Daily Energy Allotments and Performance of Broiler Breeders.

Attia, Youssef A.; Burke, W. H.; Yamani, K. A.; Jensen, L. S.

doi:10.3382/ps.0740261

Cited by 54 publications

(48 citation statements)

References 17 publications

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“…Similarly, the availability of swimming water may have an effect on semen quality considering the fact that drakes in PS and SIS with access to swimming water tend to produce better semen characteristics than drakes in an IS system (Etuk et al, 2006). The lack of agreement in the results of SQF or testosterone concentration and fertility of geese could be attributed to multi-factors affecting fertility besides semen quality traits, such as copulation, hygienic condition and pre-incubation mortality (Attia et al, 1995).…”

Section: Discussionmentioning

confidence: 99%

Effect of different managerial systems on productive and reproductive traits, blood plasma hormones and serum biochemical constituents of geese

El-Hanoun

Attia

Gad

et al. 2012

Animal

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A flock of 117, 10-month-old Egyptian geese consisting of 90 females and 27 males were utilized in this investigation. Birds were randomly divided into three equal groups, each made up of three replicates of 10 females and 3 males each. The first group was kept under a pasture system (PS) and allowed to swim in water ducts during the daytime (PS) and kept inside the house during the night. The second group of birds were kept in confinement in a house and fed ad libitum on a commercial feed (intensive system (IS)). Birds in the third group (semi-intensive system (SIS)) were released from the house for 6 h a day and given access to the pasture and water ducts. Each group was housed in three pens (replicates) in the SIS. They were given ad libitum access to the commercial feed when in the house. Each pen measured (2 3 3 m 2 ). Natural mating was practiced during the period from November to the end of May. BW of geese under ISS was significantly (P < 0.05) higher than those under PS and SIS. Egg number, weight and mass of geese in the SIS system were significantly (P < 0.05) greater than those of geese in the PS and IS systems. Fertility and hatchability percentages were significantly (P < 0.05) greater in the PS (84.2% and 88.6%) than in the IS (77.5% and 82.8%) and SIS systems (80.7% and 85.5%). Shell weight and thickness were significantly (P < 0.05) better in the IS and SIS systems than in the PS system. Geese in the PS and SIS systems exhibited significantly higher plasma estradiol-17 and progesterone than those in the IS. Testosterone was significantly higher in IS than in the other systems. Semen quality factor was significantly higher in the PS and SIS systems than in the IS system. Carcass weight was significantly greater in IS and SIS geese than in PS geese, but the PS system resulted in a decreased percentage skin, abdominal fat and liver. Total amount of meat produced per geese was significantly greater in the SIS than in the IS system and greater in the IS than in the PS system.

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Section: Discussionmentioning

confidence: 99%

Effect of different managerial systems on productive and reproductive traits, blood plasma hormones and serum biochemical constituents of geese

El-Hanoun

Attia

Gad

et al. 2012

Animal

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“…Before being opened, the eggs were weighed and the egg shape index was measured following Al-saffar et al (2013). The shell, yolk and albumen were also weighed (egg shells were washed, the inner egg shell was separated and air dried until constant weight before weighing) to measure shell (Attia et al, ,1995Burke and Attia, 1994), yolk (Attia et al, 2013b) and albumen index (Al-saffar et al, 2013). The Haugh unit score was calculated following Al-saffar (et al (2013).…”

Section: Methodsmentioning

confidence: 99%

“…The increase of egg weight during a normal production cycle is associated with an age-related change in the proportion of the different components of the egg (Travel, 2011;Attia et al, 1995). In general, the percentage contribution made by the yolk increases throughout laying resulting in a decrease in the proportion of yolk to albumen over time, while the percentage of eggshell remains relatively consistent (Ternes et al, 1994;Attia et al, 2013aAttia et al, , 2013b.…”

Section: Effect Of Weekmentioning

confidence: 99%

Effect of Group Size on Performance and Egg Quality of Laying Hens During 20 to 36 Weeks of Age

