Estimation of Body Weight of Nigerian Local Turkeys from Zoometrical Measurements at 4, 8 and 12 Weeks of Age
body weight, coefficient of determination, regressor, turkeys, zoometrical measurements., zoometrical measurements
Abstract
In Nigerian markets, birds are sold on face value and not by actual body weight which prompted this experiment. This experiment was conducted to predict body weight from zoometrical measurements (body length, breast girth and keel length) in Nigerian local turkeys at different ages. A total of 250 poults were used for the study which lasted for 12 weeks. Measurements of body length, breast girth and keel length were regressed against body weight using linear, quadratic and cubic functions. The coefficient of determination (R 2 ) obtained varied from 24.62% to 81.93% for the three functions. Cubic function had the highest R 2 values for all the zoometrical measurements, while linear function had the least R 2 values in all the three age groups. The highest R 2 value (81.93%) was obtained at the 8 th week. Best accuracy of prediction was obtained with breast girth in all the age groups. From the results obtained in this study, body weight of turkeys can be predicted from any of the body length, keel length and breast girth with best accuracy of prediction obtained with cubic function and breast girth as the regressor.
Downloads
How to Cite
References
M. Adeleke, S. Peters, A. Bamgbose, F. Adebambo (2004) Estimation of body weight from linear body measurements among crossbred egg-type chickens. 88-91.
F. Adeniji, K. Ayorinde (1990) Prediction of body weight of broilers at different ages from linear body measurements. 17, 41-47.
S. Amao, L. Ojedapo, S. Oyewumi, S. Ameen (2011) Estimation of body weight from linear body measurements in Wadi Ross meat type chicken in derived savannah zone of Nigeria. 9-12.
S. Banerjee (2011) Estimation of Body Weight at Different Ages Using Linear and Some non Linear Regression Equations in a Duck Breed Reared in Hot and Humid Climate of Eastern India. 6(4), 201-204.
V. Congelosi, P. Taylor, P. Rice (1983) Basic Statistics: A Real World Approach. 3rd edition. St. 315-336.
N. Emuron, H. Magala, D. Kugonza, F. Kyazze, C. Kyarisiima (2010) Factors influencing the trade of local chickens in Kampala city markets. (4). http://www.lrrd.org/lrrd22/4/cont2204.htm
H. Fitzhugh (1976) Analysis of Growth Curves and Strategies for Altering Their Shape. 42, 1036-1040.
A. Ilori, S. Peters, C. Ikeobi, A. Bamgbose, C. Isidahomen, M. Ozoje (2010) Comparative Assessment of Growth in Pure and Crossbred Turkeys in a Humid Tropical Environment. 9(4), 368-375. https://doi.org/10.3923/ijps.2010.368.375
R. Mason, D. Lind, W. Marchal (1983) Statistics: An Introduction. New York Harcourt Brace Jovanovich. 368-383.
R. Mendes, A. Karabayir, A. Pala (2005) Path analysis of the relationship between various body measures and live weight of American Bronze turkeys under three different lighting program. 11, 184-188.
E. Nwachukwu, C. Nwankwo, C. Akomah (2011) Early growth performance and economic production of crossbred Normal feather, Naked neck and Frizzle pullets. 74-77.
O. Olowofeso (2009) Phenotypic correlations and prediction of body weight and body size parameters in broiler chickens. Journal of Applied Agricultural Research. Vol. 71-76. http://www.jaar-ng.org
T. Richard (1990) Interpretation of the Correlation Coefficient: A basic Review. 1, 35-39.
SAS (1999) Statistical Analysis System.
A. Schwabe, S. Hall (1989) Distocia in nine British breeds of cattle and its relationship to the dimensions of the dam and calf. 125, 636-689.
J. Semakula, P. Lusembo, D. Kugonza, D. Mutetikka, J. Ssennyonjo, M. Mwesigwa (2011) Estimation of live body weight using zoometrical measurements for improved marketing of indigenous chicken in the Lake Victoria basin of Uganda. 170. http://www.lrrd.org/lrrd23/8/sema23170.htm
M. Topal, M. Macit (2004) Prediction of body weight from body measurements in Morkaraman sheep. J. Appl. Anim. 25, 97-100.
A. Yakubu (2010) Path coefficient and path analysis of body weight and biometric traits in Yankasa lamps. Slovak J. Anim. 43(1), 17-25.
A. Yakubu, A. Abdullah, M. Ari, D. Ogah (2005) Studies on live weight and linear body measurements of West African Dwarf sheep in North Central Nigeria. 1, 37-45.
Published
2013-07-15
Issue
Section
License
Copyright (c) 2013 Authors and Global Journals Private Limited
This work is licensed under a Creative Commons Attribution 4.0 International License.