Pub Date : 2021-08-01DOI: 10.21608/jappmu.2021.89909.1018
Alaa Youssef, W. Ramadan, W. Khalil, M. El-Harairy
Twenty-five non-pregnant adult Barki ewes were used to investigate the effect of the addition of various levels of rumen-protected methionine as a feed additive on some wool characteristics, blood components, and wool ultrastructure. Animals were divided according to live body weight and wool measurements into 5 groups. The control group (G1) was fed a basal diet without any supplementations, while G2, G3, G4, and G5 were fed the basal diet supplemented with 6, 9, 12, and 15 g methionine /head/day, respectively, for six months. Wool samples were collected at the end of the experiment to record some wool measurements, such as fiber diameter, staple length, staple strength, elongation, point of break, and clean wool yield. Blood samples were collected to determine some blood biochemicals. Results showed that adding rumen-protected methionine for six months significantly enhanced the wool characteristics of Barki ewes, such as staple length, staple strength, elongation, point of break, fiber diameter, and clean wool yield. Supplementing dietary methionine affected coarse fiber wool scale properties of Barki ewes. The minimum value of scale width was recorded in G2, while the maximum value of scale width was recorded in G5. Also, G2 showed the highest value of scale distance to the edge. Wool of G4 recorded the lowest value of coarse fiber diameter. Methionine supplementation resulted in a slight effect on the values of some blood biochemical parameters. The a propriate dietary methionine supplementation was 12 g /head/day.
以25只未怀孕的成年巴尔基母羊为试验对象，研究了在饲料中添加不同水平的保护瘤胃蛋氨酸对其部分羊毛特性、血液成分和羊毛超微结构的影响。按活重和毛数分为5组。对照组(G1)饲喂基础饲粮，不添加任何添加物，G2、G3、G4和G5分别在基础饲粮中添加6、9、12和15 g蛋氨酸/头/天，连续6个月。实验结束时采集羊毛样品，记录羊毛的一些测量数据，如纤维直径、短纤长度、短纤强度、伸长率、断裂点和净毛率。采集血液样本以确定血液中的一些生化物质。结果表明，6个月添加过瘤胃蛋氨酸显著提高了巴尔基母羊的羊毛特性，如短纤长度、短纤强度、伸长率、断裂点、纤维直径和净毛产量。饲粮中添加蛋氨酸对八哥母羊粗纤维羊毛鳞片性能有影响。刻度宽度最小值记录在G2，刻度宽度最大值记录在G5。G2与边缘的尺度距离最大。G4羊毛粗纤维直径最小。蛋氨酸的补充对部分血液生化指标有轻微影响。饲粮中蛋氨酸的适宜添加量为12 g /头/天。
{"title":"Impact of adding dietary different levels of protected methionine on wool characteristics, ultrastructure, and blood components of Barki sheep","authors":"Alaa Youssef, W. Ramadan, W. Khalil, M. El-Harairy","doi":"10.21608/jappmu.2021.89909.1018","DOIUrl":"https://doi.org/10.21608/jappmu.2021.89909.1018","url":null,"abstract":"Twenty-five non-pregnant adult Barki ewes were used to investigate the effect of the addition of various levels of rumen-protected methionine as a feed additive on some wool characteristics, blood components, and wool ultrastructure. Animals were divided according to live body weight and wool measurements into 5 groups. The control group (G1) was fed a basal diet without any supplementations, while G2, G3, G4, and G5 were fed the basal diet supplemented with 6, 9, 12, and 15 g methionine /head/day, respectively, for six months. Wool samples were collected at the end of the experiment to record some wool measurements, such as fiber diameter, staple length, staple strength, elongation, point of break, and clean wool yield. Blood samples were collected to determine some blood biochemicals. Results showed that adding rumen-protected methionine for six months significantly enhanced the wool characteristics of Barki ewes, such as staple length, staple strength, elongation, point of break, fiber diameter, and clean wool yield. Supplementing dietary methionine affected coarse fiber wool scale properties of Barki ewes. The minimum value of scale width was recorded in G2, while the maximum value of scale width was recorded in G5. Also, G2 showed the highest value of scale distance to the edge. Wool of G4 recorded the lowest value of coarse fiber diameter. Methionine supplementation resulted in a slight effect on the values of some blood biochemical parameters. The a propriate dietary methionine supplementation was 12 g /head/day.","PeriodicalId":14889,"journal":{"name":"Journal of Animal and Poultry Production","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82493938","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 : 2021-08-01DOI: 10.21608/jappmu.2021.197384
M. El-Sharawy