Bovera

Iannaccone

Piccolo

et al. 2014

Italian Journal of Animal Science

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The aim of this study was to improve knowledge on the effect of group size on productive performance and egg quality of hens raised in furnished cages equally designed. A total of 520, 15-week-old Lohmann Brown laying hens were divided into 2 groups to have a similar initial body weight (average 1392±16.3 g). The cages of S25 group (240 L x 78 W x 50 H cm, 749 cm 2 /hen) hosted a total of 200 hens, while those of S40 group (462 L x 65 W x 50 H, 751 cm 2 /hen) included 320 birds. Experimental data were recorded after an adaptation period of 5 weeks (20 to 36 weeks of age). Hens were submitted to 15 h of light/d. The average temperature inside the building was 24.6±2.5°C over the entire experimental period with higher values at 24, 26, 28 and 30 weeks of age. The relative humidity recorded inside the building was 55% at week 20 and 60% all through the experimental period. Hens raised from S40 group had lower percentage of egg production (84.91 vs 88.90%, P<0.01) and higher feed conversion ratio (2.70 vs 2.25, P<0.0001) than S25 group. The percentage of eggs laid out of the nest was higher in S25 than S40 group (0.26 vs 0.19%, P<0.01). As expected, the week of age affected almost all the parameters (feed intake, body weight, laying percentage, egg weight, yolk, shell and albumen indexes, shell thickness, Haugh unit). However, the effect of group size was particularly evident during the hot period.

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“…There was an apparent association between egg yolk fatty acid profiles and fatty acid profiles of BMA. The relationship between dietary intake of lipids/fatty acids and lipid profile of meat and eggs has been reported (Attia et al, 1995;El-Deek et al, 1997).…”

mentioning

confidence: 99%

Effect of different dietary concentrations of brown marine algae (Sargassum dentifebium) prepared by different methods on plasma and yolk lipid profiles, yolk total carotene and lutein plus zeaxanthin of laying hens

Al‐Harthi¹,

El-Deek

2012

Italian Journal of Animal Science

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The effect of different concentrations (0%, 3% and 6%) of brown marine algae (BMA, Sargassum dentifebium) prepared according to different methods (sun-dried, SBMA; boiled, BBMA; autoclaved, ABMA) on plasma and yolk lipid profiles, carotene, and lutein plus zeaxanthin in egg yolks was studied in hens aged from 23 to 42 weeks (30 hens per treatment). We determined the fatty acid profiles in BMA and in the egg yolk of hens fed different levels of BMA prepared according to different methods. In addition, plasma and yolk lipid profiles, yolk total carotene, and lutein plus zeaxanthin were determined at week 42 of age. Plasma and yolk cholesterol were significantly lower in groups fed diets containing either 3% or 6% BMA than in the control group, but high-density lipoprotein (HDL) significantly decreased as BMA concentration increased. There was a significant similar decline in yolk triglycerides with inclusion of either 3% or 6% BMA in the laying hen diet. Palmitic acid was the main saturated fatty acid (SFA) found in BMA and oleic acid (omega-9) and linoleic acid (omega-6) were the main unsaturated fatty acids (UFA), while there was a significant increase in palmitic acid in egg yolk when BMA was included at 6%. There was a significant increase in oleic acid (omega-9) when feed containing 3% BMA was given compared to the control group, but this decreased with a further increase in BMA. Linoleic acid (omega-6) also significantly decreased with inclusion of either 3% or 6% BMA. There was a significant increase in total carotene and lutein plus zeaxanthin in the laying hen eggs as a result of feeding diets containing 3% and 6% BMA.

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Daily Energy Allotments and Performance of Broiler Breeders.

Cited by 54 publications

References 17 publications

Effect of different managerial systems on productive and reproductive traits, blood plasma hormones and serum biochemical constituents of geese

Effect of different managerial systems on productive and reproductive traits, blood plasma hormones and serum biochemical constituents of geese

Effect of Group Size on Performance and Egg Quality of Laying Hens During 20 to 36 Weeks of Age

Effect of different dietary concentrations of brown marine algae (Sargassum dentifebium) prepared by different methods on plasma and yolk lipid profiles, yolk total carotene and lutein plus zeaxanthin of laying hens

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