2024-03-28T21:01:48Z
https://jappmu.journals.ekb.eg/?_action=export&rf=summon&issue=10368
Journal of Animal and Poultry Production
2090-3642
2090-3642
2014
5
6
EFFECT OF BETAINE, CHOLINE AND METHIONINE ON PRODUCTIVE AND PHYSIOLOGICAL PERFORMANCE, EGG QUALITY AND SOME BLOOD PARAMETERS OF LOCAL LYING HENS UNDER ENVIRONMENTAL STRESS CONDITIONS.
TorK
Dorra
A.
Raya
Nasra
Awadein
Asmaa
Abou-Ouf
The objective of this study was to determine the effects of dietary supplementation with different betaine , choline and methionine levels on productive performance, egg quality and some blood parameters of laying hens under high ambient temperature. Two hundred and thirty one birds (210 pullts +21cocks ) at 24 weeks -old from Inshas developed strain were divided into seven groups of 30 pullets in three replicats ( 10 pulles and one cock ). The frist group was fed the basal diet without supplementation (control 0 % ) ,the second and the third groups were fed the same diet with betaine (0.1 and 0.2 % ,respectively). Choline and methionine were also supplemented at 0.2 % and 0.4 % for choline and 0.1 % and 0.2% for methionine in group 4 to 7 . Birds of each group were housed in open floor pen .
Results showed that ,body weight change (g/day) increased and feed conversion ( g feed / g egg) improved significantly by dietary supplementation of methionine (0.2% ) during the period from 24 to 36 wks of age . Rectal temperature and respiratory rate were decreased significantly with supplementation of betaine ( 0.1%) and methionine (0.1%) in diet as compared to control group, and no significant effect on egg quality traits except egg weight . It is concluded that supplemental dietary betaine, choline and mithionine enhanced growth performance and reduced respiration rate and rectal temperature and improved some blood parameters forInshas strain subjected to heat stress.
Betaine
choline , methionine, laying, supplementation, productive
2014
06
01
337
351
Journal of Animal and Poultry Production
2090-3642
2090-3642
2014
5
6
EVALUATION OF ESTRUS AND PREGNANCY RATES IN FRIESIAN LACTATING COWS SYNCHRONIZED WITH MELENGESTEROL ACETATE-BASED PROTOCOLS
M.
Abu El - Hamd
A.
Metwally
Z.
Ghallab
M.
El - Kramany
The objective of this study was to evaluate estrus synchronization and pregnancy rate of Friesian lactating cows during postpartum period in melengesterol acetate (MGA) based protocols for estrus synchronization. The total 30 dairy cows were used in this study, average age between 25–68 months and weighting 440 – 620 kg and 1-5 parities was used in this study. At the beginning of the experimental period, the experimental cows were divided }}}into three similar groups, 10 in each. Cows in the 1st treatment were fed on 0.5 g MGA/cow/day for 14 days. In the 2nd treatment, cows were fed on 0.5 g MGA/cow/day for 14 days followed 33 days later by injection with 3 ml PGF2α. In the 3rd treatment, cows were fed 0.5 g MGA/cow/day for to 14 days followed 26 intramuscularly injected with the 1st dose of 5 ml GnRH, followed 33 days injected with 3 ml PGF2α followed 36 days injected with the 2nd dose GnRH and fixed-time insemination. Results revealed that estrus response after the end of hormonal protocols were statistically (P<0.05) significantly higher in MGA and MGA+PGF2α protocols (90%) than the MGA select protocol (70%). Pregnancy rates assessed in all cows after AI tended to be higher (90%) for the MGA+PGF2α protocol and moderate in MGA select protocol (80%) than in the MGA protocol being for lower (70%). Progesterone concentration (P4) was above 1 ng/ml in all treated animals pre-treatment ranging 2.308 - 3.073 ng/ml. After the oral feeding MGA 0.5 g/cow/day, P4 concentration at days of 7 and 14 was increased in all animals of different protocols than in all animals in pre-treatments. On day 24 post-service, concentration of P4 was higher in responded animals, indicating incidence of pregnancy which were conceived after the PGF2α injection in MGA+PGF2α protocol and GnRH injection of MGA select protocol. The economic evaluation indicated that MGA protocol had the cheapest cost (L.E 4.9/cow), followed by MGA+PGF2α protocol (L.E 16.9/cow). While, MGA select protocol showed the highest cost (L.E 56.9/cow). Inconclusionscows treated by MGA+PGF2α protocol at insemination based on heat incidence to improve their reproductive performance. From the economic point of view, MGA+PGF2α protocol showed the best results (conception rate and costs) compared to the other protocols.
Friesian cows
MGA
GnRH
PGF2α
conception rate and progesterone
2014
06
01
325
336
https://jappmu.journals.ekb.eg/article_70511_dd6836e9fd7b8b4b150cb2732465f042.pdf
Journal of Animal and Poultry Production
2090-3642
2090-3642
2014
5
6
NON-GENETIC FACTORS AFFECTING INCIDENCE OF ABORTION, STILLBIRTH AND POST–NATAL MORTALITY OF EGYPTIAN BUFFALOES
H
El-Regalaty,
H.
Aboul-Ela.
