carcass tissue, fat depots, non-carcass component, growth, Karadi.


To study the allometric growth of body and carcass traits, twelve new born Karadi lambs were docked within 3 days of their birth using rubber-rings, and left with their mothers till weaning (2.5 months). Another 12 weaned Karadi lambs obtained from local market were left intact. Following an adaptation period of a week, the docked and intact lambs with an average initial weight of 16.83±1.522 and 19.92± 0.748kg, respectively were randomly divided into three equal groups to be slaughtered at 20, 30 and 40kg. Results revealed that the allometric growth coefficients of both docked and intact lambs of dissectible lean and bone were negative heterogenic (b<1), indicating an early maturing tissues, while the growth of dissectible fat is a late maturing tissues. In both groups, loin, shoulder, foreshank and rack are an early maturing cuts, neck is isogonic, while leg in intact lambs is an early maturing whereas in docked lambs grew at a similar rate to carcass. In docked and intact lambs, carcass fat relative to empty body weight is an early and late maturing tissues, whereas non-carcass fat is isogonic and grew at a similar rate to empty body weight in both groups. The growth of pelt, liver, lung and trachea and heart were isogonic and grew at a similar rate to empty body weight in both groups


Metrics Loading ...


. Abd, Z. F.; M. M. Sultan and S. S. Abd. 2020. Impact of herd size on the productive efficiency of sheep breeding projects at the kokjali region in Nineveh governorate for the production season 2018. Iraqi Journal of Agricultural Sciences :51(6):1613-1622.

Al-Jassim, A.F. and M.N.R. Al-Saigh. 1999. Some aspects of postnatal growth of Arabi sheep. 2. Live weight and body organs. Indian Journal of Animal Sciences. 69: 604-608

Aljubouri, T. R. S.; A. F. Hassan. M. B. S. Al-Shuhaib. 2021. Remarkable correlation of non-genetic factors with growth traits in two breeds of sheep. Iraqi Journal of Agricultural Sciences –2021:52(2):309-314.

Alkass, J.E., Kh.A Darwesh and K.Y. Merkhan. 2014. Performance of docked vs. undocked fat tailed sheep: A review. Advanced Journal of Agricultural Research, 2(003): 029-037

Al-Owaimer, A., G. Suliman, A. El-Waziry, H. Metwally and M. Abouheif. 2013. Allometric Growth Patterns of Body and Carcass Components in Ardhi Goat. International Journal of Animal and Veterinary Advances 5: (5), 183-189. ISSN: 2041-2894; e-ISSN: 2041-2908

Al-Saigh, M.N.R. and A.F. Al-Jassim. 1998. Some aspects of postnatal growth of Arabi sheep. 1. Carcass muscle, bone, fat and wholesale joints. Indian Journal of Animal Sciences. 68: 965-968

Al-Sherwany, D.A.O. and J.E. Alkass. 2021. A comparative study on growth, carcass traits and body composition of Awassi and Karadi lambs raised under two levels of feeding and slaughtered at different weights: 1- Growth performance and carcass traits. Iraqi Journal of Agricultural Sciences. 52 (5): 1101-1108.

Al-Sherwany, D.A.O. and J.E. Alkass. 2023. Impact of docking Karadi lambs on growth performance, carcass trait and body composition. Iraqi Journal of Agricultural Sciences. 54 (3): 625-635.

Alvarez-Rodrıguez, J., A. Sanz, M. Joy, S. Carrasco, G. Ripoll and A. Teixeira. 2008. Development of organs and tissues in lambs raised on Spanish mountain grassland. Canadian Journal of Animal Science. Box 172. Zip code 5301-855. P: 37-45

Atti, N., H. Ben Salem and A. Priolo. 2003. Effects of polyethylene glycol in concentrate or feed blocks on carcass composition and offal weight of Barbarine lambs fed Acacia cyanophylla Lindl. foliage. Anim. Res. 52: 363-375

Carvalho, S., L.C. Zago, C.C. Pires, A.A. Martins, R.S. Venturini, J.F. Lopes, V.M. Pilleco, R.R. Simões, D.D. Bruti and A.B. Moro. 2016. Tissue composition and allometric growth of tissues from commercial cuts and carcass of Texel lambs slaughtered with different weights. Semina: Ciências Agrárias, Londrina. 37: (4), 2123-2132

Dhanda, J.S., D.G. Taylor, J.E. McCosker and P.J. Murray. 1999. The influence of goat genotype on the production of Capretto and Chevon carcasses. 1. Growth and carcass characteristics. Meat science, 52: 355−361

Galvani, D.B., C.C. Pires, F. de. Oliveira; T.P. Wommer and F. Jochims. 2008. Allometric growth of the carcass components of feedlot Texel × Ile de France crossbred lambs from weaning to 35kg live weight. Ciência Rural, 38: 2574-2578.

