentration, as endocrine marker, is highly associated individually with superovulatory response and embryo production potential in cows.","PeriodicalId":93197,"journal":{"name":"Journal of animal production","volume":"8 1","pages":"9-19"},"PeriodicalIF":0.0,"publicationDate":"2021-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73032945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-10DOI: 10.21608/EJAP.2021.45550.1004
Hamdy A. Elnagar
Issued by The Egyptian Society of Animal Production INFLUENCE OF YEAST AND LACTOBACILLUS PRODUCTS AS FEED SUPPLEMENTS ON BLOOD PARAMETERS AND REPRODUCTIVE PERFORMANCE OF LACTATING EGYPTIAN BUFFALOES H. A. El-Nagar*, A. M. El-Hais and M. S. Mandouh 1Department of biotechnology, Animal Production Research Institute, Agricultural Research Center, Dokki, Giza, Egypt,2Department of Animal Production, Faculty of agriculture, Tanta University, Egypt. *Corresponding Author's E-mail: elnagar1970@hotmail.com, Cellular phone +201066315955
酵母和乳酸菌产品作为饲料添加剂对哺乳期埃及水牛血液参数和繁殖性能的影响H. A. El-Nagar*， A. M. El-Hais和M. S. Mandouh 1生物技术系，动物生产研究所，农业研究中心，Dokki，吉萨，埃及;2动物生产系，坦塔大学农业学院，埃及。*通讯作者邮箱:elnagar1970@hotmail.com，手机+201066315955
{"title":"INFLUENCE OF YEAST AND LACTOBACILLUS PRODUCTS AS FEED SUPPLEMENTS ON BLOOD PARAMETERS AND REPRODUCTIVE PERFORMANCE OF LACTATING EGYPTIAN BUFFALOES","authors":"Hamdy A. Elnagar","doi":"10.21608/EJAP.2021.45550.1004","DOIUrl":"https://doi.org/10.21608/EJAP.2021.45550.1004","url":null,"abstract":"Issued by The Egyptian Society of Animal Production INFLUENCE OF YEAST AND LACTOBACILLUS PRODUCTS AS FEED SUPPLEMENTS ON BLOOD PARAMETERS AND REPRODUCTIVE PERFORMANCE OF LACTATING EGYPTIAN BUFFALOES H. A. El-Nagar*, A. M. El-Hais and M. S. Mandouh 1Department of biotechnology, Animal Production Research Institute, Agricultural Research Center, Dokki, Giza, Egypt,2Department of Animal Production, Faculty of agriculture, Tanta University, Egypt. *Corresponding Author's E-mail: elnagar1970@hotmail.com, Cellular phone +201066315955","PeriodicalId":93197,"journal":{"name":"Journal of animal production","volume":"2 1","pages":"1-8"},"PeriodicalIF":0.0,"publicationDate":"2021-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76920237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-03-10DOI: 10.21608/EJAP.2021.46306.1005
O. Akinola, Susenbeth Andreas, Adeniyi Agunbiade, A. Fanimo, E. Schlecht
1University of Agriculture, Department of Animal Production & Health, Abeokuta, Nigeria, 2Olabisi Onabanjo University, Department of Animal Production, Nigeria, now at McPherson University, Department of Biological Science, Seriki Sotayo, Nigeria, 3University of Kiel, Institute of Animal Nutrition and Physiology, Germany, 4University of Kassel and University of Göttingen, Animal Husbandry in the Tropics and Subtropics, Germany, *corresponding author: akinolaos@funaab.edu.ng