Prenatal mortality is one of the most important causes of production losses in the livestock industry. This study shed lights on the prevalence of abortion and stillbirth, and postnatal mortality up to six months in five buffalo herds (6169 pregnancy cases) to determine the effect of some non-genetic factors on the incidence of the three disorders in five buffalo herds in Egypt. These factors included the effect of farm, year, season and parity on abortion as well as dam's weight at calving, and sex, weight and age (at death) of calves on stillbirth and mortality rate.. Results showed that percentage of pre- and post-natal losses was 16%,, representing 1.33% abortion, 3.65% stillbirth and 11.05% for postnatal mortality up - to six months of age. The incidence of abortion was affected (P<0.001) by season, year, dam's parity, and the farm. The same factors in addition to calf's weight exerted significant (P<0.001) effects on the rate of stillbirth but dam's weight at calving did not show any significant effect (P≥0.05). Incidence of mortality was significantly (P<0.001) affected by season, year, parity, dam's weight at calving, calf's age and weight at death, and farm. This study put more emphasis on the importance of non-genetic effects as the main contributors impacting productive and reproductive performance of buffaloes. Farm conditions, herd management and policy have pronounced effects on the incidence of abortion, stillbirths, and postnatal mortality. The results of this study could be useful to enhancing productive and reproductive performance in large or small sized buffalo herds.
Egyptian Buffaloes
Abortion
stillbirth
mortality
2014
06
01
313
324
https://jappmu.journals.ekb.eg/article_70513_62c0332c68f1300347bd5dfaa03564d3.pdf
Journal of Animal and Poultry Production
2090-3642
2090-3642
2014
5
6
IMPACT OF REPLACING EGG YOLK WITH LECITHIN ON SPERM CHARACTERISTICS, BACTERIAL COUNT AND FERTILIZING ABILITY OF CRYOPRESERVED BUFFALO SEMEN.
M.
El-Sherbieny
Soy bean lecithin has been used to replace egg yolk in the semen extender. The aim of this study was to evaluate the effect of replacing egg yolk by soy-lecithin in tris extender on freezability and fertilizing capacity of buffalo semen. Semen from five buffalo bulls was frozen in tris extender containing 0.5, 1.0 and 2% soy-lecithin (treatments) or 15% egg yolk (control). Percentage of motility, livability and intact acrosome spermatozoa and also bacterial count was assessed in diluted, post-equilibrated and post-thawed semen. Results revealed insignificant differences in percentage of sperm motility in diluted semen. However, percentages of sperm motility, livability and intact acrosome spermatozoa increased (P<0.05) and bacterial count decreased (P<0.05) in post-equilibrated and post-thawed semen extended with 0.5% soy-lecithin. These results reflected in the highest conception rate (66.7%) of buffalo cows inseminated with semen containing 05% soy-lecithin compared with 53.3% in semen containing egg yolk (control). In conclusion, egg yolk could be replaced by soy-lecithin in tris-based extender at a level of 0.5% to increase fertilizing capacity of cryopreserved buffalo semen.
Buffalo
frozen semen
sperm
bacterial count
fertility
2014
06
01
353
364
https://jappmu.journals.ekb.eg/article_70514_b005d7d9b8c9a86847a7738b3de18d57.pdf
Journal of Animal and Poultry Production
2090-3642
2090-3642
2014
5
6
EFFECT OF REPLACING FISH MEAL WITH MEAT AND BONE MEAL IN NILE TILAPIA (O. niloticus) DIETS. 1-NUTRITIONAL EVALUATION AND SAFETY ASSESSMENT STUDY
A.
Gomaa,
G.
El Moghazy.
A growth trial was conducted firstly, to evaluate the effects of using meat and bone meal (MBM) instead of fish meal at rate of 0, 25, 50, 75 and 100% in diets on the growth performance and feed efficiency of Nile tilapia (Tilapia niloticous). Secondly, to assess the safety of inclusion MBM as animal protein source in fish feeds. Five iso-nitrogenous (32% crude protein) and iso-energetic (3500 Kcal estimated digestible energy) diets replacing 25, 50, 75 and 100% of fish meal by MBM were formulated. Each diet was randomly allocated to duplicate groups of fish in fiberglass tanks and each tank was stocked with 25 fingerlings (initial average body weight 1.80 ± 0.15g). Fish were hand fed the experimental diets four times per day for 60 days. For microbial safety assessment of examined fish, three samples from each group were collected at the end of the experiment in sterile bags to measure total bacterial count, total faecal coliform count, bacillus cereus, salmonella and staphylococca. There were no significant differences in terms of final body weight, average weight gain percentage and specific growth rate among fish fed the control diet and those fed diets contained meat and bone meal up to 50% replacement. There were also no significant differences in terms of feed intake, feed conversion ratio and protein efficiency ratio between fish fed the control diet and those contained 25% replacement of fish meal with meat and bone meal. The lowest performance had been recorded for the group of fish fed diet containing 100% meat and bone meal. Total Coliform Count, Faecal Coliform count, Bacillus cereus and Salmonella were not detected in all examined samples. The obtained results of Staphylococcal count showed no significant difference between all groups. The economical efficiency study demonstrated that replacing 25% of fish meal with meat and bone meal had the best net revenue 60.92 L.E. followed by the control 60.88L.E. and 50% replacement of fish meal 58.98 L.E. Although the present results showed that MBM could safely replace up to 50% of fish meal content in Nile tilapia diets without any adverse effect on Nile tilapia performance and its safety use. Yet, the 25% replacement was the most economical.
fish meal
meat and bone meal
nutrition evaluation
safety assessment
2014
06
01
365
376
https://jappmu.journals.ekb.eg/article_70515_b3e82298fb8e09488634721b30fac3f8.pdf