A total of 2054 records of primiparous buffalo cows calved during 2000-2019 was collected from five Egyptian buffalo herds. The studied traits were birth weight (BW), total milk yield (TMY), lactation period (LP), age at first calving (AFC), gestation length (GL), days open (DO), and calving interval (CI). Year and season of calving, sex and herd were used as fixed effects. Genetic parameters were estimated using two models, the first model to estimate variance components and heritability, and the second model was estimated the genetic correlations among studied traits. Results showed that the heritability values were moderate for BW, LP and TMY (0.48, 0.23 and 0.50, respectively), suggesting that genetic improvement programs using the selection could be effective to improve these traits, but all reproductive traits were low, being 0.07, 0.02 0.0 and 0.12 for GL, DO, CI, and AFC, respectively, inferring that these traits could be improved using environmental and marginal conditions. The genetic correlation of the current study indicated that the selection for increasing BW of Egyptian buffalo could be followed by an improvement of TMY, longer LP and GL. The genetic correlation between productive traits and reproductive traits were positive ranged from 0.04 (TMY-AFC) to 0.91 (LP-DO and LP-CI). Selection of buffalo to reproduction traits would be ineffective or take long time because they are influenced by farm management, unlike productive traits.
{"title":"GENETIC Parameters for some Productive and Reproductive Traits for First Lactation in Egyptian Buffalo","authors":"M. El-Sharawy","doi":"10.21608/jappmu.2021.197384","DOIUrl":"https://doi.org/10.21608/jappmu.2021.197384","url":null,"abstract":"A total of 2054 records of primiparous buffalo cows calved during 2000-2019 was collected from five Egyptian buffalo herds. The studied traits were birth weight (BW), total milk yield (TMY), lactation period (LP), age at first calving (AFC), gestation length (GL), days open (DO), and calving interval (CI). Year and season of calving, sex and herd were used as fixed effects. Genetic parameters were estimated using two models, the first model to estimate variance components and heritability, and the second model was estimated the genetic correlations among studied traits. Results showed that the heritability values were moderate for BW, LP and TMY (0.48, 0.23 and 0.50, respectively), suggesting that genetic improvement programs using the selection could be effective to improve these traits, but all reproductive traits were low, being 0.07, 0.02 0.0 and 0.12 for GL, DO, CI, and AFC, respectively, inferring that these traits could be improved using environmental and marginal conditions. The genetic correlation of the current study indicated that the selection for increasing BW of Egyptian buffalo could be followed by an improvement of TMY, longer LP and GL. The genetic correlation between productive traits and reproductive traits were positive ranged from 0.04 (TMY-AFC) to 0.91 (LP-DO and LP-CI). Selection of buffalo to reproduction traits would be ineffective or take long time because they are influenced by farm management, unlike productive traits.","PeriodicalId":14889,"journal":{"name":"Journal of Animal and Poultry Production","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74303270","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 : 2021-08-01DOI: 10.21608/jappmu.2021.197407
E. Mankola., M. Rabie, Hayam M. Abo El-Maaty, A. Elnaggar
A6-weeks study was designed to evaluate the growth performance, biochemical parameters, immune response and thyroid hormones of broiler chickens in response to feeding diets enriched with different types of natural antioxidants. Two hundred and fifty unsexed Arbor Acres broiler chicks were used in the present study.Day-old chicks were individually weighed and randomly divided into five dietary treatments with five replications of ten chicks each. Growth performance was measured. Serum concentrations of immunoglobulins(IgA, IgG and IgM)mg/dl, total antioxidant capacity(TAC) nmol/ml, malondialdehyde(MDA)U/ml/h and thyroid hormones:thyroxine(T4)ng/ml and triiodothyronine(T3)ng/ml were determined. Activity of superoxide dismutase(SOD)U/ml/h in blood serum was also measured. The results obtained revealed that feeding the natural antioxidants-supplemented diets to Arbor Acres broiler chicks positively affected (P≤0.05) their LBW, BWG and FCR at 6 weeks of age compared with control graup. The FI of the supplemented groups of chicks was significantly lower (P≤0.05) than that of the control group, except the ascorbic acid-enriched group which consumed comparable amount of feed to that of the control birds. Feeding the natural antioxidants-fortified diets to broilers caused significant increases (P≤0.05) in serum levels of immunoglobulins (IgA, IgG and IgM),SOD andT3 but serum Alb level was not affected., and significantly improved (P≤0.01) serum concentration of TAC compared with the control birds. But serum T4 concentration was significantly higher(P≤0.05) in chicks fed Diet3(contained15% GP)than the control and other experimental groups. Based on the obtained results,it can be concluded that feeding natural antioxidants-enriched diets to broiler chicks have beneficial effects on their growth performance,immunity and antioxidant status.