{"title":"FEED VALUE OF PROCESSED AND ENZYME SUPPLEMENTED CASSAVA PEEL IN GROWING PIGS","authors":"O. Akinola, Susenbeth Andreas, Adeniyi Agunbiade, A. Fanimo, E. Schlecht","doi":"10.21608/EJAP.2021.46306.1005","DOIUrl":"https://doi.org/10.21608/EJAP.2021.46306.1005","url":null,"abstract":"1University of Agriculture, Department of Animal Production & Health, Abeokuta, Nigeria, 2Olabisi Onabanjo University, Department of Animal Production, Nigeria, now at McPherson University, Department of Biological Science, Seriki Sotayo, Nigeria, 3University of Kiel, Institute of Animal Nutrition and Physiology, Germany, 4University of Kassel and University of Göttingen, Animal Husbandry in the Tropics and Subtropics, Germany, *corresponding author: akinolaos@funaab.edu.ng","PeriodicalId":93197,"journal":{"name":"Journal of animal production","volume":"20 1","pages":"35-45"},"PeriodicalIF":0.0,"publicationDate":"2021-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75910141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-19DOI: 10.21608/EJAP.2020.34758.1000
Hamdy A. Elnagar
{"title":"THE RELATIONSHIP BETWEEN TREATMENT OF BUFFALO DAMS WITH PROBIOTIC AND THEIR CALVES BODY WEIGHT, IMMUNITY AND BLOOD COMPONENTS","authors":"Hamdy A. Elnagar","doi":"10.21608/EJAP.2020.34758.1000","DOIUrl":"https://doi.org/10.21608/EJAP.2020.34758.1000","url":null,"abstract":"","PeriodicalId":93197,"journal":{"name":"Journal of animal production","volume":"226 1","pages":"0-0"},"PeriodicalIF":0.0,"publicationDate":"2021-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76921631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-01DOI: 10.21608/ejap.2020.121420
Hamdy A. Elnagar, A. El-Hais, M. Farag
This work aimed to identify the relationship between performance, immune system and blood components of neonatal buffalo calves as affected by their dam treatments (DT) with or without probiotic cultures. 40 Egyptian buffalo cows were used in this study. Dams were classified into 4 treatment groups, G1 as control group without any treatment, Saccharomyces cerevisiae yeast culture (20 g/h/d, YC, G2) group, Lactobacillus acidophilus (20 g/h/d, LB, G3) group, or the half dose of each as a combination (G4). The experimental period was 30-d pretill 105-d postpartum. Results revealed that, the dams treated with YC and LB combination (G4), has the best growth performance during birth and weaning, by increasing calf total gain by 31.7% relative to the control group and the immunoglobulins (IgG, IgA and IgM) concentrations in calf plasma and colostrum, during the first three days after calving. All hematological parameters (RBCs count, PCV percentage and Hb concentration), as well as plasma metabolites (total proteins, albumin, globulin, total lipids, total cholesterol and glucose concentrations) increased (P<0.05), while WBCs and creatinine decreased (P<0.05) in calves of treatment groups as compared to control one, being the best in G4 calves. Total antioxidant capacity and triiodothyronine concentration increased (P<0.05), while AST and ALT activity decreased (P<0.05) in calves of treatment groups as compared to control one, being the best in G4 calves. There were highly significant and strong correlation coefficients (r) between immunoglobulins in calf plasma and colostrum. In conclusion, dietary addition of Saccharomyces cerevisiae (10 g/h/d) and Lactobacillus acidophiolus (10 g/h/d) combination in the diets of Egyptian buffalos 30-d preup to 105-d post-partum improved growth performance, immunity response, blood hematology, metabolites, antioxidant capacity, enzyme activity and T3 hormone of the newborn calves.
