Mid-pregnancy shearing can increase birthweight and survival to weaning of multiple-born lambs under commercial conditions

Australian Journal of Experimental Agriculture

Volumn 46, Issue 6-7, 2006, Pages 821-825

  Kenyon, P R ^a   Revell, D K ^b   Morris, S T ^a  

^a MASSEY UNIVERSITY   (New Zealand)

^b CSIRO   (Australia)

Author keywords

Lamb growth; Pregnancy shearing; Weaning weight

Indexed keywords

LIVESTOCK FARMING; PREGNANCY; SHEEP; SURVIVAL; WEANING;

ANIMALIA; OVIS; OVIS ARIES;

EID: 33745424174     PISSN: 08161089     EISSN: None     Source Type: Journal    
DOI: 10.1071/EA05329     Document Type: Conference Paper

References (40)

1. Alexander G, Lynch JJ (1976) Phalaris windbreaks for shorn and fleeced lambing ewes. Proceedings of the Australian Society of Animal Production 11, 161-164.
2. Black HJ, Chestnutt DMB (1990) Influence of shearing and grass silage quality on the performance of pregnant sheep. Animal Production 51, 573-582.
3. Cam MA, Kuran M (2004) Shearing pregnant ewes to improve lamb birthweight increases milk yield of ewes and lamb weaning weight. Asian-Australasian Journal of Animal Science 17, 1669-1673.
4. Dabiri N, Morris ST, Parker WJ, McCutcheon SN, Wickham GA (1995) Productivity and cold resistance in ewes pre-lamb shorn by standard or cover comb. Australian Journal of Agricultural Research 46, 721-732. doi: 10.1071/AR9950721
5. Dabiri N, Morris ST, Vallentine M, Parker WJ, McCutcheon SN, Wickham GA (1996) Effects of pre-lamb shearing on feed intake and associated productivity of May- and August-lambing ewes. New Zealand Journal of Agricultural Research 39, 53-62.
6. Dalton DC, Knight TW, Johnson DL (1980) Lamb survival in sheep breeds on New Zealand hill country. Journal of Agricultural Research 23, 167-173.
7. Dyrumundsson OR (1991) Shearing time of sheep with special reference to conditions in Northern Europe: a review. Icelandic Agricultural Sciences 5, 39-46.
8. Egan EO, Notman AB, Hill J (1997) Effect of partial replacement of barley with molassed sugar beet feed in concentrate given and winter shearing on the performance of pregnant ewes and survival of new-born lambs. In 'Proceedings of the British Society of Animal Science'. p. 181.
9. Fogarty NM, Hall DG, Holst PJ (1992) The effect of nutrition in mid-pregnancy and ewe live weight change on birth weight and management for lamb survival in highly fecund ewes. Australian Journal of Experimental Agriculture 32, 1-10. doi: 10.1071/EA9920001
10. Frengley GAG (1964) Out of season shearing with reference to farm management. In 'Proceedings of the 14th Lincoln Collage Farmers Conference'. pp. 50-56.
11. Geenty KG (1997) 'A guide to improved lambing percentage.' (Wools of New Zealand and the New Zealand Meat Producers Board: Wellington)
12. Geytenbeck PE (1962) A survey of post-shearing losses. Proceedings of the Australian Society of Wool Production 4, 185-186.
13. Gregory NG (1995) The role of shelterbelts in protecting livestock: a review. New Zealand Journal of Agricultural Research 38, 423-450.
14. Hight GK, Jury KE (1970) Hill country sheep production. II: Lamb mortality and birth weights in Romney and Border Leicester x Romney flocks. New Zealand Journal of Agricultural Research 13, 735-752.
15. Husain M, Morris ST, McCutcheon SN, Parker WJ (1997) Pasture management to minimise the detrimental effects of pre-lamb shearing. New Zealand Journal of Agricultural Research 40, 489-496.
16. Kenyon PR (2002) The effect of mid-pregnancy shearing on lamb birthweight and survival to weaning. PhD thesis, Massey University, New Zealand.
17. Kenyon PR, Morris ST (2002) Mid-pregnancy shearing a technique to improve multiple born lamb survival. Proceedings of the 32nd Seminar of the Society of Sheep and Beef Cattle Veterinarians NZVA 216, 243-254.
18. Kenyon PR, Morris ST, Revell DK, McCutcheon SN (2002a) Nutrition during mid- to late-pregnancy does not affect the birthweight response to mid-pregnancy shearing. Australian Journal of Agricultural Research 53, 13-20. doi: 10.1071/AR01001
