eng
Mansoura University, Faculty of Agriculture
Journal of Animal and Poultry Production
2090-3642
2090-3723
2015-07-01
6
7
441
457
10.21608/jappmu.2016.52896
52896
Original Article
EFFECT OF DIETARY GRADED LEVEL OF SUBSTITUTING DISTILLERS DRIED GRAINS WITH SOLUBLES INSTEAD OF FISH MEAL IN TILAPIA DIET
A. Abdelhamid
1
A. El-Shebly
2
A. Sultan
3
Department of Animal Production, Faculty of Agriculture, University of Al-Mansourah
National Institute for Oceanography and Fisheries, Alexandria
National Institute for Oceanography and Fisheries, Alexandria
This study was carried out at El-Manzala Lake, Dakahlia Governorate, Egypt in order to investigate the effect of substitution of fish meal (FM) by graded levels of distillers dried grains with solubles (DDGS, being 25.0, 50.0, 75.0 and 100%) in fish diets on performanceof Nile tilapia (Oreochromisniloticus, initial body weight was 27.072 g/fish) reared in five floating net cages (12m×24m×3m) representing the dietary treatments and stocked into the experimental cages at a rate of 35 fish/m3 (about 30.000 fish/cage). All the experimental groups were fed the experimental diets at a rate of 3% of the live body weight of the fish.The experimental period lasted 123 days.Conclusively, it is safe and economic to feed Nile tilapia fish diets containing DDGS (cheaper than fish meal, FM) to replace up to 100 % of the FM (which is locally not enough available) in fish diets. So, the results of the present field (i.e. its results are reproducible) study recommend using DDGS in Nile tilapia diets at replacing rate of 25 % for the best growth performance or 100 % for the best economic efficiency.
https://jappmu.journals.ekb.eg/article_52896_53498b4f1e3c4e5454bb2d2c9c62fefa.pdf
Nile tilapia
DDGS
performance
Chemical composition
Blood
economy
eng
Mansoura University, Faculty of Agriculture
Journal of Animal and Poultry Production
2090-3642
2090-3723
2015-07-01
6
7
459
469
10.21608/jappmu.2016.52898
52898
Original Article
EFFECT OF DOUBLE OR PRE-SYNCHRONIZATION OVSYNCH PROTOCOLS ON FOLLICULAR DYNAMICS, PROGESTERONE PROFILE AND FIRST SERVICE PREGNANCY RATE IN TIMED ARTIFICIAL INSEMINATION IN FRIESIAN COWS
M. El-Harairy
1
M. El-Banna
2
M. Omar
3
Animal Production Department, Faculty of Agriculture, Mansoura University.
Animal Production Research Institute, Agricultural Research Center.
Animal Production Research Institute, Agricultural Research Center.
Aim of this study was to determine the effect of double-Ovsynch (DO) and pre-synchronization (PS) protocols on ovarian follicular dynamics, progesterone (P4) concentration and pregnancy rate at first postpartum AI in Friesian cows. Total of 44 lactating cows on 39-45 day post-partum (12 primiparous and 32 multiparous cows) were used in this study. Cows were divided into two similar groups (22 cows in each). Cows in G1 were pre-synchronized by two PGF2α (Estrumate) injections at 14 d interval (on days 42 and 56±3 post-partum), then initiate the Ovsynch-timed AI protocol after 12 days. Cows in G2 were injected on day 0 with 1st dose of GnRH (Receptal) on day 51±3 post-partum, with PGF2α on day 7 and 2nd dose of GnRH after 72 h, then initiate the Ovsynch-timed AI protocol after 7 days. Cows in both groups were treated with the same Ovsynch protocol: 1st GnRH on days 68±3 post-partum, PGF2α after 7 days, 2nd GnRH 56 h after PGF2α, and timed AI after 16 h. Cows were subjected to ultrasonography device to examine follicular number (FN) and diameter of dominant follicles (DF) as well as counting the number of corpora lutea (NCLs). Blood samples were collected to determine P4 in blood serum. Results showed that FN or NCLs/ovary on day 0 or during pre-synchronization treatment was not affected significantly by treatment. FN/ovary at 2nd GnRH of Ovsynch-breeding protocol was greater in G1 than in G2 (1.6 vs. 2.0 foll./ovary). However, NCLs and DF diameter during Ovsynch-breeding in G1 and G2 were not affected significantly by treatment. Concentration of P4 in blood serum of cows on days 0, pre-synch, 1st GnRH and PGF2 injections was not affected significantly by treatment. On day of 2nd GnRH injection, P4 concentration was higher (P<0.01) in G2 than in G1. Concentration of P4 was slightly higher (P>0.05) in pregnant than in non-pregnant cows during pre-synch protocol. Progesterone concentration on day 75 showed an opposite trend, being lower (P<0.05) in pregnant than in non-pregnant cows. Ovulation rate to 1st GnRH injection was insignificantly higher in G2 (88.9%) than in G1 (82.4%). While, pregnancy rate based on total number of treated and ovulated cows was insignificantly higher in G1 (45.5 and 71.4%) than in G2 (36.4 and 50.0%), respectively. Higher pregnancy rates was in association with higher P4 concentration (>3 ng/ml) on day 0 and at 1st GnRH of Ovsynch breeding protocol and lower P4 concentration (<1 ng/ml) at 2nd GnRH. Thus, pre-synchronization with Presynch-Ovsynch increased cyclicity and fertility of Frisian cows at first service postpartum in Frisian cows. However, Double-Ovsynch gave higher ovulation rate than presynch-Ovsynch.