{"title":"IMPACT OF BUFFALO DAMS TREATMENT WITH PROBIOTICS ON GROWTH PERFORMANCE, IMMUNE RESPONSES AND BLOOD COMPONENTS OF THEIR NEW BORN CALVES","authors":"Hamdy A. Elnagar, A. El-Hais, M. Farag","doi":"10.21608/ejap.2020.121420","DOIUrl":"https://doi.org/10.21608/ejap.2020.121420","url":null,"abstract":"This work aimed to identify the relationship between performance, immune system and blood components of neonatal buffalo calves as affected by their dam treatments (DT) with or without probiotic cultures. 40 Egyptian buffalo cows were used in this study. Dams were classified into 4 treatment groups, G1 as control group without any treatment, Saccharomyces cerevisiae yeast culture (20 g/h/d, YC, G2) group, Lactobacillus acidophilus (20 g/h/d, LB, G3) group, or the half dose of each as a combination (G4). The experimental period was 30-d pretill 105-d postpartum. Results revealed that, the dams treated with YC and LB combination (G4), has the best growth performance during birth and weaning, by increasing calf total gain by 31.7% relative to the control group and the immunoglobulins (IgG, IgA and IgM) concentrations in calf plasma and colostrum, during the first three days after calving. All hematological parameters (RBCs count, PCV percentage and Hb concentration), as well as plasma metabolites (total proteins, albumin, globulin, total lipids, total cholesterol and glucose concentrations) increased (P<0.05), while WBCs and creatinine decreased (P<0.05) in calves of treatment groups as compared to control one, being the best in G4 calves. Total antioxidant capacity and triiodothyronine concentration increased (P<0.05), while AST and ALT activity decreased (P<0.05) in calves of treatment groups as compared to control one, being the best in G4 calves. There were highly significant and strong correlation coefficients (r) between immunoglobulins in calf plasma and colostrum. In conclusion, dietary addition of Saccharomyces cerevisiae (10 g/h/d) and Lactobacillus acidophiolus (10 g/h/d) combination in the diets of Egyptian buffalos 30-d preup to 105-d post-partum improved growth performance, immunity response, blood hematology, metabolites, antioxidant capacity, enzyme activity and T3 hormone of the newborn calves.","PeriodicalId":93197,"journal":{"name":"Journal of animal production","volume":"11 1","pages":"101-109"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82380807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-01DOI: 10.21608/ejap.2020.121419
Dalia K. A. EL-Hedainy, Kholood Elbanhawy A.K. Elbanhawy, A. Amin, M. Salem, M. Hammoud, A. El-barbary
Data used in this study comprised 1792 records for 1126 buffalo female born from 1980 to 2013, daughters of 101 sires and 896 dams from four buffalo herds (El-Nattafe el gadid, El-Nattafe el kadim, Mahalet mousa and El-gmeza) that belong to the Animal Production Research Institute (APRI), Ministry of Agriculture and Land Reclamation, Egypt. The objective was estimate the heritability and genetic trend of some milk production and longevity traits of Egyptian buffaloes that we know precisely which traits can be improved using genetic improvement. The studied traits were milk production traits (total milk yield, 305days milk yield and lactation period) and longevity traits (total milk yield during the productive life, productive life and number of lactations). The least squares means of the milk production traits were 1176.53, 1172.61 kg and 202 days of the total milk yield, 305-days milk yield and lactation period, respectively. The least squares means of longevity traits were 6905.04 kg, 952 days and 5.6 lactation of total milk yield during productive life, productive life and number of lactations, respectively. The heritability estimates for the milk production traits were 0.498 of the total milk yield, 0.492 of 305-days milk yield and 0.189 for lactation period. The heritability estimates for longevity traits were 0.497 of total milk yield during productive life, 0.498 of productive life and 0.069 of number of lactations. The estimated breeding values for all traits varied widely. The genetic trends of animal and dam breeding values were significant for all studied. This confirms that the genetic improvement of these traits leads to increased milk production.