Garcia, I.F.F., T.I.R.C. Alvarenga, J.R.O. Perez, A.K.. de Almeida, S.B. Gallo, I.G. Pereira, N.G. Alves and F.A.P. Alvarenga, 2014. Allometric growth of non-carcass components in crossed lambs. Ciência Rural, Santa Maria, 44: (7), 1229-1235

Gokdal, O., T. Aygun, M. Bingol and F. Karakus. 2003. The effect of docking on fattening performance and carcass characteristics of male Karakas lambs. South Afr. J. Anim. Sci., 33: 185-192

Hadi, Y. A.; A. A. Mnati; and S. Y. Abdulfattah. 2020. Study of genetic diversity using microsatellite markers in Iraqi sheep breeds. Iraqi Journal of Agricultural Sciences :51(5):1367-1374.

Hashimoto, J.H., J.C. da S. Osorio, M.T.M. Osorio, M.S. Bonacina, R.I. Lehmen, And C.E. da S. Pedroso. 2012. Carcass quality, parts and tissue development of lambs finished in three systems. Revista Brasileira de Zootecnia, 41: 438-448.

Huxley, J. 1932. Problems of Relative Growth. Methuem, London

Jenkins, T.G. and K.A. Leymaster. 1993. Estimates of maturing rates and masses at maturity for body components of sheep. J. Anim. Sci. 71: 2952-2957

Kirton, A.H., P.D. Fourie and K.E. Jury. 1972. Growth and development of sheep. New Zealand Journal of Agricultural Research. 15: 214-227.

Luaces, M.L., C. Calvo, A. Fernandez, J.L. Viana, B. Fernandez and L. Sanchez. 2007. Comericial cuts study and their development in Gallega breed lambs carcasses. Arch. Zootec. 56 (214): 157-168

Mahgoub, O. and G.A. Lodge. 1994. Growth and body composition of Omani local sheep. 2. Growth and distribution of musculature and skeleton. Animal Production 58: 373–379

Mahouachi, M. and N. Atti. 2005. Effects of restricted feeding and re-feeding of Barbarine lambs: intake, growth and non-carcass components. Anim. Sci. 81: 30 5-312

Marchial, A., J. Castro, M.L. Capote and A. Zamorano. 2003. Effects of live weight at slaughter (6, 10 and 25 kg) on kid carcass and meat quality. Livestock. Prod. Sci., 83: 247-256

McGregor, B.A., 1992. Body composition, body condition scores and carcass and organ components of grazing Angora goats. P. Aus. S. Ani., 19: 273-276

Mora, N.H.A.P., F. de Macedo, J.C.S. Osorio, E.N. Martins, A.A. Mexia and T.G. de. Macedo. 2014. Allometry in carcasses of lambs of the Pantaneiro genetic group slaughtered with different subcutaneous fat thickness. Acta Scientiarum: Animal Sciences, 36: 427-432

Mtenga, L.A., E. Owen, V.R.M. Muhikambele and G.C. Kifaro. 2005. Developmental Changes of Fat Depots-in Male Saanen Goats. Tanzania J. Agric. Sc. 6: (2), 99-103.

Mtenga, L.A., E. Owen, V.R.M. Muhikambele, G.C. Kifaro, D.S.C. Sendalo, N.F. Massawe, S.M. Kiango and D.R. Nkungu. 1994. Growth and partition of fat depots in male British Saanen goats. In “Small Ruminant Research and Development in Africa. Third Biennial Conference of the African Small Ruminant Research Network,” (L. S. H. B. a. K. E., ed.), pp. 255-258.

Negussie1, E., O.J. Rottmann, F. Pirchner, and J.E.O. Rege. 2004. Growth and carcass composition of tropical fat-tailed Menz and Horro sheep breeds. British Society of Animal Science. 78: 245-252

Osorio, J.C.S., M.T. Osorio, N. M. Oliveira and L. Siewerdt. 2002. Qualidade, morfologia e avaliacao de carcaças. Pelotas: Editora e Gráfica Universitária, 196 p

Pena, F., V. Domenech, F. Aparicio and D. Mendez 1989. Caracterısticas de la canal en corderos de raza Segurena. I. Componentes corporales no incluidos en la canal. Archiv. Zootec. 38 (141): 107-125

Phoya, R.K.A. and T.H.A. Kamoto. 2000. Tissue partitioning of the indigenous Malawi goat. Tropical Agriculture, Trinidad 77: 38–41

