Advanced SearchSearch Tips
The Effects of Docking on Growth Traits, Carcass Characteristics and Blood Biochemical Parameters of Sanjabi Fat-tailed Lambs
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
The Effects of Docking on Growth Traits, Carcass Characteristics and Blood Biochemical Parameters of Sanjabi Fat-tailed Lambs
Nooriyan Sarvar, E.; Moeini, M.M.; Poyanmehr, M.; Mikaeli, E.;
  PDF(new window)
The effects of docking on growth traits, fattening performance, carcass characteristics and blood biochemical parameters were investigated using 24 fat-tailed Sanjabi single-born male lambs raised from a large commercial sheep herd. The lambs were randomly divided into two groups. One group (n = 12) were docked at two days of age with rubber-rings using an elastrator. The second group (n = 12) were left intact. After weaning (90 days), all lambs were moved to rustic rangelands for 40 days. Then all the lambs were fed concentrates ad libitum for 60 days during the fattening period. Growth traits, body weight and average daily gain (kg) were recorded at the end of the weaning and fattening periods. Blood biochemical parameters including urea, total protein, glucose, triglycerides, cholesterol, low-density lipoproteins (LDL) and high-density lipoproteins (HDL) were measured during the fattening period. Finally, at the end of the fattening period, eight lambs (4 intact and 4 docked lambs) were slaughtered in order to determine carcass characteristics. Fat-tail docking had no effect (p>0.05) on lamb growth from birth to weaning. Body weight and average daily gain of docked lambs were significantly higher (p<0.05) than for intact lambs at the end of the fattening period. There was no difference in carcass measurements between the two groups, except for chest depth and leg weight which were higher (p<0.05) in docked lambs. During the fattening period, cholesterol and LDL of docked lambs were less than in intact lambs (p<0.05). The current results indicated that docking with rubber rings causes an improvement in growth traits during the fattening period and leads to desirable carcass characteristics compared to intact lambs; interestingly, this procedure had a significant effect on the lowering of blood cholesterol and LDL of docked lambs.
Blood Parameters;Carcass Characteristics;Fattening;Growth Traits;Lamb Docking;
 Cited by
Performance and carcass measurements of ewe lambs reared in a feedlot and fed wheat (Triticum durum Desf.) middlings total mixed rations in the summer season, Tropical Animal Health and Production, 2012, 44, 4, 779  crossref(new windwow)
Feeding of wheat middlings in lamb total mixed rations: Effects on growth performance and carcass traits, Animal Feed Science and Technology, 2011, 170, 1-2, 130  crossref(new windwow)
A review of morphological characteristics relating to the production and reproduction of fat-tailed sheep breeds, Tropical Animal Health and Production, 2011, 43, 7, 1267  crossref(new windwow)
Al Jassim, R. A. M., G. Brown, E. D.Salman and A. Abodabos. 2002. Effect of tail docking in Awassi lambs on metabolizable energy requirements and chemical composition of carcasses. Anim. Sci. 75:359-366

AOAC. 1990. Official methods and analysis 15th ed. Association of Official Analytical Chemists, Washington, DC

Bicer, O. 1988. An investigation on fattening performance and carcass traits of Awassi lambs. Ph.D. Thesis. Cukurova Univ. Fen Bil. Enst. Zootekni ABD, pp. 128. Adana, Turkey

Bicer, O., E. Pekel and O. Guney. 1992. Effect of docking on growth performance and carcass characteristics of fat -tailed Awassi ram lambs. Small Rumin. Res. 8:352-357

Bingol, M., T. Aygun, O. Gokdal and A. Yılmaz. 2002. The effects of docking on fattening ferformance and carcass characteristics of male Norduz lambs. The research report

Bingol., M., T. Aygun,, O.Gokdal and A. Yılmaz. 2006. The effects of docking on fattening performance and carcass characteristics in fat-tailed Norduz male lambs. Small Rumin. Res. 64:101-106 crossref(new window)

Bıyıkoglu, K., A. Cakır and O. Yazgan. 1977. The effects of docking of Morkaramans on growth, meat yield and quality in Eastern Anatolia. Ataturk Univ. Yay. 495, Zir.Fak.Yay. 232, Arastırma Serisi. 149, 40