{"title":"Utilization of Natural Antioxidants to Improve the Growth Performance of Broiler Chicks","authors":"E. Mankola., M. Rabie, Hayam M. Abo El-Maaty, A. Elnaggar","doi":"10.21608/jappmu.2021.197407","DOIUrl":"https://doi.org/10.21608/jappmu.2021.197407","url":null,"abstract":"A6-weeks study was designed to evaluate the growth performance, biochemical parameters, immune response and thyroid hormones of broiler chickens in response to feeding diets enriched with different types of natural antioxidants. Two hundred and fifty unsexed Arbor Acres broiler chicks were used in the present study.Day-old chicks were individually weighed and randomly divided into five dietary treatments with five replications of ten chicks each. Growth performance was measured. Serum concentrations of immunoglobulins(IgA, IgG and IgM)mg/dl, total antioxidant capacity(TAC) nmol/ml, malondialdehyde(MDA)U/ml/h and thyroid hormones:thyroxine(T4)ng/ml and triiodothyronine(T3)ng/ml were determined. Activity of superoxide dismutase(SOD)U/ml/h in blood serum was also measured. The results obtained revealed that feeding the natural antioxidants-supplemented diets to Arbor Acres broiler chicks positively affected (P≤0.05) their LBW, BWG and FCR at 6 weeks of age compared with control graup. The FI of the supplemented groups of chicks was significantly lower (P≤0.05) than that of the control group, except the ascorbic acid-enriched group which consumed comparable amount of feed to that of the control birds. Feeding the natural antioxidants-fortified diets to broilers caused significant increases (P≤0.05) in serum levels of immunoglobulins (IgA, IgG and IgM),SOD andT3 but serum Alb level was not affected., and significantly improved (P≤0.01) serum concentration of TAC compared with the control birds. But serum T4 concentration was significantly higher(P≤0.05) in chicks fed Diet3(contained15% GP)than the control and other experimental groups. Based on the obtained results,it can be concluded that feeding natural antioxidants-enriched diets to broiler chicks have beneficial effects on their growth performance,immunity and antioxidant status.","PeriodicalId":14889,"journal":{"name":"Journal of Animal and Poultry Production","volume":"5 3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78336239","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 : 2021-08-01DOI: 10.21608/jappmu.2021.198385
Z. Kalaba, Hayam Abo Elmaaty, Sanaa EL-Faiomy
The experimental feeding trial of this research was carried out to estimate the effects of dietary supplementation with potassium chloride (KCI), Sodium bicarbonate (NaHCO3); singly or in combination, on the performance and consequent physiological responses of broiler chicks reared under naturally occurring summer heat stress. Five hundred forty unsexed one-day-old broiler chikens were allocated to 12 experimental group, each with 3 replicates. All chicks were placed in a naturally ventilated rearing room. Diets of chicks supplemented with KCl or NaHCo3 singly or in combination. Treatment 1 survived as a control, KCl at levels of 0.3, 0.6 and 0.9% of diets for chicks of T2, T3 and T4, NaHCo3 at levels of 0.25 and 0.5% of diets for chicks of T5 and T6 respectively. Diets for chicks of T7, T8, T9, T10, T11 and T12 contain a mixture KCl and NaHCO3. Broiler growth performance and selected blood parameters were expected. It was experiential that broiler chickens feeding a diet a containing combination between 0.6% potassium chloride and 0.5% sodium bicarbonate had significantly higher body weight and body weight gain with the best value of feed efficiency, more viability than other treatments and weights of carcass and percentages of liver, heart, gizzard, thighs and breast.
