eng
Mansoura University, Faculty of Agriculture
Journal of Animal and Poultry Production
2090-3642
2090-3723
2012-02-01
3
2
73
82
10.21608/jappmu.2012.82774
82774
Original Article
EFFECT OF COLLECTION FREQUENCY, EXTENDER AND THAWING TEMPERATURE ON THE MOTILITY RECOVERY OF CRYOPRESERVED DROMEDARY CAMEL SPERMATOZOA
K. Bahrawy
1
E. EL-Hassanein
2
S. Rateb
3
Animal and Poultry Physiology Dept., Animal and Poultry Production Division, Desert Res. Center, 1 Mathaf El Mataryia Street, Cairo, Egypt
Animal and Poultry Physiology Dept., Animal and Poultry Production Division, Desert Res. Center, 1 Mathaf El Mataryia Street, Cairo, Egypt
Animal and Poultry Physiology Dept., Animal and Poultry Production Division, Desert Res. Center, 1 Mathaf El Mataryia Street, Cairo, Egypt
The primary objective of this study was to examine ejaculate characteristics and quality of camel bull semen maintained under high (3 /week) and low (2 /week) collection frequencies during the breeding season. Ejaculate characteristics included motility, volume, concentration, detached acrosome, sperm abnormalities, pH, seminal plasma osmolarity and freezing point depression. Significant differences (P<0.01) were observed for ejaculate volume being 13.5 ml versus 7.5 ml for low and high collection frequency, respectively and also pH value (P<0.05) for low frequency of 8.7 versus 8.3 for high frequency semen collection.
The second objective was to determine the optimum thawing temperatures (slow thawing vs. rapid thawing) for cryopreserved camel semen extended in tris lactose extender supplemented with different concentrations of α-amylase. Rapid thawing showed higher post-thaw motility for the control samples as well as the samples at different concentrations of the α-amylase treated samples. That leads to an overall significant difference (P<0.01) in post-thaw motility for rapid thawing being 56.33 % compared to 47.66 % for slow thawed cryopreserved samples. No significant effect was detected for neither the detached acrosome percentage nor the sperm abnormalities.
According to the present results scheduling a collection program of two semen collection times per week, using alpha-amylase supplemented tris-lactose extender with rapid thawing protocol is recommended for a desired high yield of acceptable insemination doses during the breeding season of male camels.
https://jappmu.journals.ekb.eg/article_82774_a988d31a2bf7620e51d1e0be533e8ec0.pdf
dromedary
Semen
Collection frequency
cryopreservation
Thawing rate
eng
Mansoura University, Faculty of Agriculture
Journal of Animal and Poultry Production
2090-3642
2090-3723
2012-02-01
3
2
83
97
10.21608/jappmu.2012.82777
82777
Original Article
EFFECT OF PROTECTING DIETARY PROTEIN WITH ZINC SULPHATE ON PERFORMANCE OF LACTATING COWS The concentration of plasma urea-N was decreased when cows were given protected CFM-protein than those fed unprotected one, whereas, the concentrations of total protein, albumin and globulin were increased.
H. El-Shabrawy
1
K. Etman
2
S. Ibrahim
3
A. Mehrez
4
Animal Production Res. Inst., Agric. Res. Centre, Dokki, Giza, Egypt.
Animal Production Res. Inst., Agric. Res. Centre, Dokki, Giza, Egypt.
Animal Production Res. Inst., Agric. Res. Centre, Dokki, Giza, Egypt.
Animal Production Dept., Fac. Agric., Mansoura University.
Fifteen lactating crossbred Friesian cows in early lactating were randomly assigned into three groups (five animals each). Three experimental diets were formulated to study the effect of protected protein of concentrate feed mixture (CFM) by zinc sulphate on nutrients digestibility, some rumen fermentation characteristics, some plasma metabolite concentrates and their reflection on milk production and its components of cows fed berssem hay (BH) based diet. The ratio of BH to CFM was 40 to 60 on dry matter basis. Diets were supplemented with CFM; Zn- CFM and combination of Zn- CFM and CFM at rate of (1:1).
The obtained results indicated that digestibility coefficients of OM, CP and NFE were significantly (P<0.05) higher for cows fed combination of Zn-CFM/CFM and Zn-CFM diets than those fed CFM diet. The improvements in digestibility of nutrients reflected better feeding values in terms of TDN and DCP for diets containing treated CFM than the untreated CFM diet.