Brenner, K. V. and P. Reinhard. 1976. Photometric determination and stability of free fatty acids in plasma and serum of cattle, Monath. Vet. Med. 18:707-711

Cengiz, F. and İ. Z. Arık. 1994. Effects of tail docking on fattening performance and carcass characteristics of Akkaraman lambs. Scientific Research and Studies Vol. 750, Publ. no.1356, Publication of Agric. Faculty, Ankara University

Cloete, J. J. E., L. C. Hoffman, S. W. P. Cloete and J. E. Fourie. 2004. A comparison between the body composition, carcass characteristics and retail cuts of South Africa mutton Merino and Dormer sheep. South Africa J. Anim. Sci. 34:44-51

El-karim, A. I. A. 1980. Effect of docking on growth and carcass characteristics of Dubasi desert sheep. Trop. Anim. Health Prod. 5:15-17

Fernandes, M. H. M. R., K. T. Resende, L. O. Tedeschi, Jr. J. S. Fernandes, I. A. M. A. Teixeira, G. E. Carstens and T. T. Berchielli. 2008. Predicting the chemical composition of the body and the carcass of 3/4Boer${\times}$1/4Saanen kids using body components. Small Rumin. Res. 75:90-98 crossref(new window)

Gokdal, O., T. Aygun, M. Bingoal and F. karakus. 2003. The effect of docking on performance and carcass characteristics of male Karakas lambs. South African J. Anim. Sci. 33(3):185-192

Kashan, N. E. J., G. H. Manafi Azar, A. Afzalzadeh and A. Salehi. 2005. Growth performance and carcass quality of fattening lambs from fat-tailed and tailed sheep breeds. Small Rumin. Res. 60:267-271 crossref(new window)

Littell, R. C., R. J. Freud and P. C. Spector. 1991. SAS-system for linear models, 3rd Ed., Cary, NC: SAS Institute. Inc. pp. 137-198

Mari, I. F. and L. B. Bahgat. 2003. Fat-tailed sheep traits as affected by docking. Trop. Anim. Health Prod. 35:351-363 crossref(new window)

Moharrery, A. 2007. Effect of docking and energy of diet on carcass fat characteristics in fat-tailed Badghisian sheep. Small Rumin. Res. 69:208-216 crossref(new window)

Obeidat, Belal S., Abdullah Y. Abdullah, Mofleh S. Awawdeh, Rami T. Kridli, Hosam H. Titi and Rasha I. Qudsieh. 2008. Effect of methionine supplementation on performance and carcass characteristics of Awassi ram lambs fed finishing diets. Asian-Aust. J. Anim. Sci. 21(6):831-837

Sarwar M., M. Aasif Shahzad and Mahr-un-Nisa 2007. Nutrient intake, acid base status and growth performance of Thalli lambs fed varying level of dietary cation-anion difference. Asian-Aust. J. Anim. Sci. 20(11):1713-1720

SAS. 2002. SAS User's Guide: Statistics, Software Release 9.0., SAS Inst., Inc., Cary, NC

Shelton, M. 1990. Influence of docking fat-tail (Karakul) sheep on lamb production. Small Rumin. Res. 3:73-76 crossref(new window)

Shelton, M., T. Willingham, P. Thompson and E. M. Roberts. 1991. Influence of docking and castration on growth and carcass traits of fat-tailed Karakul, Rambouillet and crossbred lambs. Small Rumin. Res. 4:235-243 crossref(new window)

Snyman, M., A. M. van Heerden, B. R. King and J. A. N. Cloete. 2002. The eeffect of ddocking on growth, carcass quality, fat distribution and reproductive performance of Namaqua Afrikaner sheep. Grootfontein ADI, Private Bag X529, Middelburg EC, 5900. _MA /stertaf.htm.

Wohlt, J. E., T. D. Wrigh., V. S. Sirois, D. M. Kniffen and L. Lelkes. 1982. Effect of docking on health, blood cell and metabolites and growth of Dorset lambs. J. Anim. Sci. 54:23-28