19. Kenyon PR, Morris ST, Revell DK, McCutcheon SN (2002b) Maternal constraint and the birthweight response to mid-pregnancy shearing. Australian Journal of Agricultural Research 53, 511-517. doi: 10.1071/AR01130
20. Kenyon PR, Morris ST, Revell DK, McCutcheon SN (2003) Shearing during pregnancy - a review of a technique to increase lamb birthweight and survival in New Zealand pastoral farming systems. New Zealand Veterinary Journal 51, 200-207.
21. Kenyon PR. Morel PCH, Morris ST (2004) Effect of ewe liveweight and condition score at mating and mid-pregnancy shearing on twin lamb birthweights and growth rates to weaning. New Zealand Veterinary Journal 52, 145-149.
22. Lynch JJ, Alexander G (1976) The effects of gramineous windbreaks on behaviour and lamb mortality among shorn and unshorn Merino sheep during lambing. Applied Animal Ethology 2, 305-325. doi: 10.1016/0304-3762(76)90065-1
23. McCorkindale AB (1999) CF2000 - a new way of looking at the same information. Proceedings of the New Zealand Society of Animal Production 59, 79-81.
24. Minitab (1998) 'Minitab version 12.1.' (Minitab Inc: State College, PA)
25. Morris ST, Kenyon PR (2004) The effect of sward height on performance of twin- and triplet-bearing ewes. New Zealand Journal of Agricultural Research 47, 275-286.
26. Morris ST, Kenyon PR, Burnham DL, McCutcheon SN (1999) The influence of pre-lamb shearing on lamb birthweight and survival. Proceedings of the New Zealand Grasslands Association 61, 95-98.
27. Morris ST, McCutcheon SN, Revell DR (2000) Birth weight responses to shearing ewes in early to mid gestation. Animal Science (Penicuik, Scotland) 70, 363-369.
28. Parker WJ, Morris ST, McCutcheon SN (1991) Wool production and feed intake in unmated and mated Border Leicester x Romney crossbred ewes shorn in July or November. New Zealand Journal of Agricultural Research 34, 427-437.
29. 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. Australian Journal of Agricultural Research 53, 697-705. doi: 10.1071/AR01140
30. Russel AJF, Doney JM, Gunn RG (1969) Subjective assessment of body fat in live sheep. Journal of Agricultural Science 97, 723-729.
31. Rutter W, Laird TR, Broadbent PJ (1971) The effects of clipping pregnant ewes at housing and of feeding different basal roughages. Animal Production 13, 329-336.
32. Sanson DW, West TR, Tatman WR, Riley ML, Judkins MB, Moss GE (1993) Relationship of body composition of mature ewes with condition score and body weight. Journal of Animal Science 71, 1112-1116.
33. SAS (1985) 'SAS user's guide statistics.' 5th edn. (SAS Institute Inc.: Cary, NC)
34. Scales GH, Burton RN, Moss RA (1986) Lamb mortality, birthweight and nutrition in late pregnancy. New Zealand Journal of Agricultural Research 29, 75-82.
35. Sheath GW, Webby RW, Keeling P, Thompson RD, Page CR, Burton GT (1999) The results and success factors of 9 group farm monitoring programmes. Proceedings of the New Zealand Society of Animal Production 59, 87-90.
36. Stott AW, Slee J (1985) The effect of environmental temperature during pregnancy on the thermoregulation in the newborn lamb. Animal Production 41, 341-347.
37. Symonds ME, Bryant MJ, Clarke L, Darby CJ, Lomax MA (1992) Effect of maternal cold exposure on brown adipose tissue and thermogenesis of the newborn lamb. Journal of Physiology 455, 487-502.
38. Thompson BC, Muir PD, Smith NB (2004) Litter size, lamb survival, birth and twelve week weight in lambs born to cross-bred ewes. Proceedings of the New Zealand Grasslands Association 66, 233-237.
39. Vipond JE, King ME, Inglis DM, Hunter EA (1987) The effect of winter shearing of housed pregnant ewes on food intake and animal performance. Animal Production 45, 211-221.
40. Wodzicka-Tomaszewska M (1963) The effect of shearing on sheep. In 'Proceedings of the Ruakura Farmers Conference'. pp. 2-39.