Ruminal NH3-N and NPN concentrations were lower (P<0.05) for cows fed treated CFM by zinc sulphate than those fed untreated diet, indicating efficiency of the protection and/or better synchronization between availability of energy and release of NH3. On the other hand, ruminal true protein nitrogen (TPN) was higher (P<0.05) for cows fed combination of Zn-CFM/CFM and Zn-CFM diets than those fed CFM diet.
The concentration of plasma urea-N was decreased when cows were given protected CFM-protein than those fed unprotected one, whereas, the concentrations of total protein, albumin and globulin were increased.
Yields of milk, 4% fat-corrected milk (4%FCM) and its components were higher (P<0.05) when cows were fed combination of Zn-CFM/CFM or Zn-CFM diet than those fed CFM diet. Milk non-protein nitrogen (NPN) was lower on Zn-CFM/CFM or Zn-CFM diets. On the other hand, yields of true protein nitrogen, casein nitrogen, non- casein nitrogen and whey nitrogen in milk were higher (P<0.05) for cows fed protected protein than those fed unprotected protein.
Feed cost per one kg 4% FCM was lower for cows fed combination of Zn-CFM and CFM diet than those fed Zn-CFM diet or CFM diet. Accordingly, economic efficiency value was the best with Zn-CFM/CFM diet.
https://jappmu.journals.ekb.eg/article_82777_f52ec79dcaba9047773ee0685af90bd3.pdf
Zinc Sulphate
concentrate feed mixture
protected protein
lactating cows
eng
Mansoura University, Faculty of Agriculture
Journal of Animal and Poultry Production
2090-3642
2090-3723
2012-02-01
3
2
99
113
10.21608/jappmu.2012.82779
82779
Original Article
EFFECT OF DIETARY SUPPLEMENTATION WITH BIO-MOS® OR T-PROTPHYT 2000 WITH AND WITHOUT HORMONE TREATMENT ON PERFORMANCE, CHEMICAL COMPOSITION, AND HORMONE RESIDUES OF MONO-SEX NILE TILAPIA
A. Abdelhamid
1
Manal El-Barbary
2
Marwa Hasan
3
Animal Production Dept., Fac. Agric., Mans. Univ., Almansoura
National Institute of Fisheries and Oceanography, Cairo, Egypt.
Animal Production Dept., Fac. Agric., Mans. Univ., Almansoura
Two experiments were carried out. In both experiments, Nile tilapia fry (0.1 g initial bodyweight) were stocked into glass aquaria at 100 fry / aquarium in duplicate aquaria / treatment. The experimental diets were offered daily at a feeding rate of 10 % of the fish biomass for 21 days (hormone-treated diets as commercially done for sex reverse) followed by 8 or 12 weeks as experimental periods in the 1st and the 2nd experiments, respectively. Bio-Mos® and T-Protphyt 2000 were added to the 1st and the 2nd experiments, respectively at graded levels. The results obtained revealed no significant (P≥0.05) differences among treatments in both experiments concerning growth performance and chemical composition of the fish (except final length and fat % in both experiments, ash % in the 1st experiment and dry matter % in the 2nd experiment). However, the diet containing testosterone alone in the 1st experiment(T4) and that containing T-Protphyt 2000 at 4 g / Kg diet in the 2nd experiment reflected the best growth performance. The significant (P≤0.05) values in both experiments concentrated mainly in water holding capacity (WHC, where all treatments were higher than the control) and testosterone (the control was the highest). There were positive as well as negative correlations between the physico-chemical characteristics of the fish carcasses. In conclusion, we could recommend the use of 17 α-methyl testosterone at 60 mg / Kg diet for sex reverse during the early stage after the hatch and to increase the growth and survival besides decreasing fat content without any danger from the hormone residues. The dietary inclusion of Bio-Mos® was not beneficial, whereas the dietary inclusion of T-Protphyt 2000 at 4 g / Kg diet was positively effective in increasing the growth performance of the tilapia fry.
https://jappmu.journals.ekb.eg/article_82779_d36acb1437c3afc4e9949f4aedaffdfb.pdf
Mono-sex Nile tilapia
prebiotic
testosterone
Growth