scholarly journals Effect of High Environmental Temperature on Egg Production, Serum Lipoproteins and Follicle Steroid Hormones in Laying Hens

2011 ◽  
Vol 48 (3) ◽  
pp. 207-211 ◽  
Author(s):  
Nami Yoshida ◽  
Masanori Fujita ◽  
Munehiro Nakahara ◽  
Teppei Kuwahara ◽  
Shin-Ichi Kawakami ◽  
...  
Keyword(s):  
Steroid Hormones ◽  
Egg Production ◽  
Environmental Temperature ◽  
Laying Hens ◽  
Serum Lipoproteins ◽  
High Environmental Temperature

scholarly journals Effects of Added Dietary Fat and Phosphorus on the Performance and Egg Quality of Laying Hens Subjected to a Constant High Environmental Temperature

2001 ◽  
Vol 80 (12) ◽  
pp. 1695-1701 ◽  
Author(s):  
N. Usayran ◽  
M.T. Farran ◽  
H.H. Awadallah ◽  
I.R. Al-Hawi ◽  
R.J. Asmar ◽  
...  
Keyword(s):  
Dietary Fat ◽  
Environmental Temperature ◽  
Laying Hens ◽  
Egg Quality ◽  
High Environmental Temperature

scholarly journals Assessment of Residual Feed Intake and Its Relevant Measurements in Two Varieties of Japanese Quail (Coturnix coturnix japonica) under High Environmental Temperature

2019 ◽  
Author(s):  
Moataz M. Fathi ◽  
Ibrahim Al-Homidan ◽  
Tarek A. Ebeid ◽  
Ahmed Galal ◽  
Osama K. Abou-Emera
Keyword(s):  
Body Weight ◽  
Japanese Quail ◽  
Feed Intake ◽  
Egg Production ◽  
Environmental Temperature ◽  
Egg Quality ◽  
Body Weight Gain ◽  
Egg Mass ◽  
Initial Population ◽  
High Environmental Temperature

Three hundred ten 12-wek-old laying quails (155 each) were randomly selected from the initial population and kept in individual battery cages. The measurements of growth and egg production were determined to derive RFI. The relationship between RFI and egg quality, blood parameters and carcass characteristics was also determined. The results indicated that the gray quails had significantly higher egg mass and lower broken eggs compared to the white quails. A significant increase for eggshell strength and shell % was found in eggs produced from gray quails compared to white counterparts, although the shell thickness was the same. The results of multiple regression analysis clearly identified a significant effect of metabolic body weight and egg mass in computing expected feed intake rather than body weight gain in both varieties of Japanese quails. Strongly positive correlation between RFI and feed intake in both gray and white quail varieties was found. The same trend was also observed for feed conversion ratio (FCR). Therefore, including RFI in selection criteria of Japanese quail to improve FCR under high environmental temperature is highly recommended.

scholarly journals Assessment of Residual Feed Intake and Its Relevant Measurements in Two Varieties of Japanese Quails (Coturnixcoturnix japonica) under High Environmental Temperature

Animals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 299
Author(s):  
Moataz M. Fathi ◽  
Ibrahim Al-Homidan ◽  
Tarek A. Ebeid ◽  
Ahmed Galal ◽  
Osama K. Abou-Emera
Keyword(s):  
Body Weight ◽  
Feed Intake ◽  
Egg Production ◽  
Environmental Temperature ◽  
Residual Feed Intake ◽  
Egg Mass ◽  
Initial Population ◽  
Strong Positive Correlation ◽  
Japanese Quails ◽  
High Environmental Temperature

Three hundred and ten 12-week-old laying Japanese quails (Coturnixcoturnix japonica) from gray and white varieties (155 each) were randomly selected from the initial population and kept in individual battery cages. The measurements of growth and egg production were determined to derive residual feed intake (RFI). The relationship between RFI and egg quality, blood parameters, and carcass characteristics was also determined. The results indicated that the gray quails had significantly higher egg mass and lower broken eggs compared to the white quails. A significant increase of eggshell strength and shell percentage was found in eggs produced from gray quails compared to their white counterparts, although their shell thickness means weresimilar. The results of multiple regression analysis clearly identified a significant effect of metabolic body weight and egg mass for the computation of expected feed intake, rather than body weight gain, in both varieties of Japanese quails. A strong positive correlation between RFI and feed intake in both gray and white quail varieties was found. The same trend was also observed for feed conversion ratio (FCR). Therefore, including RFI in the selection criteria of Japanese quails in order to improve FCR under high environmental temperature is highly recommended.

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