{"title":"Alleviating Adverse Effects of Heat Stress by Using Potassium Chloride or/and Sodium Bicarbonate for Broiler Chicks.","authors":"Z. Kalaba, Hayam Abo Elmaaty, Sanaa EL-Faiomy","doi":"10.21608/jappmu.2021.198385","DOIUrl":"https://doi.org/10.21608/jappmu.2021.198385","url":null,"abstract":"The experimental feeding trial of this research was carried out to estimate the effects of dietary supplementation with potassium chloride (KCI), Sodium bicarbonate (NaHCO3); singly or in combination, on the performance and consequent physiological responses of broiler chicks reared under naturally occurring summer heat stress. Five hundred forty unsexed one-day-old broiler chikens were allocated to 12 experimental group, each with 3 replicates. All chicks were placed in a naturally ventilated rearing room. Diets of chicks supplemented with KCl or NaHCo3 singly or in combination. Treatment 1 survived as a control, KCl at levels of 0.3, 0.6 and 0.9% of diets for chicks of T2, T3 and T4, NaHCo3 at levels of 0.25 and 0.5% of diets for chicks of T5 and T6 respectively. Diets for chicks of T7, T8, T9, T10, T11 and T12 contain a mixture KCl and NaHCO3. Broiler growth performance and selected blood parameters were expected. It was experiential that broiler chickens feeding a diet a containing combination between 0.6% potassium chloride and 0.5% sodium bicarbonate had significantly higher body weight and body weight gain with the best value of feed efficiency, more viability than other treatments and weights of carcass and percentages of liver, heart, gizzard, thighs and breast.","PeriodicalId":14889,"journal":{"name":"Journal of Animal and Poultry Production","volume":"98 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77228511","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 : 2021-08-01DOI: 10.21608/jappmu.2021.197368
M. Kamel, M. Abo-Farw, E. El-Maghraby
During breeding season, plasma prolactin concentration levels were measured pre-mating and monthly up to the 12 months post-mating in all animals (n=20), and post-calving only in pregnant animals (n=17) of 20 Maghrebi she-camels. The experimental she-camels were divided according to their parity order (1 to 6 parity). Concentration of prolactin was determined of all parities at different reproductive stages (Pre-mating, pregnancy stages, and post-calving). Results showed insignificant (P≥0.05) effect of camel parity on prolactin concentration at each reproductive stage, but prolactin showed similar trend of changes within each parity by advancing reproductive stage. Plasma prolactin nearly maintained its levels during the period from pre-mating up to the 9 month post-mating, then started to increase (P<0.05) up to the 12 months post mating. Prolactin showed similarity in pregnant and non-pregnant during the 1 month post-mating and insignificant differences from the 3 month up to the 9 month post-mating, thereafter showed significant increase in pregnant than in non-pregnant up to the 12 months post-mating.From the results of the study, it is clear that the effect of camel parity order/age on blood prolactin levels is limited. However, blood prolactin level was pronouncedly affected by reproductive status of shecamels such as pre-mating estrous activity, pregnancy stage, and calving and lactation.
