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Research articles

Time of shearing the ewe not only affects lamb live weight and survival at birth and weaning, but also ewe wool production and quality

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Pages 57-66 | Received 16 Jun 2017, Accepted 03 Oct 2017, Published online: 24 Oct 2017

References

  • Alexander G. 1964. Studies on the placenta of the sheep (Ovis aries L.). J Reprod Fertil. 7:289–305. doi: 10.1530/jrf.0.0070289
  • Banchero G, Vázquez A, Montossi F, De Barbieri I, Quintans G. 2010. Pre-partum shearing of ewes under pastoral conditions improves the early vigour of both single and twin lambs. Anim Prod Sci. 50:309–314. doi: 10.1071/AN09127
  • Cam MA, Kuran M. 2004. Shearing pregnant ewes to improve lamb birth weight increases milk yield of ewes and lamb weaning weight. Asian-Australasian J Anim Sci. 17:1669–1673. doi: 10.5713/ajas.2004.1669
  • Champion S, Robards G. 1995. The relationship between wool production, live weight and liveweight change in four specialty carpet wool breeds, Romneys and Merinos. Proc New Zeal Soc Anim Prod. 55:137–140.
  • Corner-Thomas RA, Hickson RE, Morris ST, Kenyon PR. 2014. The influences of live weight and body condition score of ewe lambs from breeding to lambing on the live weight of their singleton lambs to weaning. Small Rumin Res. 119:16–21. doi: 10.1016/j.smallrumres.2014.01.008
  • Dabiri N, Morris ST, Wallentine M, McCutcheon SN, Parker WJ, Wickham GA. 1996. Effects of pre-lamb shearing on feed intake and associated productivity of May- and August-lambing ewes. New Zeal J Agric Res. 39:53–62. doi: 10.1080/00288233.1996.9513162
  • Dalton DC, Knight TW, Johnson DL. 1980. Lamb survival in sheep breeds on New Zealand hill country. New Zeal J Agric Res. 23:167–173. doi: 10.1080/00288233.1980.10430783
  • Dick J, Sumner R. 1997. Seasonal changes in fibre and follicle characteristics related to wool bulk in Perendale ewes. Proc New Zeal Soc Anim Prod. 57:61–64.
  • Dýrmundsson Ó. 1991. Shearing time of sheep with special reference to conditions in Northern Europe : a review. Icel Agric Sci. 5:39–46.
  • Ehrhardt RA, Bell AW. 1995. Growth and metabolism of the ovine placenta during mid-gestation. Placenta. 16:727–741. doi: 10.1016/0143-4004(95)90016-0
  • Gootwine E. 2013. Meta-analysis of morphometric parameters of late-gestation fetal sheep developed under natural and artificial constraints. J Anim Sci. 91:111–119. doi: 10.2527/jas.2013-5363
  • Gunn RG, Sim DA, Hunter EA. 1995. Effects of nutrition in utero and in early life on the subsequent lifetime reproductive performance of Scottish Blackface ewes in two management systems. Anim Sci. 60:223–230. doi: 10.1017/S1357729800008389
  • Hawker H, Litllejohn RP. 1989. Relationsheps between staple strength and other wool characteristics of Romney ewes. New Zeal J Agric Res. 32:305–310. doi: 10.1080/00288233.1989.10423466
  • Heasman L, Clarke L, Stephenson T, Symonds M. 1999. The influence of maternal nutrient restriction in early to mid-pregnancy on placental and fetal development in sheep. Proc Nutr Soc. 58:283–288. doi: 10.1017/S0029665199000397
  • Henderson AE. 1968. Growing better wool. Wellington: AH & AW Reed; p. 108.
  • Kenyon PR, Blair HT. 2014. Foetal programming in sheep – effects on production. Small Rumin Res. 118:16–30. doi: 10.1016/j.smallrumres.2013.12.021
  • Kenyon PR, Morris ST, McCutcheon SN. 2002. Does an increase in lamb birth weight through mid-pregnancy shearing necessarily mean an increase in lamb survival rates to weaning? Proc New Zeal Soc Anim Prod. 62:53–56.
  • Kenyon PR, Morris ST, Revell DK, McCutcheon SN. 2002a. Maternal constraint and the birthweight response to mid-pregnancy shearing. Aust J Agric Res. 53:511–517. doi: 10.1071/AR01130