本研究中使用的数据包括来自埃及农业和土地复垦部动物生产研究所(APRI)的四个水牛群(el - nattafe el gadid、el - nattafe el kadim、Mahalet mousa和el -gmeza)的1126头母水牛、101头公水牛的女儿和896头公水牛的1792条记录。目的是估计埃及水牛一些产奶和长寿性状的遗传力和遗传趋势，以便我们准确地知道哪些性状可以通过遗传改良得到改善。研究的性状为产奶量性状(总产奶量、305天产奶量和哺乳期)和寿命性状(生育期总产奶量、生育期和泌乳次数)。产奶量性状的最小二乘均值分别为1176.53、1172.61 kg和202天总产奶量、305天产奶量和哺乳期。寿命性状的最小二乘均值分别为产乳期总产奶量、产乳期和泌乳次数的6905.04 kg、952天和5.6次。产奶量性状的遗传力分别为总产奶量0.498、305天产奶量0.492和哺乳期0.189。长寿性状的遗传力分别为生育期总产奶量0.497、生育期0.498和泌乳次数0.069。各性状的估计育种值差异很大。所有研究对象的遗传趋势和育种价值均具有显著性。这证实了这些性状的遗传改良导致了产奶量的增加。
{"title":"GENETIC TREND FOR MILK PRODUCTION AND LONGEVITY TRAITS OF EGYPTIAN BUFFALO","authors":"Dalia K. A. EL-Hedainy, Kholood Elbanhawy A.K. Elbanhawy, A. Amin, M. Salem, M. Hammoud, A. El-barbary","doi":"10.21608/ejap.2020.121419","DOIUrl":"https://doi.org/10.21608/ejap.2020.121419","url":null,"abstract":"Data used in this study comprised 1792 records for 1126 buffalo female born from 1980 to 2013, daughters of 101 sires and 896 dams from four buffalo herds (El-Nattafe el gadid, El-Nattafe el kadim, Mahalet mousa and El-gmeza) that belong to the Animal Production Research Institute (APRI), Ministry of Agriculture and Land Reclamation, Egypt. The objective was estimate the heritability and genetic trend of some milk production and longevity traits of Egyptian buffaloes that we know precisely which traits can be improved using genetic improvement. The studied traits were milk production traits (total milk yield, 305days milk yield and lactation period) and longevity traits (total milk yield during the productive life, productive life and number of lactations). The least squares means of the milk production traits were 1176.53, 1172.61 kg and 202 days of the total milk yield, 305-days milk yield and lactation period, respectively. The least squares means of longevity traits were 6905.04 kg, 952 days and 5.6 lactation of total milk yield during productive life, productive life and number of lactations, respectively. The heritability estimates for the milk production traits were 0.498 of the total milk yield, 0.492 of 305-days milk yield and 0.189 for lactation period. The heritability estimates for longevity traits were 0.497 of total milk yield during productive life, 0.498 of productive life and 0.069 of number of lactations. The estimated breeding values for all traits varied widely. The genetic trends of animal and dam breeding values were significant for all studied. This confirms that the genetic improvement of these traits leads to increased milk production.","PeriodicalId":93197,"journal":{"name":"Journal of animal production","volume":"17 6","pages":"95-100"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72582190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-01DOI: 10.21608/ejap.2020.121421
Hamdy A. Elnagar
The seminal plasma separated from ejaculates of the same or different animal species has been used as an extender for semen preservation to minimize the negative effects of reduced temperatures and cryo-damage on mammalian spermatozoa. The semen of sexually-matured buffalo bulls (n=5) collected at 3-4 day-interval by artificial vagina was used in this study for a duration of 12 weeks. Spermatozoal mass motility was at least 70%. Semen was collected, pooled, diluted with bovine seminal plasma (BSP) (after adding egg-yolk, glycerin and anti-biotics) or Tris-extender at 3 dilution rates (1:10, 1:15 and 1:20), equilibrated at cool temperature (4-5C) for 2 h, frozen for one month at -196C (liquid nitrogen), and thawed at 37C for 15 s. Semen was evaluated for the percentages of progressive motility (PM), live sperm (LS), sperm abnormalities (SA), acrosome damage (AD), and membrane integrity (MI) in diluted, equilibrated and thawed cases, besides the head to head agglutination (HHA) percentage post-thawing. In the sperm medium of thawed semen, AST, ALT, LDH activities and total antioxidant activity (TAA) levels were also determined. Sperm fertilizability was recorded based on the best results for BSP or Tris-extender. Results showed that freezability parameters (PM, LS, SA, AD, MI and HHA percentages), the activity of AST, ALT and LDH, and TAA and conception rate were improved (P<0.05) for thawed buffalo semen diluted with BSP at a rate of 1:20 in comparison with Tris-extender at 1:10. The bovine seminal plasma of excluded ejaculates for poor quality could be considered as a promising successful extender for cryopreserved buffalo semen.
