This study was conducted to determine the effect of feeding different level of restricted feed wi... more This study was conducted to determine the effect of feeding different level of restricted feed with different forms of zinc(Zn) on productive performance, egg quality traits and economic efficiency of Mandarah (Egyptian local developed strain) laying hens. A total number of 270 laying hens + 27 cocks, 24 weeks old were randomly taken to be similar in (1228.0 ±44.0 g) in the study. Birds were randomly divided into nine experimental groups,(30 hens + 3 cocks in each group) and each group was contained three replicates (10 hens+ 1 cock / replicate). The experimental groups involved a3x3factorial arrangement, 3 zinc forms (control, organic zinc and Nano-Zn) and 3 levels of restricted system groups (ad libitum, 90 % and 80 % / hen / day) were fed a balanced basal diet without supplemented zinc as a control or supplemented with 50 mg Nano zinc /Kg diet or 50 mg zinc from zinc methionine /Kg diet, respectively),during the experimental period lasted six month. The obtained results showed th...
The objective of the present study was to examine the effects of dietary supplementation with two... more The objective of the present study was to examine the effects of dietary supplementation with two sources of selenium (Se), organic (Org-Se) and Nano-Se without or with vitamin E (Vit-E) on growth performance and Se metabolism in New Zealand White (NZW) growing rabbits. In a factorial experimental design (2x3), ninety weaned NZW rabbits of 5 weeks old and with average body weight, 579.5 ± 5.53g were used in the study for 56 days. Rabbits were randomly distributed into 6 experimental groups and fed the following six diets : (1) control Basal diet without any supplementation,
A total number of 128 laying pullets and 16 cocks of Matrouh local strain at 140 days of age (20-... more A total number of 128 laying pullets and 16 cocks of Matrouh local strain at 140 days of age (20-24 weeks) were randomly divided into four treatment groups (32 females and 4 males / group) in completely randomized design. The injections were carried out once a week for a month (4 times injection) before sexual maturity from 20 to 24 weeks of age. The 1 st treatment group of pullets was injected with a saline solution 0.9% and was considered as a control group. The 2 nd group, was administrated into the mouth, with 0.2 ml of distill water, which containing 200 μg royal jelly (RJ) /kg BW. While, the 3 rd and 4 th groups were injected subcutaneously with 0.2 ml of saline solution 0.9%, which containing 200 μg/Kg BW of each of gibberellic acid (GA 3) or testosterone (Ts), respectively. The obtained results revealed that the final body weight, daily feed consumption (DFC) and feed conversion ratio (FCR) of Matrouh pullets treated with 200 μg Ts, or GA 3 , /kg BW, as well as egg production rate (EPR), egg mass (EM) and egg weight (EW) were improved significantly (P≤0.05) as compared with the control at the whole experimental period (24-48 weeks of age) compared to the control group. The lowest mortality rate (MR) 9.38 and 12.50% was significantly with Ts and RJ treated groups, respectively. While, the highest MR (%) was 18.75 and 15.63% recorded in GA 3 and control groups, respectively in laying pullets, during the total period (24-48 weeks of age). Moreover, egg shape index and egg albumin index were significantly (P<0.05) increased for pullets injected 844 GOMAA et al. with 200 μg GA 3 and Ts/kg BW, respectively when compared to the control group, during the period from 24-48 weeks of age. However, results obtained revealed that treated pullets with Ts and RJ increased significant (P<0.05) egg albumin weight % than the control group in the same period. The best economic efficiency and the highest net return were recorded with GA 3 followed by the RJ group, while the control group recorded the lowest values during the whole experimental periods (20-48 weeks of age). Conclusively, pullets treated with 200 μg GA 3 or RJ /kg BW during pre-sexual maturity of age (20-24 weeks) were recommended for improving most of the productive performance, as well as egg quality, highest net return and economic efficiency of Matrouh local strain during summer season in Egypt.
Abstract. Recently, much work has been done to record the diurnal peak of does receptivity. It wa... more Abstract. Recently, much work has been done to record the diurnal peak of does receptivity. It was found that the highest was in the morning and before allowing suckling. Such studies suggested that mating should be achieved in the morning or before suckling to avoid the negative effect of the circadian peak of prolactin on receptivity that occur around 15.00 to 19.00 h and after each suckling. Some cases of pseudo-pregnancy might be prevented by double mating; the second mating should be within at most five hours after the first, since mating later than this would have no effect. Total parturition time would be 10–14 minutes for a large litter and 5–7 minutes for an average litter, although parturition could be induced to allow prompt attention to does with poor maternal instinct and to those kindle for the first time kindling and to avoid situations such as: kindling at night or in cold weather and/or to avoid the variability in gestation periods (29 to 34 days). Mother-litter sep...
The domestic rabbit is deprived of the protection of burrows and of a social hierarchy and live i... more The domestic rabbit is deprived of the protection of burrows and of a social hierarchy and live in a limited space which is a fraction of a metre of a hard sanitized space, removed from odours, markers and social interaction. Hot climate was the main cause for abnormal maternal and sexual behaviour. Exposure to high ambient temperature induces rabbits to try to balance their excessive heat load by using different means. The doe that was capable to produce 10 litters a year may give only 4 to 5 litters in hot climate Noise in rabitries causes adverse effects including nervous and behavioural abnormalities and can cause a startled response and traumatic injuries to limbs and back. Particularly, most concern about noise effects has traditionally focused on impairment of reproductive and maternal behaviours, although few controlled studies have been done to support the observations of animal caretakers that noise inhibits production. Moon phases are one of the main causes of abnormal se...