https://jappmu.journals.ekb.eg/article_52898_2c3f34eacc93d25f4ca66b5dd38e9d72.pdf
bovine
Ovsynch
pre-synchronization
Pregnancy
progesterone
eng
Mansoura University, Faculty of Agriculture
Journal of Animal and Poultry Production
2090-3642
2090-3723
2015-07-01
6
7
471
481
10.21608/jappmu.2016.52902
52902
Original Article
FUNCTIONAL CHARACTERISTICS AND CHROMATIN DAMAGE OF BULL SPERMATOZOA AS AFFECTED BY DIFFERENT FREEZING STEPS
W. Khalil
1
M. El-Harairy
2
A. Zeidan
3
M. Hassan
4
W. Marei
5
Omnia Elsaeed
6
Department of Animal Production, Faculty of Agriculture, Mansoura University, Mansoura, 35516, Egypt.
Department of Animal Production, Faculty of Agriculture, Mansoura University, Mansoura, 35516, Egypt.
Animal Production Research Institute, Dokki, Giza, Egypt.
Animal Production Research Institute, Dokki, Giza, Egypt.
Department of Theriogenology, Faculty of Veterinary Medicine, Cairo University, Giza 12211, Egypt.
Department of Cytology and Histology, Faculty of Veterinary Medicine, Cairo University, Giza 12211, Egypt.
The present study aimed to define functional changes as sperm motility, dead spermatozoa and sperm abnormalities and chromatin damage of sperm by toluidine blue stain, acridine orange stain and flowcytometry during different stages of freezing semen. Semen ejaculates from five Friesian bulls were pooled, diluted in tris-citric acid extender, cooled to 4°C over 2 hours, equilibrated at 4°C for 4 hours and frozen immediately into a liquid nitrogen (-196°C). Samples were evaluated just after dilution (at 37°C), at 4 hours as equilibration period, and after thawing at 37°C for 30s in water bath. The obtained results showed that, the percentages of sperm motility were significantly (P<0.05) decreased, while the percentages of dead spermatozoa and sperm abnormalities revealed significantly (P<0.05) increased with the different stages of raw semen, diluted semen, cooled semen, equilibrated semen and frozen-thawed semen. In addition, the percentage of chromatin damage was significantly (P<0.05) higher during thawing after freezing using toludine blue, acridine orange and flowcytometry techniques as compared to other steps of freezing bull semen. In conclusion, the present study indicated marked difference in impairment of semen quality and chromatin damage during different steps of Friesian bull frozen spermatozoa, in particular, from equilibration to freezing/thawing.
https://jappmu.journals.ekb.eg/article_52902_57b2dce1db34276fe6a64cc92bf42c22.pdf
freezing
Bull semen
Chromatin
Toluidine blue
Acridine orange
Flowcytometry
eng
Mansoura University, Faculty of Agriculture
Journal of Animal and Poultry Production
2090-3642
2090-3723
2015-07-01
6
7
483
492
10.21608/jappmu.2016.52904
52904
Original Article
NUTRITIONAL EVALUATION OF ALGAE SUPPLEMENTATION AND IMPACT OF THEIR FEEDING ON MILK PRODUCTION AND COMPOSITION OF EWES
A. Hassan
1
Shyma El-Komy
2
By-Products Utilization Dept. Animal Production Research Institute, Agricultural Research center, Dokki, Giza, Egypt.