{"title":"POSSIBILITY OF USING THE BOVINE SEMINAL PLASMA AS A DILUENT FOR CRYOPRESERVATION OF EGYPTIAN BUFFALO SEMEN","authors":"Hamdy A. Elnagar","doi":"10.21608/ejap.2020.121421","DOIUrl":"https://doi.org/10.21608/ejap.2020.121421","url":null,"abstract":"The seminal plasma separated from ejaculates of the same or different animal species has been used as an extender for semen preservation to minimize the negative effects of reduced temperatures and cryo-damage on mammalian spermatozoa. The semen of sexually-matured buffalo bulls (n=5) collected at 3-4 day-interval by artificial vagina was used in this study for a duration of 12 weeks. Spermatozoal mass motility was at least 70%. Semen was collected, pooled, diluted with bovine seminal plasma (BSP) (after adding egg-yolk, glycerin and anti-biotics) or Tris-extender at 3 dilution rates (1:10, 1:15 and 1:20), equilibrated at cool temperature (4-5C) for 2 h, frozen for one month at -196C (liquid nitrogen), and thawed at 37C for 15 s. Semen was evaluated for the percentages of progressive motility (PM), live sperm (LS), sperm abnormalities (SA), acrosome damage (AD), and membrane integrity (MI) in diluted, equilibrated and thawed cases, besides the head to head agglutination (HHA) percentage post-thawing. In the sperm medium of thawed semen, AST, ALT, LDH activities and total antioxidant activity (TAA) levels were also determined. Sperm fertilizability was recorded based on the best results for BSP or Tris-extender. Results showed that freezability parameters (PM, LS, SA, AD, MI and HHA percentages), the activity of AST, ALT and LDH, and TAA and conception rate were improved (P<0.05) for thawed buffalo semen diluted with BSP at a rate of 1:20 in comparison with Tris-extender at 1:10. The bovine seminal plasma of excluded ejaculates for poor quality could be considered as a promising successful extender for cryopreserved buffalo semen.","PeriodicalId":93197,"journal":{"name":"Journal of animal production","volume":"4 1","pages":"111-120"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74522234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-09-01DOI: 10.21608/ejap.2020.121422
K. Adelakun, K. Adelakun, S. Halidu, T. Babatunde, B. Fadimu
1Department of Wildlife Domestication and Conservation, Forestry Research Institute of Nigeria, P.M.B. 5054, Jericho Hill, Ibadan Oyo State, Nigeria, 2Department of Wildlife and Ecotourism, Federal College of Wildlife Management, Forestry Research Institute of Nigeria, P.M.B. 268, New Bussa, Nigeria, 3Department of Forestry Technology, Federal College of Forestry of Forestry Research Institute of Nigeria,, P.M.B. 5054, Jericho Hill, Ibadan Oyo State, Nigeria. *Corresponding author: Kehinde Moruff Adelakun: e-mail: adelakunkehinde@gmail.com
{"title":"BIOCHEMICAL EVALUATION OF MEAT AND HAEMOLYMPH OF AFRICAN LAND SNAIL (ARCHACHATINAMARGINATA, SWAINSON) IN SOUTH-WEST NIGERIA","authors":"K. Adelakun, K. Adelakun, S. Halidu, T. Babatunde, B. Fadimu","doi":"10.21608/ejap.2020.121422","DOIUrl":"https://doi.org/10.21608/ejap.2020.121422","url":null,"abstract":"1Department of Wildlife Domestication and Conservation, Forestry Research Institute of Nigeria, P.M.B. 5054, Jericho Hill, Ibadan Oyo State, Nigeria, 2Department of Wildlife and Ecotourism, Federal College of Wildlife Management, Forestry Research Institute of Nigeria, P.M.B. 268, New Bussa, Nigeria, 3Department of Forestry Technology, Federal College of Forestry of Forestry Research Institute of Nigeria,, P.M.B. 5054, Jericho Hill, Ibadan Oyo State, Nigeria. *Corresponding author: Kehinde Moruff Adelakun: e-mail: adelakunkehinde@gmail.com","PeriodicalId":93197,"journal":{"name":"Journal of animal production","volume":"16 1","pages":"121-126"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87571964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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