{"title":"Variation of Blood Prolactin Concentration at Different Reproductive Stages in the Maghrebi She-Camel.","authors":"M. Kamel, M. Abo-Farw, E. El-Maghraby","doi":"10.21608/jappmu.2021.197368","DOIUrl":"https://doi.org/10.21608/jappmu.2021.197368","url":null,"abstract":"During breeding season, plasma prolactin concentration levels were measured pre-mating and monthly up to the 12 months post-mating in all animals (n=20), and post-calving only in pregnant animals (n=17) of 20 Maghrebi she-camels. The experimental she-camels were divided according to their parity order (1 to 6 parity). Concentration of prolactin was determined of all parities at different reproductive stages (Pre-mating, pregnancy stages, and post-calving). Results showed insignificant (P≥0.05) effect of camel parity on prolactin concentration at each reproductive stage, but prolactin showed similar trend of changes within each parity by advancing reproductive stage. Plasma prolactin nearly maintained its levels during the period from pre-mating up to the 9 month post-mating, then started to increase (P<0.05) up to the 12 months post mating. Prolactin showed similarity in pregnant and non-pregnant during the 1 month post-mating and insignificant differences from the 3 month up to the 9 month post-mating, thereafter showed significant increase in pregnant than in non-pregnant up to the 12 months post-mating.From the results of the study, it is clear that the effect of camel parity order/age on blood prolactin levels is limited. However, blood prolactin level was pronouncedly affected by reproductive status of shecamels such as pre-mating estrous activity, pregnancy stage, and calving and lactation.","PeriodicalId":14889,"journal":{"name":"Journal of Animal and Poultry Production","volume":"71 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77008409","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 : 2021-08-01DOI: 10.21608/jappmu.2021.197396
A. Gabr, F. Farrag, M. Ahmed, N. Hamed
Somatic cell count (SCC) in milk is of interest to dairy goat breeders because of its influence not only on milk production but also on longevity and profitability. This study’s aim was therefore to consider the production traits and udder morphometry relationships between them and SCC. For this purpose, production traits and twelve udder traits were measured from 152 clinically healthy dairy Zaraibi goats at the first four parities of lactations. The examined goats were classified into three categories according to SCC in milk; (≤470x10 cells/ml), (from 471 to ≤500x10 cells/ml) and (>500x10 cells/ml). Results showed that the goats with SCC ≤470x10 cells/ml had significantly the highest values of all studied production parameters. Likewise, the udder and teats measurements showed to be different depending on SCC in milk. However, the studied parameters were with highly significant negative correlations with SCC. The teat position and udder attachment scores were high in goats at SCC ≤470x10 cells/ml, and such scores negatively decreased when SCC values increased. However, the maximum r value (62.8%) obtained from regression equation for predicting SCC was by using average daily milk yield, days in milk, udder depth and width traits. In conclusion, including udder depth and width with teats separation and diameter traits in future breeding programs of Zaraibi goats would be useful to ensure that the selection for increased productivity is not accompanied by unwanted deterioration. In addition, these relations could be used as an indirect diagnosis of SCC in Zaraibi goats milk.
{"title":"Relationship of Production Traits and Udder Morphometry with Somatic Cell Count in Zaraibi Goats","authors":"A. Gabr, F. Farrag, M. Ahmed, N. Hamed","doi":"10.21608/jappmu.2021.197396","DOIUrl":"https://doi.org/10.21608/jappmu.2021.197396","url":null,"abstract":"Somatic cell count (SCC) in milk is of interest to dairy goat breeders because of its influence not only on milk production but also on longevity and profitability. This study’s aim was therefore to consider the production traits and udder morphometry relationships between them and SCC. For this purpose, production traits and twelve udder traits were measured from 152 clinically healthy dairy Zaraibi goats at the first four parities of lactations. The examined goats were classified into three categories according to SCC in milk; (≤470x10 cells/ml), (from 471 to ≤500x10 cells/ml) and (>500x10 cells/ml). Results showed that the goats with SCC ≤470x10 cells/ml had significantly the highest values of all studied production parameters. Likewise, the udder and teats measurements showed to be different depending on SCC in milk. However, the studied parameters were with highly significant negative correlations with SCC. The teat position and udder attachment scores were high in goats at SCC ≤470x10 cells/ml, and such scores negatively decreased when SCC values increased. However, the maximum r value (62.8%) obtained from regression equation for predicting SCC was by using average daily milk yield, days in milk, udder depth and width traits. In conclusion, including udder depth and width with teats separation and diameter traits in future breeding programs of Zaraibi goats would be useful to ensure that the selection for increased productivity is not accompanied by unwanted deterioration. In addition, these relations could be used as an indirect diagnosis of SCC in Zaraibi goats milk.","PeriodicalId":14889,"journal":{"name":"Journal of Animal and Poultry Production","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87008826","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 : 2021-08-01DOI: 10.21608/jappmu.2021.85100.1016
A. El-dakar, S. Shalaby,, Heba Allah. Saied, M. Abdel-Aziz
A 15 day acclimation experiment was conducted to determine the optimum feeding level during an acclimatization period to marine water for improving survival rate and gonadosomatic index (GSI) of adult red hybrid tilapia in high salinities. This experiment examined four levels of feeding as the follows; treatment (T1) the control group, which was acclimated without feeding, T2, T3 and T4 were fed at feeding rates 0.5, 1, and 2% of brood-fish weight, respectively. Using mixed sex stocks of adult red tilapia, fish were randomly stocked at rate of one fish / 10 liters in 8 plastic tanks (60 liters) with an average initial weight of 48.75g. Mediterranean Sea water was used to gradually raise the salinity. The statistical analyses appeared significant differences among treatments and confirmed that the growth and GSI indicators are affected by different feeding levels. 0.5% (T2) and 1% (T1) as feeding rates for adult red hybrid tilapia during the acclimatization period had the best and highest in theses indicators in comparison with the control treatment and T4.