Animal production Dept., Faculty of Agriculture, Tanta University.
The present study was carried out to estimate digestion, rumen fermentation, milk yield and composition of lactating Barki ewes fed diets with or without different types of algae (Ulva lactuca and Pteroclandia capillacea) at levels of 0, 5 and 10 g/kg diet alone or a combination of both algae, at levels of 2.5 and 5 g/kg diet. Results showed that supplementation of both types of algae at a level of 5 g/kg for each improved (P≤0.05) the digestion of the experimental diets in term of increasing digestibility coefficients of nutrients, especially CP, CF and fiber fractions. On the other hand, digestibility coefficients of the cell wall constitutes were higher (P≤0.05) for diet supplemented with both types of algae at level of 2.5 or 5 g of each. Higher feeding values were obtained for diet supplemented with both algae, followed by those supplemented with each type of algae alone. The highest (P≤0.05) milk yield, milk fat and milk protein were detected by the same diets. Algae supplementation had no effect on milk lactose and ash percentages.
It could be recommended to supplement ewe diets with both algae strains (Ulva Lactuca and Pteroclandia Capillacea) at a level of 5 g from each in order to economically improve the performance of lactating ewes.
https://jappmu.journals.ekb.eg/article_52904_3593ba54e3dccd9d002562888474ff6b.pdf
algae
digestibility
rumen parameters
sheep
Milk
eng
Mansoura University, Faculty of Agriculture
Journal of Animal and Poultry Production
2090-3642
2090-3723
2015-07-01
6
7
493
505
10.21608/jappmu.2016.52906
52906
Original Article
INTENSIVE DIFFERENT STOCKING DENSITIES OF NILE TILAPIA, Oreochromis niloticus AND SILVER CARP, Hypophthalmichthys molitrix UNDER MONO-OR POLYCULTURE SYSTEMS IN FLOATING NET CAGES REARING IN MANZALA LAKE, Egypt
F. Khalil
1
F. Farrag
2
A. El Shebly
3
A. Behery
4
Animal Production Dept., Fac. Agric., Mans. Univ., Mans., Egypt.
Animal Production Dept., Fac. Agric., Mans. Univ., Mans., Egypt.
Fish culture Lab., National Institute of Oceanography and Fisheries, Egypt.
Animal Production Dept., Fac. Agric., Mans. Univ., Mans., Egypt.
This experiment was designed in order to study the effect of intensive rearing of mono-sex Nile tilapia and Silver carp under mono-or polyculture systems at different stocking densities in floating net cages. Fish were male mono-sex Nile tilapia with an average initial body weight (19.30 g) and Silver carp with an average initial body weight (73.6 g). The experimental fish were adapted for one week in floating net-cages and then distributed randomly into five experimental cages. The first cage was stocked with Nile tilapia, at a rate of 30 fish / m3, while the 2nd, the 3rd and 4th cages were stocked with different densities of Nile tilapia with Silver carp, at a rate of 30 fish / m3 and the fifth cage was stocked with Silver carp only at a rate of 6 fish / m3. All fish groups were feed the same artificial pelleted diet (except 5th group fed natural water food). The diets were contained of 26.58% crude protein and gross energy 410.35 Kcal/100g DM, and offered twice daily (at 8.30 a.m. and 15.00 p.m.). The feeding rate represented 4% of mass body weight during all experimental periods.
The main results showed that the best treatment was the monoculture of mono-sex Nile tilapia (30 fish / m3), then followed by the polyculture (88% Nile tilapia) and (12% Silver carp) in most of the examined traits as well as in the economic efficiency. The obtained results showed also that the intensive monoculture systems of silver carp had the lowest economic efficiency related to the only natural food in water only.
The present obtained results lead to the importance using the balanced pelleted complete diet for feeding tilapia fish especially under intensive cultured (monoculture); as well as, depending of green water for fed Silver carp in intensive monoculture. Also, showed the superiority of stocking densities in polyculture system were 88% and 12% for Nile tilapia and Silver carp, respectively As well as from environmentally point of view, it could be concluded that the controlling on different source of water pollution in Manazala Lake are very important to get high quality and safety fish production.
https://jappmu.journals.ekb.eg/article_52906_f5eb2a6fcea20f11330315aff6a6fede.pdf