Growth modeling and factors affecting growth traits in Madras red Sheep

DOI: 10.5958/0976-0555.2015.00004.7    | Article Id: B-2538 | Page : 20-25
Citation :- Growth modeling and factors affecting growth traits in Madras red Sheep.Indian Journal Of Animal Research.2015.(49):20-25
R. Ganesan*, P. Dhanavanthan, D. Balasubramanyam, P. Kumarasamy and Kiruthika ashwinarvind@sify.com
Address : Department of Statistics, Pondicherry University, Puducherry-605 014, India.

Abstract

Sheep rearing is an important livelihood for a large number of small and marginal farmers in India. Growth is a trait of interest in domestic animals. Information about growth model parameters is very useful for selection studies. In this paper, the growth of Madras Red sheep, a native breed of Tamil Nadu state in India, is studied through nonlinear growth models using data on average monthly body weight measurements of 1424 sheep from birth to 2 years of age born during 1996 to 2010. Sex of lamb, dam weight at lambing and year of birth were the significant non-genetic factors affecting body weight at birth, 3rd, 6th, 9th and 12th month. The birth weight and 9th month weight showed significant difference between the seasons. Average daily weight gain showed significant difference between sex of lamb, season of birth and year of birth while it showed significant difference between dam weight at lambing only for the period 3-6 months. Brody’s growth model described the average monthly growth remarkably well in males and females suggesting its usefulness in growth monitoring of Madras Red sheep.

Keywords

Average daily gain Body weight Growth curve Madras Red sheep Nonlinear regression.

References

  1. Akbas, Y.; Taskin, T.; Demiroren, E. (1999). Comparison of several models to fit the growth curves of Kivireik and Daglic male lambs. Turkish J.Vet. Animal Sci. 23: 537-544.
  2. Balasubramanyam, D. and Kumarasamy, P. (2011). Performance of Madras red sheep in Kancheepuram District. Indian Journal of Fundamental and Applied Life Sciences 1(2): 133-137.
  3. Balasubramanyam, D.; Jaishankar, S. and Sivaselvam, S.N. (2010). Performance of Madras red sheep under farmer’s flocks. Indian Journal of Small Ruminants 16(2): 217-220.
  4. Bates, D. M. and Watts, D. G. (1988). Nonlinear regression analysis and its applications, Wiley, New York.
  5. Bathaei, S.S. and Leroy, P.L. (1996). Growth and mature weight of Mehraban Iranian fat-tailed sheep. Small Rumin. Res. 22: 155-162.
  6. Blasco, A. and Gomes, E. (1993). A note on growth curves of rabbit lines selected on growth rate or litter size. Anim. Prod. 57: 332-334.
  7. Devendran, P.; Cauveri, D.; Murali, N.; Ravimurugan, T. and Gajendran, K. (2009). Growth efficiency of Madras red sheep under farmer’s flocks. Indian Journal of Small Ruminants. 16(2): 210-212.
  8. Efe, E. (1990). Growth curves. Cukurova University Graduate School and Applied Sciences, (PhD thesis), Adana, Turkey.
  9. Esenbuga, N.; Bilgin, O.C.; Macit, M. and Karaoglu, M. (2000). Growth curves in Awassi, Morkaraman and Tushin lambs. Ataturk Univ. The J. of Agric. Fac. 31: 37-41
  10. Fekedulegn, D.; Mac Siurtain, M.P. and Colbert, J.J. (1999). Parameter estimation of nonlinear growth models in forestry. Silva Fennica 33(4): 327-336.
  11. Gbangboche. A. B.; Glele-Kakai, R.; Salifou,S.; Albuquerque, L. G. and Leroy, P. L. (2008). Comparison of nonlinear growth models to describe the growth curve in West African Dwarf sheep. Animal 2(7): 1003-1012.
  12. Kvalseth. (1985). Cautionary note about R2. Amer Stat, 39: 279-285.
  13. Mandal, A.; Pant, K.P.; Nandy, D.K.; Rout, P.K. and Roy, R. (2003). Genetic analysis of growth traits in Muzaffarnagari sheep. Tropical Animal Health and Production 35: 271-284.
  14. Moore, A.J. (1985). A mathematical equation for animal growth from embryo to adult. Anim. Prod. 47: 201-207.
  15. Omer, C. Bilgin; Ebru Emsen and Michael E. Davis (2004). Comparison of nonlinear models for describing the growth of scrotal circumference in Awassi male lambs. Small Ruminant Research 52: 155-160.
  16. Shah MH. and Khan FU. (2004). Establishment of a Nucleus Flock of Highest Genetic Merit for Breeding, Production and Propagation. Annual Report, Livestock Production Research Institute, Bahadurnagar, Okara, Pakistan.
  17. Stobart, R.H.; Bassett, J.W.; Cartwright, T.C. and Blackwell, R.L. (1986). An analysis of body weights and maturing patterns in western range ewes. Journal of Animal Science 63: 729-740.
  18. Topal, M.; Ozdemir, M.; Aksakal, V.; Yildiz, N. and Dogru, U. (2004). Determination of the best nonlinear function in order to estimate growth in Morkaraman and Awassi lambs. Small Rumin. Res. 55: 229-32.

Global Footprints