{"title":"Effect of Different Levels of Feeding During Acclimatization in High Salinities on Gonadosomatic Index And Survival Rate of Adult Red Hybrid Tilapia, Oreochromis sp.","authors":"A. El-dakar, S. Shalaby,, Heba Allah. Saied, M. Abdel-Aziz","doi":"10.21608/jappmu.2021.85100.1016","DOIUrl":"https://doi.org/10.21608/jappmu.2021.85100.1016","url":null,"abstract":"A 15 day acclimation experiment was conducted to determine the optimum feeding level during an acclimatization period to marine water for improving survival rate and gonadosomatic index (GSI) of adult red hybrid tilapia in high salinities. This experiment examined four levels of feeding as the follows; treatment (T1) the control group, which was acclimated without feeding, T2, T3 and T4 were fed at feeding rates 0.5, 1, and 2% of brood-fish weight, respectively. Using mixed sex stocks of adult red tilapia, fish were randomly stocked at rate of one fish / 10 liters in 8 plastic tanks (60 liters) with an average initial weight of 48.75g. Mediterranean Sea water was used to gradually raise the salinity. The statistical analyses appeared significant differences among treatments and confirmed that the growth and GSI indicators are affected by different feeding levels. 0.5% (T2) and 1% (T1) as feeding rates for adult red hybrid tilapia during the acclimatization period had the best and highest in theses indicators in comparison with the control treatment and T4.","PeriodicalId":14889,"journal":{"name":"Journal of Animal and Poultry Production","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85027182","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 : 2021-01-01DOI: 10.21608/jappmu.2021.188250
Khalid Kewan
This study was planned to investigate the effects of early shearing on the performance and certain metabolic and carcass parameters of growing Barki lambs. Eighteen lambs (23.18± 0.69 kg weight and 4 months of age) were divided into equal two groups. One group was left unshorn and served as a control group (C) while the other group was completely shorn (S) and both groups were housed in shaded pens. All animals were fed concentrate mixture to cover their maintenance requirements otherwise clover hay was offered ad lib to cover growth requirements for a period of 110 days. Results showed that total feed intake increased after shearing and improved by 8.37% over the C group. Shearing increased (P<0.01) daily gain of lambs by 12.87% over than of C group. However, shearing had no effects on the indicators of feed conversion. The shorn group recorded a higher growth rate of net clean wool (5.54g/d) than the control group (3.47g/d). Nutrients digestibilities were generally improved in S group, however, insignificance was observed for CF and EE digestibility values. The rumen pH, NH3-N and VFA were significantly higher in S than C group. The shorn group achieved higher retained N and sulfur. Shorn lambs were more economical efficient in utilizing water than C group. Shearing did not affect dressing percentage; notwithstanding it has a positive financial gain. This study provided clear evidence that under local conditions; the early shearing of growing Barki lambs improved their body weight gain as well as achieved high revenue.