This study was conducted to determine the effect of feeding different level of restricted feed wi... more This study was conducted to determine the effect of feeding different level of restricted feed with different forms of zinc(Zn) on productive performance, egg quality traits and economic efficiency of Mandarah (Egyptian local developed strain) laying hens. A total number of 270 laying hens + 27 cocks, 24 weeks old were randomly taken to be similar in (1228.0 ±44.0 g) in the study. Birds were randomly divided into nine experimental groups,(30 hens + 3 cocks in each group) and each group was contained three replicates (10 hens+ 1 cock / replicate). The experimental groups involved a3x3factorial arrangement, 3 zinc forms (control, organic zinc and Nano-Zn) and 3 levels of restricted system groups (ad libitum, 90 % and 80 % / hen / day) were fed a balanced basal diet without supplemented zinc as a control or supplemented with 50 mg Nano zinc /Kg diet or 50 mg zinc from zinc methionine /Kg diet, respectively),during the experimental period lasted six month. The obtained results showed th...
The objective of the present study was to examine the effects of dietary supplementation with two... more The objective of the present study was to examine the effects of dietary supplementation with two sources of selenium (Se), organic (Org-Se) and Nano-Se without or with vitamin E (Vit-E) on growth performance and Se metabolism in New Zealand White (NZW) growing rabbits. In a factorial experimental design (2x3), ninety weaned NZW rabbits of 5 weeks old and with average body weight, 579.5 ± 5.53g were used in the study for 56 days. Rabbits were randomly distributed into 6 experimental groups and fed the following six diets : (1) control Basal diet without any supplementation,
A total number of 128 laying pullets and 16 cocks of Matrouh local strain at 140 days of age (20-... more A total number of 128 laying pullets and 16 cocks of Matrouh local strain at 140 days of age (20-24 weeks) were randomly divided into four treatment groups (32 females and 4 males / group) in completely randomized design. The injections were carried out once a week for a month (4 times injection) before sexual maturity from 20 to 24 weeks of age. The 1 st treatment group of pullets was injected with a saline solution 0.9% and was considered as a control group. The 2 nd group, was administrated into the mouth, with 0.2 ml of distill water, which containing 200 μg royal jelly (RJ) /kg BW. While, the 3 rd and 4 th groups were injected subcutaneously with 0.2 ml of saline solution 0.9%, which containing 200 μg/Kg BW of each of gibberellic acid (GA 3) or testosterone (Ts), respectively. The obtained results revealed that the final body weight, daily feed consumption (DFC) and feed conversion ratio (FCR) of Matrouh pullets treated with 200 μg Ts, or GA 3 , /kg BW, as well as egg production rate (EPR), egg mass (EM) and egg weight (EW) were improved significantly (P≤0.05) as compared with the control at the whole experimental period (24-48 weeks of age) compared to the control group. The lowest mortality rate (MR) 9.38 and 12.50% was significantly with Ts and RJ treated groups, respectively. While, the highest MR (%) was 18.75 and 15.63% recorded in GA 3 and control groups, respectively in laying pullets, during the total period (24-48 weeks of age). Moreover, egg shape index and egg albumin index were significantly (P<0.05) increased for pullets injected 844 GOMAA et al. with 200 μg GA 3 and Ts/kg BW, respectively when compared to the control group, during the period from 24-48 weeks of age. However, results obtained revealed that treated pullets with Ts and RJ increased significant (P<0.05) egg albumin weight % than the control group in the same period. The best economic efficiency and the highest net return were recorded with GA 3 followed by the RJ group, while the control group recorded the lowest values during the whole experimental periods (20-48 weeks of age). Conclusively, pullets treated with 200 μg GA 3 or RJ /kg BW during pre-sexual maturity of age (20-24 weeks) were recommended for improving most of the productive performance, as well as egg quality, highest net return and economic efficiency of Matrouh local strain during summer season in Egypt.
Abstract. Recently, much work has been done to record the diurnal peak of does receptivity. It wa... more Abstract. Recently, much work has been done to record the diurnal peak of does receptivity. It was found that the highest was in the morning and before allowing suckling. Such studies suggested that mating should be achieved in the morning or before suckling to avoid the negative effect of the circadian peak of prolactin on receptivity that occur around 15.00 to 19.00 h and after each suckling. Some cases of pseudo-pregnancy might be prevented by double mating; the second mating should be within at most five hours after the first, since mating later than this would have no effect. Total parturition time would be 10–14 minutes for a large litter and 5–7 minutes for an average litter, although parturition could be induced to allow prompt attention to does with poor maternal instinct and to those kindle for the first time kindling and to avoid situations such as: kindling at night or in cold weather and/or to avoid the variability in gestation periods (29 to 34 days). Mother-litter sep...
The domestic rabbit is deprived of the protection of burrows and of a social hierarchy and live i... more The domestic rabbit is deprived of the protection of burrows and of a social hierarchy and live in a limited space which is a fraction of a metre of a hard sanitized space, removed from odours, markers and social interaction. Hot climate was the main cause for abnormal maternal and sexual behaviour. Exposure to high ambient temperature induces rabbits to try to balance their excessive heat load by using different means. The doe that was capable to produce 10 litters a year may give only 4 to 5 litters in hot climate Noise in rabitries causes adverse effects including nervous and behavioural abnormalities and can cause a startled response and traumatic injuries to limbs and back. Particularly, most concern about noise effects has traditionally focused on impairment of reproductive and maternal behaviours, although few controlled studies have been done to support the observations of animal caretakers that noise inhibits production. Moon phases are one of the main causes of abnormal se...
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