Effect of age and sex on dressing percentage and its relationship to tibia length in commercial broilers
DOI:
https://doi.org/10.54172/mjsc.v13i1.651Abstract
A total number of 57 birds from commercial broiler strain (30 males and 27 females) were used to investigate the influence of age and sex on dressing percentage and its relation to tibia length in commercial broiler. The results of this study showed that no significant differences between males and females in all studied traits , but the overall means were higher in males than in females except dressing percentage and tibia length . The age was significantly affect (p<0.05) the dressing percentage, but not the tibia length, while the weight increased with advanced age. The correlation coefficient between body live-weight and experimental traits was high and positive in both sex, but dressing percentage decreased with age at 40 and 58 days in males. Meanwhile, correlation coefficient was highly positive between tibia length and the studied traits in both sexes but it was negative in females aged 40 days. From this study, it was concluded that, there is a relationship between tibia length and the studied traits specially in males , however further work is needed.
Downloads
References
الراوي ، خ. وخلف اللة ، ع. م. (1980) . تصميم وتحليل التجارب الزراعية . جامعة الموصل .
يحيى ، م. وأبو العنين ، م. (1987) . تربية وإنتاج الدواجن وأمراضها وطرق علاجها . دار المطبوعات الجديدة (طنطا / مصر) .
غايتون ، س وهول ، ي )1997( . الفسيولوجيا الطبية . ترجمة صادق الهلالي ، الطبعة التاسعة . منظمة الصحة العالمية . المكتب الاقليمى للشرق الأوسط .
عبد الله ، م.خ. و يحيى ، ن. ص. (1997) . وراثة الدواجن وتربيتها . منشورات جامعة عمر المختار .
Brodbent, L.A., B.J. Wilson and C. Fisher., ( 1981) . The composition of the broiler chicken at 56 days . Out put components and chemical composition. British poultry Sci. 22:385- 390.
Grey, T.C., D. Robinson and J.M. Jones., ( 1982) . Effect of age and sex on the eviscerated yield muscle and edible offal of a commercial broiler strain. British poultry Sci. 23: 289- 298.
Hafez, E.S., and F. Dyer., (1969). Animal growth and nutrition. LEA and Febigen, Philadelphia.
Lawrence, L., (1980) . Growth in animals .Bulterwarth, London.
Merritt, E.S., (1968). Genetic parameters estimates for growth and reproductive traits in a randombred control strain of meat type fowl. Poultry Science 47:190-199.
Moran, E.T., (1977) . Growth and meat yield in poultry. In: Bo1oman, K.N.,and B.J.Wilson, editors. Growth and Poultry meat production. British Poultry Sci., Ltd., Edinburgh.
Rondelli, Martinez, O. and Garcia, P.T., (2003). Sex effect on productive parameters, carcass and body fat composition of two commercial broiler lines. Rev.Bras. Cinec. Avic. Vol.5 No.3.
Rose, N., P. Constantin and C. Leterrire, C., (1996) . Sex differences in bone growth in broiler chicken. Growth& development aging 60,2.
Rose,S.P., (1997) .Principles of poultry science. CAB international, UK .
Singh, S.P., and E.O Essary., (1974) . Factors influencing dressing percentage and tissue composition of broiler. Poultry Sci. 53:2143-2174.
Downloads
Published
How to Cite
License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Copyright of the articles Published by Almukhtar Journal of Science (MJSc) is retained by the author(s), who grant MJSc a license to publish the article. Authors also grant any third party the right to use the article freely as long as its integrity is maintained and its original authors and cite MJSc as original publisher. Also they accept the article remains published by MJSc website (except in occasion of a retraction of the article).