{"title":"Effect of Early Shearing on The Nutritional Metabolism, Growth Performance and Carcass Traits of Barki Lambs تأثير الجز المبکر على التمثيل الغذائي وکفاءة النمو وصفات الذبيحة في الحملان البرقي","authors":"Khalid Kewan","doi":"10.21608/jappmu.2021.188250","DOIUrl":"https://doi.org/10.21608/jappmu.2021.188250","url":null,"abstract":"This study was planned to investigate the effects of early shearing on the performance and certain metabolic and carcass parameters of growing Barki lambs. Eighteen lambs (23.18± 0.69 kg weight and 4 months of age) were divided into equal two groups. One group was left unshorn and served as a control group (C) while the other group was completely shorn (S) and both groups were housed in shaded pens. All animals were fed concentrate mixture to cover their maintenance requirements otherwise clover hay was offered ad lib to cover growth requirements for a period of 110 days. Results showed that total feed intake increased after shearing and improved by 8.37% over the C group. Shearing increased (P<0.01) daily gain of lambs by 12.87% over than of C group. However, shearing had no effects on the indicators of feed conversion. The shorn group recorded a higher growth rate of net clean wool (5.54g/d) than the control group (3.47g/d). Nutrients digestibilities were generally improved in S group, however, insignificance was observed for CF and EE digestibility values. The rumen pH, NH3-N and VFA were significantly higher in S than C group. The shorn group achieved higher retained N and sulfur. Shorn lambs were more economical efficient in utilizing water than C group. Shearing did not affect dressing percentage; notwithstanding it has a positive financial gain. This study provided clear evidence that under local conditions; the early shearing of growing Barki lambs improved their body weight gain as well as achieved high revenue.","PeriodicalId":14889,"journal":{"name":"Journal of Animal and Poultry Production","volume":"11219 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91545249","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 : 2020-12-01DOI: 10.21608/JAPPMU.2020.161181
M. Youssef, A. Mahgoub, H. Galal, Yassmin Mahmoud, A. Hussein, T. Deraz, M. Yacout, Amal M. M. El-Nimer
Twenty four growing male sheep aged 4-6 months, with an average live body weight of 27 Kg, were grouped into six blocks of 4 sheep each block, to determine the effect of replacing clover hay (CH) by pepper or eggplant vines on their performance, nutrients digestibility, rumen fermentation and blood constitutes.The first experimental ration (R1) as a control, animals was fed concentrate feed mixture(CFM) + CH (50:50),ration 2 (R2)was fed 50% CFM + 50% pepper vines (PV), ration 3 (R3) was fed 50% CFM + 25% CH + 25% PV, ration 4 (R4) was fed 50% CFM + 50% eggplant (EV) vines, ration 5 (R5) was fed 50% CFM + 25% CH + 25% EV and ration 6(R6)was fed 50% CFM + 25% PV + 25% EV. The results revealed that both CP and ash contents in CH and the two vines were convergent, but eggplant had more CF content than CH or PV. Insignificant digestibility of CP and CF between control and pepper rations, while it much significant with eggplant. The TDN values were similar for the tested rations,but it decreased for R6. Inclusion of both vines decreased NH3-N and increased TVFA's concentration. There were insignificant differences of feeding rations on blood constitutes;they were in the normal rang. Conclusively,the residues of pepper or eggplant vines could be used as new and economically alternative source of feeds in the growing sheep rations. They can be replacing 50% of clover hay from total balanced ration as they had good feed efficiency.