  • Kenyon PR, Morris ST, Revell DK, McCutcheon SN. 2002b. Nutrition during mid to late pregnancy does not affect the birthweight response to mid-pregnancy shearing. Aust J Agric Res. 53:13–20. doi: 10.1071/AR01001
  • Kenyon PR, Morris ST, Revell DK, McCutcheon SN. 2003. Shearing during pregnancy – review of a policy to increase birthweight and survival of lambs in New Zealand pastoral farming systems. N Z Vet J. 51:200–207. doi: 10.1080/00480169.2003.36368
  • Kenyon PR, Revell DK, Morris ST. 2006. Mid-pregnancy shearing can increase birthweight and survival to weaning of multiple-born lambs under commercial conditions. Aust J Exp Agric. 46:821–825. doi: 10.1071/EA05329
  • Latshaw W. 1987. Extraembryonic membranes and placentation. In: Latshaw W, editor. Veterinary developmental anatomy: a clinically oriented approach. Burlington (ON): B.C. Decker; pp. 49–74.
  • Montossi F, Pigurina G, Santamarina I, Berretta EJ. 2000. Selectividad animal y valor nutritivo de la dieta de ovinos y vacunos en sistemas ganaderos: teoría y práctica, INIA Serie Técnica. Editorial Hemisferio Sur, INIA, Montevideo, Uruguay.
  • Morris ST, McCutcheon SN. 1997. Selective enhancement of growth in twin foetuses by shearing ewes in early gestation. Anim Sci. 65:105–110. doi: 10.1017/S1357729800016350
  • Morris ST, McCutcheon SN, Revell DK. 2000. Birth weight responses to shearing ewes in early to mid gestation. Anim Sci. 70:363–369. doi: 10.1017/S1357729800054825
  • Mueller JP, Elvira MG, Sacchero DM. 2013. Animal fibers in Argentina: production and research. 64 th EAAP Annual Meeting, August 25–30; Nantes.
  • Nolan E, Farrell T, Ryan M, Gibbon C, Ahmadi-Esfahani FZ. 2014. Valuing quality attributes of Australian merino wool. Aust J Agric Resour Econ. 58:314–335. doi: 10.1111/1467-8489.12027
  • Osgerby JC, Gadd TS, Wathes DC. 2003. The effects of maternal nutrition and body condition on placental and foetal growth in the ewe. Placenta. 24:236–247. doi: 10.1053/plac.2002.0902
  • Parraguez VH, Atlagich M, Díaz R, Cepeda R, González C, De Los Reyes M, Bruzzone ME, Behn C, Raggi LA. 2006. Ovine placenta at high altitudes: comparison of animals with different times of adaptation to hypoxic environment. Anim Reprod Sci. 95:151–157. doi: 10.1016/j.anireprosci.2005.11.003
  • Reid T. 1998. Wool yellowing. Wool Technol Sheep Breed. 46:318–337.
  • Revell DK, Morris ST, Cottam YH, Hanna JE, Thomas DG, Brown S, McCutcheon SN. 2002. Shearing ewes at mid-pregnancy is associated with changes in fetal growth and development. Aust J Agric Res. 53:697–705. doi: 10.1071/AR01140
  • Russel AJF, Doney JM, Gunn RG. 1969. Subjective assessment of body fat in live sheep. J Agric Sci. 72:451–454. doi: 10.1017/S0021859600024874
  • Sphor L, Banchero G, Correa G, Osório MTM, Quintans G. 2011. Early prepartum shearing increases milk production of wool sheep and the weight of the lambs at birth and weaning. Small Rumin Res. 99:44–47. doi: 10.1016/j.smallrumres.2011.03.007
  • Sumner R, Clarke J, Pearson A, Speedy P. 1994. Repeatability of seasonal wool growth in merino sheep. Proc New Zeal Soc Anim Prod. 54:163–166.
  • Symonds ME, Bryant MJ, Shepherd DAL, Lomax DMA. 1988. Glucose metabolism in shorn and unshorn pregnant sheep. Br J Nutr. 60:249–263. doi: 10.1079/BJN19880097
  • Thompson BC, Muir P, Smith N. 2004a. Litter size, lamb survival, birth and twelve week weight in lambs born to cross-bred ewes. Proc New Zeal Grasslands Assoc. 66:233–237.
  • Thompson MJ, Briegel JR, Adams NR. 2004b. Effect of glucose or amino acid infusion during pregnancy in ewes with different wool growth responsiveness to nutrition. Aust J Agric Res. 55:47–55. doi: 10.1071/AR03118

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