Rodrigues, S., V. Cadavez, E. Pereira, R. Delfa and A. Teixeira. 2003. Alometria das pecas de talho em cordeiros das racas Churra Galega Bragancana e Suffolk. Page 90 in Produzir qualidade em seguranca. Livro de resumos, XIII Congresso de Zootecnia, Associacao Portuguesa dos Engenheiros Zootecnicos

Rosa, G.T., C.C. Pires, J.H.S. Silva, and O.S. Motta. 2005. Muscle, fat and bone allometric growth in Texel lambs carcasses cuts in relation to the feeding methods and slaughter weight. Ciência Rural, Santa Maria, 35 (4): 870-876

Rosa, G.T., C.C. Pires, J.H.S. Silva, and O.S. Motta. 2002. Proportions and Coefficients of Growth Components, Non-Carcass of the Live Weight of Male and Female Lambs under Different Feeding Methods. R. Bras. Zootec. 31: 2290-2298

Rouse, G.H., D.G. Topel, R.L. Vetter, R.E. Rust and T.W. Wickersham. 1970. Carcass composition of lambs at different stages of development. J. Anim. Sci. 31: 846855

Sabbioni, A., V. Beretti, M. Ablondi, F. Righi and P. Superchi. 2018. Allometric coefficients for carcass and non-carcass components in a local meat-type sheep breed. Small Ruminant Research, 159: 69-74. DOI: smallrumres.2017.11.005

Santos, C.L., J.R.O. Perez, L.C. Gerassev, O.V. Prado and J.A. Muniz. 2001. Estudo do crescimento alométrico dos cortes de carcaça de cordeiros das raças Santa Inês e Bergamácia. Ciência e Agrotecnologia, 25(1): 149-158.

Santos, C.A., F.A.F. Macedo, G.R.A. Santos, A.D.F. Santos, M.J.A.F. Melo, L.C.G. Rassetti, A.J.C. Teixeira and N.H.A.P. Mora. 2020. Allometric growth of ½ Dorper + ½ Santa Inês lambs slaughtered with different subcutaneous fat thicknesses. Animal Science. 55:1678-3921

Santos, C.L. 1999. Performance, carcass characteristics and growth allometric of Santa Ines and Bergamacia lambs. Lavras: Universidade Federal de Lavras, (Dissertação-Mestrado en Zootecnia). 143p

Santos, V., J. Azevedo and S. Silva. 2000. Crescimento relativo dos varios componentes corporais de borregos da raca Ile-de-France. Rev. Portug. Zootec. VII: 29-41

Santos, V.A.C., S.R. Silva, E.G. Mena and J.M.T. Azevedo 2007. Live weight and sex effects on carcass and meat quality of ‘‘Borrego terrincho–PDO’’ suckling lambs. Meat Science 77: 654–61

SAS. 2012. Statistical Analysis System, User's Guide. Statistical. Version 9.1th ed. SAS. Inst. Inc. Cary. N.C. USA.

Silva, L.F., C.C. Pires, J.H.S. Silva, D.O. Meier, G.C. Rodrigues and R.M. Carneiro, 2000. Growth of lambs slaughtered at different weights. Bone, muscle and fat of the carcass and its cuts. Ciência Rural, Santa Maria, 30(4): 671-675

Snyman, M.A., M. Van Heerden, B.R. King, J.A.N. Cloete and M.I. Jonker. 2002. The effect of docking on growth, carcass quality, fat distribution and reproductive performance of Namaqua Afrikaner sheep. Grootfontein Agric. 5: 7-11

Sousa, M.A.P., A.C.S. Lima, J.C. Araujo, C.M.C. Guimaraes, M.R.S.P. Joele, I. Borges, L.C.C. Daher, and A.G.M. Silva. 2019. Tissue composition and allometric growth of carcass of lambs Santa Inês and crossbreed with breed Dorper. Tropical Animal Health and Production. 10.1007/ s11250-019-01886-2

Souza, D.A., A.B. Selaive-Villarroel, E.S. Pereira, J.C.S. Osório and A. Teixeira. 2013. Growth performance, feed efficiency and carcass characteristics of lambs produced from Dorper sheep crossed with Santa Inês or Brazilian Somali sheep. Small Rumin. Res. 114, 51–55

Teixeira, A., J. Azevedo, R. Delfa, P. Morand-Fehr and C. Costa. 1995. Growth and development of serrana kids from Montesano natural park NE of Portugal. Small Ruminant Res., 16: 263-269

Yanez, E.A., K.T. Resende, A.C. Ferreira, J.M. Filho, A.N. Medeiros and A. Teixeira. 2009. Relative development of tissues, commercial meat cuts and live weight components in Saanen goats. R. Bras. Zootec. 38: 366-373.




How to Cite