{"title":"Effect of Feeding Rations Based on the Residues of some Vegetable Crops on Nutrients Digestibility, Rumen Fermentation, some Blood Components and Performance of Growing Sheep's","authors":"M. Youssef, A. Mahgoub, H. Galal, Yassmin Mahmoud, A. Hussein, T. Deraz, M. Yacout, Amal M. M. El-Nimer","doi":"10.21608/JAPPMU.2020.161181","DOIUrl":"https://doi.org/10.21608/JAPPMU.2020.161181","url":null,"abstract":"Twenty four growing male sheep aged 4-6 months, with an average live body weight of 27 Kg, were grouped into six blocks of 4 sheep each block, to determine the effect of replacing clover hay (CH) by pepper or eggplant vines on their performance, nutrients digestibility, rumen fermentation and blood constitutes.The first experimental ration (R1) as a control, animals was fed concentrate feed mixture(CFM) + CH (50:50),ration 2 (R2)was fed 50% CFM + 50% pepper vines (PV), ration 3 (R3) was fed 50% CFM + 25% CH + 25% PV, ration 4 (R4) was fed 50% CFM + 50% eggplant (EV) vines, ration 5 (R5) was fed 50% CFM + 25% CH + 25% EV and ration 6(R6)was fed 50% CFM + 25% PV + 25% EV. The results revealed that both CP and ash contents in CH and the two vines were convergent, but eggplant had more CF content than CH or PV. Insignificant digestibility of CP and CF between control and pepper rations, while it much significant with eggplant. The TDN values were similar for the tested rations,but it decreased for R6. Inclusion of both vines decreased NH3-N and increased TVFA's concentration. There were insignificant differences of feeding rations on blood constitutes;they were in the normal rang. Conclusively,the residues of pepper or eggplant vines could be used as new and economically alternative source of feeds in the growing sheep rations. They can be replacing 50% of clover hay from total balanced ration as they had good feed efficiency.","PeriodicalId":14889,"journal":{"name":"Journal of Animal and Poultry Production","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72621753","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 : 2020-11-01DOI: 10.21608/jappmu.2020.130419
I. A. El-Naser
Data on 1946 buffalo calves born between 2000 and 2016 at Mahallet Mousa farms belonging to Animal Production Research Institute, were utilized in this study. Genetic parameters of birth weight (BW), preweaning daily gain (PWDG) and weaning weight (WW) were estimated using MTDFREML. The different selection indices for previous traits were constructed by Matlab program. Means of BW, PDWG and WW were 37.40 kg, 493.53 g and 90.37 kg, respectively. The heritability estimates for above-mentioned traits were 0.24, 0.26 and 0.29, respectively. The genetic correlations among the mentioned growth traits were ranged from 0.18 to 0.79. Corresponding phenotypic correlations among same traits were ranged from 0.13 to 0.48. The expected genetic gains for direct selection of BW, PWDG and WW were varied between 0.23 -1.18 kg, 10.80 – 23.74 g and 0.50 -3.06 kg, respectively. Comparison among selection indices indicated that the highest expected genetic gains for PWDG (8.73 g) and WW (3.50 kg) were obtained from the index I 4 included (PDWG and WW). Moreover, the accuracy of this index was closest to the highest index of accuracy. Thus, selection based on index I 4 could be improve the response of aggregate genotype for preweaning growth traits of Egyptian buffalo calves.
{"title":"Expected Genetic Gain for Selection of Preweaning Growth Traits in Egyptian Buffaloes","authors":"I. A. El-Naser","doi":"10.21608/jappmu.2020.130419","DOIUrl":"https://doi.org/10.21608/jappmu.2020.130419","url":null,"abstract":"Data on 1946 buffalo calves born between 2000 and 2016 at Mahallet Mousa farms belonging to Animal Production Research Institute, were utilized in this study. Genetic parameters of birth weight (BW), preweaning daily gain (PWDG) and weaning weight (WW) were estimated using MTDFREML. The different selection indices for previous traits were constructed by Matlab program. Means of BW, PDWG and WW were 37.40 kg, 493.53 g and 90.37 kg, respectively. The heritability estimates for above-mentioned traits were 0.24, 0.26 and 0.29, respectively. The genetic correlations among the mentioned growth traits were ranged from 0.18 to 0.79. Corresponding phenotypic correlations among same traits were ranged from 0.13 to 0.48. The expected genetic gains for direct selection of BW, PWDG and WW were varied between 0.23 -1.18 kg, 10.80 – 23.74 g and 0.50 -3.06 kg, respectively. Comparison among selection indices indicated that the highest expected genetic gains for PWDG (8.73 g) and WW (3.50 kg) were obtained from the index I 4 included (PDWG and WW). Moreover, the accuracy of this index was closest to the highest index of accuracy. Thus, selection based on index I 4 could be improve the response of aggregate genotype for preweaning growth traits of Egyptian buffalo calves.","PeriodicalId":14889,"journal":{"name":"Journal of Animal and Poultry Production","volume":"464 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77047499","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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